All posts by Thomas Duke

About Thomas Duke

I am licensed by the state of Colorado's Medical Marijuana Enforcement Division. I am licensed to grow medical marijuana for a dispensary. I had to pass a background check by the FBI, have no arrest records, and pass an inspection of 10 years of Federal Income Tax Returns.

Transplanting Cannabis and How

Tom’s facts on how to properly repot marijuana plants !

So You Think You Know How to Repot Marijuana.

Think Again ! I’ll Bet 75% of The Folks Reading This Do Not Know How To Transplant Marijuana Properly ! Are You Part of the 75%? I Bet You Are !

  1. Introduction – Why I know What I Know!Marijuana in 1 gallon Pots
  2. What Is The Goal Of Repotting ?
  3. How Often Should I Repot My Plants ?
  4. How Large Of A Pot To Use ?
  5. What Type Of Pot Is Best ?
  6. How Do You Know When To Repot ?
  7. When To Transplant & Repot !
  8. Preparation Of Soil For Transplanting !
  9. Seedling & Clone Transplanting !
  10. Did The Soil Sink In Your Pot After Transplanting ?
  11. Preparing To Repot !
  12. The Art Of Repotting !
  13. 75% Of Growers Don’t Do This But They Should !
  14. The Proper Techniques Nobody Tells You About ! 99% Of Growers Don’t Do This But They Should !
  15. Conclusion ! – What You Should Keep In Mind When Repotting !

Introduction – Why I know what I know !

The Internet
The Internet connections !

The Internet Doesn’t Know ! Transplanting cannabis and how to go about it is all over the internet and I have also been all over the Internet , reading what other growers have to say about transplanting and repotting and I am surprised at all the misguided, uninformed and totally wrong information out there. I have not found even one website or marijuana  forum that know how to repot properly. There are a couple of sites that have some good information but not complete information. I’m sorry if I sound arrogant on this subject, it’s just that I have repotted all kinds of plants for a living for over 35 years now and I am surprised at the ignorance on this subject. It’s not just the beginners that don’t know, it’s also the experts that don’t know the proper techniques.

My Experience ! When I operated a retail nursery and tropical greenhouse I repotted Marijuana Plantsthousands of plants and hundreds of different varieties of plants from cacti to large trees. The technique of transplanting remains basically the same for all. The only difference is the potting medium and how careful you need to be with the root structure. There are a few plants that do not want their roots disturbed at all and other plants that just don’t really care what you do to their roots. Marijuana is one of those plants that tolerates some root abuse.  I have also transplanted thousands, yes, thousands of marijuana plants for a Colorado medical marijuana dispensary grow. I have only had trouble with maybe two or three transplants out of thousands. It’s not rocket science and anybody can do it properly if taught the proper methods.

Marijuana Plants Are Forgiving ! Fortunately marijuana plants are very forgiving and canforgiveness withstand poor repotting. Marijuana is just a weed that can grow just about anywhere and in just about any kind of soil. Learning the proper techniques will make an impact on your plant’s ability to grow properly. No, it won’t increase the THC content of your buds, but it will mean your plants will establish themselves quickly, becoming stronger faster. They will also grow better with less stress and you will have a successful transplanting.

What Is The Goal Of Repotting ?

I think this is really important to know, that most folks don’t think about. Do we transplant to get more nutrients to the plants roots ? Yes, but that not the main reason, because we Rootscan give the plants liquid fertilizer. Do we transplant to make the plants grow larger ? Well, larger plants are the result of transplanting, but that’s not why we repot plants.The real reason we repot plants is to give the plants more room to spread their roots. Marijuana plants love to spread out their roots. The faster they spread out their roots the faster they grow. Simply put, the main reason we repot a plant is to allow more space for the roots to spread out and grow .

This is also the reason We Don’t Repot Flowering Plants. What is the point to repotting a flowering plant ? There is no point ! When a marijuana plant is flowering, is not the time to try and take energy away from the flowers and grow roots. The fact is, if you repot a plant Flowering Marijuana Plantthat’s already been triggered into flowering , repotting that plant will not help it in any way. Once you trigger flowering, that is where the plants energy is going to go. At this point the plant has no reason to grow more roots. The plants growing is done and all it wants to do now is flower and produce the next generation. The time for repotting was 4 to 8 weeks before going into the flowering room. If you think your flowering plant needs more nutrients, repotting is not the way to go to accomplish the task. Use liquid organic fertilizers or compost teas at this stage instead of repotting.

How Often Should I Repot My Plants ?

As Little As You Can Get Away With ! Really, I’m not kidding ! Marijuana grows really fast and does not like it roots crowded. The more the marijuana plant can spread its’ roots the faster it can grow big and strong. The more a marijuana’s’ roots get crowded the slower the plant will grow. If a plant is let to get too rootbound the plant can become miniaturised. Once this happens the plant may never grow out of the miniaturization, even after repotting, and if it slowly does, the branches are usually weak and break easily.

Repot Two to Three Times !  There is absolutely no reason to repot a growing organic marijuana plant anymore than three times and in most cases only twice in its’ lifetime. Organic Marijuana SeedlingsGrowing from seed is the only time it may need to be repotted three times.Other than from seed, repotting should only be needed twice.  A plant from seed may go to a 4″ pot and then to a 6″ pot and then into the finishing pot, what ever size that may be. The finishing pot(the pot it will stay in untill harvest) could be as small as a 2 gallon pot or up to a 30 gallon pot, as it all depends on your grow. In many cases a seedling will be fine to go straight from germinating to a 6″(1gal.) pot. Rooted clones are always good to go into a 6″(1gal.) pot and then into their finishing pot. Some growers will put their rooted clones straight into their finishing pots and that’s OK too, for experts.

How Large Of A Pot To Use ?

I repot a rooted seedling or a clone into a 6″ (1 gal.) pot. The soil in this 6″pot has 50% more perlite in the soil mix than the final growing mix. So if you have a 10 gallon(1.5cf.) bag of Rootbound Clonesoil(such as Roots Organics) and mix in 5 gallons of perlite you will have a good air to soil ratio for growing the young plants. I have found that this lighter mix gets more oxygen to the young roots enabling them to grow faster and thus the foliage does likewise. You will need to water more often with this much perlite in the soil mix, but that’s a good thing, as more nutrients become available from the soil with each watering. The plants will only stay in these pots for 3 to 6 weeks or untill they are between 9 and 12 inches tall. Then we repot them for the second and last time into the pots they will finish in.

From the one gallon pot I repot to a 7 gal. pot.  The size of pot you pick to transplant into from the 1 gallon pot will depend on your growing situation. The larger the pot the easier it Miniature Organic Marijuanais to take care of your plants and the more the plants like it. As I said, marijuana loves to spread out its roots so use the largest pot that you can or that makes sense to you. I could use a 10 gallon pot, but I’m finishing my plants at about 6 foot tall and I think the 10 gallon pot is unnecessary and over kill. I do however put my mother plants at home in a 10 gallon pot, and at the dispensary grow I put the mothers into a 15 gallon pot. I have finished plants in 1 gallon pots, 3 gallon pots and 5 gallon pots. All the plants did just fine, but I have found that I like the 7 gallon pots the best because it cuts down on the work (less watering) and I get a great yield on 6 foot tall plants. That’s from the floor and the pots are about 1 foot tall so the plants are really only 5 feet tall out of the pot by harvest time.

Can I Overpot a Marijuana Plant ? Yes ! It is possible to put a plant into a pot that is too Overpotted Marijuana Plantlarge. A clone is always good to go into a 6″(1 gal.) pot but I don’t recommend going any larger at this stage unless you are an expert and even then I don’t recommend doing so. When a small plant such as a clone is put in a pot that is too large too soon it may just sit there and grow mostly roots instead of foliage but that’s not the biggest problem with overpotting. A small plant in a large pot may not able to use the available water in the soil fast enough and this condition may actually begin to rot the roots. This is because not enough air is getting to the roots. The plant will appear to be overwatered even though you didn’t water it too much. An overwatered plant goes into a permanent wilt with no hope of recovery. It may appear as a thirsty plant, but you know it isn’t thirsty because the soil is wet.

What Type Of Pot Is Best ?

Black soft rigid plastic ! Plastic pots are relatively inexpensive and worth the cost. I suggest a black semi-rigid nursery pot. These semi-riged pots can be used over and over again for years. Black Plastic PotThe hard plastic pots don’t last as long and become brittle over time , which is why I don’t use them. Never use a clear pot or container as light can suppress root growth. Always make sure the growing container has drainage holes to prevent  the soil from staying too moist and the plant from sitting in water. I realize many people use solo cups and used yogurt containers, for seedlings, to save money, and they can work if you put drainage holes in the bottom of them, however, I think a little money spent on nursery pots is well worth the cost.

How Do You Know When To Repot ?

How can I tell if a plant needs repotting ? There are no tell-tale signs that a plant needs repotting. Many people think, that if some roots come out of the bottom drainage holes is Rootbound Marijuana planta sign the plant needs repotting. Not so !  When a plant is in a pot the roots of that plant searches out the boundaries of its’ container. This is how the roots grow : The roots grow out from the stem to the sides of the pot. when the roots reach the side of the pot they continue growing down the sides of the pot untill they reach the bottom of the pot. These roots then travel across the bottom of the pot. Some of these roots travel around the bottom of the pot but most of these roots will eventually turn back up into the center of the soil mass. However, a few of these roots will follow the path of the water and they may come out the bottom drainage holes. Just because this happened does not indicate a rootbound plant and it does not mean the plant needs a larger pot. All this means is a few of the roots have followed the water flow.

So how do you tell if a plants needs repotting ? The truth is you can’t. The plant isn’t going to tell you. The plant will not show any tell-tale signs. The leaves won’t droop or turn yellow like some growers believe. Those signs are an indication of going too dry between

Rootbound Plants

watering. Keep in mind, most plants and especially marijuana plants are fine being rootbound, as long as they are getting plenty of water and nutrients. In fact letting a plant get rootbound is the first step in creating a bonsai marijuana plant. Of course, this isn’t what we want our crop to do because it slows growth drastically, but the plant doesn’t care. So, how can you tell ? It’s always a judgement call on your part. If the plant looks too large for the pot that it is in then it’s a good time to repot. If you find you are watering often (every day or every other day) it’s probably a good time to repot and may actually be overdue for repotting. With marijuana it is best to let the size of the plant determine when to repot it.

When To Transplant & Repot !

When to Transplant Seedlings ! The proper time to transplant seedlings is when they have Marijuana Seedling Ready for Repottingabout three to four sets of leaves not counting the cotyledon leaves. ( these are the first leaves that appear and are rounded) Don’t go by height of the seedling, go by the number of nodes. (branches) The pot size for transplanting a seedling should be a 4″or 6 ” (1 gal.) pot depending on root development.

When to Transplant Clones ! Transplanting clones should take place when many roots are seenRooted Clone coming out of all four sides of the sphagnum cube (Rockwool cube, etc.) it was planted in. If you clone in a cloning soil mix, I would wait 3 to 6 weeks before repotting into the one gallon pot. (6″) This size of pot is perfect for rooted clones to begin their journey to adulthood.

When to Repot Plants In 1 Gallon Pots ! These plants will be ready for repotting  when the plants are anywhere between 9 and 12 inches tall. This will take Cannabis Setivaanywhere from 3 to 6 weeks from transplanting. The plants at this point will have well-developed roots that will fill the pot nicely. These plants may be planted into any larger pot size you want or they can be planted outside into mother earth to be kissed by father sky. Marijuana plants 1 foot tall in a 6″( 1 gal. ) pot cannot be overpotted if there is enough aeration ( such as perlite) in the soil. From this 6″ (1gal.) pot I choose to put my plants  into 7 gallon pots. What size you use is up to you and your grow.

 Preparation for Transplanting !

Water the Plant Before Transplanting ? Never ! This is an area where there seems to beWater Coming out of spigot a lot of confusion due to a lot of misinformation. The best time to repot a plant is right before its next watering. At this time the soil will be somewhere between half dry to two-thirds dry. We repot at this time for two reasons. Trying to take a plant out of a pot with wet soil is not only messier and harder, there is also a greater chance of tearing the roots down to the core. This is because the soil is heavy and can tear the secondary roots away from the main tap-root and stem. Keep in mind we are always going to water the plant after transplanting to settle the soil, so why would we want to water it before transplanting. You should never water your plants right before repotting them.

Wet or Dry Potting Mix ? It seems there is confusion on this also. The soil mix you are going to use should be 3/4 or 75% dry to be optimal. But, optimal isn’t necessary, as long as the soil mix isn’t wet or even close to wet. Do not water it before putting it into the pot. Do not water the soil you put in the bottom of the pot either. A dry soil mix is better than a soil mix that’s too moist when it comes to transplanting. Remember, we are going to water the plant immediately after the repotting is done.

Seedling and Clone Transplanting !

Transplanting Seedlings and Clones ! Did you germinate the seed or root the clone in a Marijuana Clonerooting cube or soil ? If your seedling sprouted in soil or your clone rooted in soil, do not break up the root ball as these roots are very thin and do not like to be disturbed. The seedling and clone at this stage does not have many roots and can go into shock easily.  Do not water these seedlings or clones in soil right before transplanting. The wet soil is heavy for roots and removing them from the pots while wet can tear the roots causing irreversible damage to the plant. When you transplant clones and seedlings the soil should be half dry and almost ready if not ready for a watering. If you used a rooting cube for germinating or cloning, it should be moist before transplanting.

Adjusting the Seedling and the Clones Height ! Are all of your seedlings and all of your clones the same height ? Did some of your seedlings stretch tall ? Are some or any of your seedlings falling over because the stems are weak. Transplanting is the time to correct Clones these problems. Fortunately for us the marijuana’s stem may be planted deeper in to the soil, giving strength and sturdiness to the seedlings weak stem. Any marijuana seedling or clone’s stem may be planted deeper to make the plants all the same height.  The seedlings may be planted as deep as you like up to the first branch past the cotyledon leaves.(sometimes called the seed leaves) However, most of the time you will only plant seedlings up to the cotyledon leaves as there will still be time to adjust the height at the next repotting.  Clones may be planted as deep as you like to adjust their heights to be the same. Cut off any of the clones branches that would be below the soil level when adjusting the height.  All of the stem that is planted deeper into the soil will send out roots , making the plant sturdier and establishing  it much quicker. Go to the art of repotting !

Did The Soil Sink After Transplanting ?

The soil in my pot has sunk and is now only 2/3 full. Has this happened to you ? Has Pot of Soilthe soil in your pots sunk leaving a large space at the top of the pot ? Are your soil levels all the same in your pots, or are some of them at different levels ? Have you found that after watering newly repotted plants the soil levels have sunk lower than you like ? The reason this has happened is from poor repotting techniques. There is an easy fix for this and it’s not adding soil to the top of the pot after repotting and watering.  When we are done repotting and after the first watering we only want between 2 and 3 inches of space at the top of the pot.  With the proper techniques this sinking soil level will never happen to your pots of soil again.

Preparing to Repot !

Sterilizing Pots ?  New pots ? Used Pots ? I have never sterilized a pot in my life and I have  sterlizing potsrepotted plants for over 35 years without ever having a problem. BUT, I always make sure that used pots have completely dried out between repotting. Living in Colorado, pots dry very quickly as we have very low humidity. I never stack moist pots on top of one another. I always make sure they dry out first. I never store pots outside where they may get wet from rain. If you take these few precautions sterilizing of the pots will not be necessary.

Prepare a Potting Area !  How you prepare will depend on how many plants you repot at a time. When I plant clones I am usually repotting  no less than ten of them at a Super Soil time. When I repot plants in a 6″(1 gal.) pots, I’m repotting no less than 9 at a time. For this reason I like to use a child’s plastic swimming pool that is 8 inches deep and 3 1/2 feet in diameter to hold the new soil for repotting. I do all of my repotting inside this pool as it keeps everything neat and confined to this space. The tub or container you pick should be large enough to hold a least one 10 gallon bag (1.5 cf.)of soil and the pot you are going to repot into. In the 3 1/2 foot pool I can put two 10 gallon bags of soil and one 7 gallon pot or two bags of soil and 10 one gallon pots.  I also like to put the repotting pool of soil on top of a table at waist level so I don’t have to bend over to repot plants.

The actual technique of repotting remains the same no matter what size pot you are 7 gal. Pot and soilrepotting into. The only difference is, with seedlings and clones we do not break up the root-ball or disturb the roots if we can help it. These small plants have few roots that are easily damaged so we want to keep their root-ball intact. Larger plants with strong established roots such as it is with plants in 6″(1 gal.) pots we will want to loosen up the root ball to a small extent. If a plant has become rootbound we will break up that root-ball to a large extent. More on this a little later in this article.

Using a Super Soil ? If you are using a super soil you will fill the pot 1/3 to 3/4 full of the super soil depending on the variety of marijuana you are growing. For most varieties filling the pot 1/3 full of super soil will be adequate.

Drainage at the Bottom of the Pot ?  As long as your pots have holes at the bottom of the pots for drainage you are in good shape. Some growers do like to use pebbles or perlite atPot With Perlite For Dranage the bottom of their pots for extra drainage but this is totally unnecessary for marijuana. This practice wastes space where more soil for roots would be. Now, this is a good practice if your plants pots are sitting in trays that catch the runoff water and you are not able to empty this water soon afterwards. Your plants should never sit in water any longer than one hour after watering, or you will risk root rot. The soil of plants sitting in water will have soaked up all the water they can within one hour. The rest of the water should be dumped or taken out of the tray. Some folks use a wet-dry vacuum to suck out this extra water.

 The Art Of Repotting !

Preparing the New Pot !The potting area is ready and the pot we want to repot into is inPot Half Full Of Soil the pool of new fresh soil. If you are using super soil fill your pot 1/3 to 1/2 full at this time. if you are not using super soil you will now fill your pot with the new soil up to the level you want the bottom of your plants root-ball to be.  Adjust this soil level per plant, so when all plants are repotted the top of all plants will all be the same height when done. Do not pre-moisten this soil.

How to Take the Plant to be Repotted out of its Pot !  Sometimes this is easier said than repotting a plant done. To make this an easy task, the plant to be repotted should be ready for a watering, meaning the plants soil should be between 1/2 and 3/4 dry. Squeeze the pots sides to loosen the soil from the sides of the pot. Another way to accomplish this, is to put the planted pot on its side, on a hard surface and roll the pot while pressing down on the pots sides until the soil becomes free from the sides. Next, place one hand over the top of the pot with the plants stem between your index finger and middle finger and grab the top of the pot with that hand. This is to support the plant as you turn this pot upside down to extract the plant and root ball from the pot. While this plant and pot are upside down take your other hand and tap the bottom of the pot to break it free from sticking to the pot. You may have to rap the bottom of the pot fairly hard to free its grip on the pot. The roots have a tendency to hold onto the sides of the pot and need to be broken free. After squeezing the sides of the pot and turning it upside down and then rapping the pot on the bottom the plant should slide out of the pot fairly easily.

75% of Growers Don’t Do This But They Should !

Loosen the Roots from its Bonds ! This is very important ! This is where most people fail, because many other websites have it wrong. Everybody is so afraid of shocking the Marijuana Roots Exposed roots. They are so afraid of root stress. They want to keep the root ball intact and just plant it. Wrong ! Keeping the root-ball intact may be fine for seedling and clones rooted in soil in small pots as their roots are weak and not well established. However, if these seedlings and clones have strong established roots, such as any plant in a 6″(1 gal.) pot or larger you will want to loosen the roots so they may immediately grow into the new soil. If you do not do this, the plant may not even realize it has been repotted and the roots will remain in the tight root-ball taking a long time to grow into the new soil. A plant that is really root-bound may never grow roots into the new soil unless the root-ball is loosened up. Don’t worry about shocking or stressing these well established plants. Marijuana IS just a weed, and a strong weed at that, and it is very forgiving to what you do to it. Loosing the roots to go into the new soil is the best technique for your plants and they will love it, for this enables them to establish themselves much quicker in this new larger pot.

Different Ways to Loosen the Roots! We want to loosen the roots on the outer edges and bottom of the root ball. Do this over another container to catch the falling soil as we do not want this soil falling into the new pot of soil. We want to do our best not to break up the Marijuana Roots Exposedrootball,and just loosen the roots, but if the root ball does breakup there is no need to panic. The way I usually loosen the roots is to rake the outside of the rootball with my fingers. Using your fingers like a rake, start at the top of the rootball and rake the root mass in a downwards motion. Soil should come loose and fall off the rootball exposing more of the roots. Do this all the way around the rootball. Next loosen the sharp top edge of the rootball so it is somewhat rounded. After that loosen the roots at the bottom eliminating the bottom sharp edges. This process should remove approximately 25% of the soil from the outside and bottom of the rootball exposing some of the roots. Another good way to do this is with a whisk broom or a similar brush. Using the whisk broom brush down the sides of the rootball, removing about 25% of the soil. Round the top and bottom edge of the rootball. Brush the bottom of the rootball loosening those roots too. When you are done there should be some roots hanging loose from the soil all the way around and at the bottom.

Rootbound Plants Need Drastic Measures to Loosen Roots. With rootbound plants you will need to be rough on the roots. You must do everything in your power to loosen those roots, if you don’t loosen these roots, don’t waste your time repotting this plant because it Rootbound Marijuanawon’t do any good. You may have to grab these roots and pull hard to get them loose. Roots will tear and break off doing this, but you must do it. In may cases the roots will be so tightly wound and tangled you will have to take a knife and cut down the sides of the rootball in four different places. Take the knife, starting at the top, and cut straight down the side. How deep the cut should be, will depend on the size of the rootball. If the rootbound plant is in a 6″ (1 gal.) pot the cut should be about 1/2 in deep. A rootball larger than 6 inches will require a 1 inch deep cut into the rootball, maybe more. Make at least four cuts the length of the Rootbound Marijuana rootball, 1/2 to 1 inch deep and pull the roots loose. Yes, some roots will break off and you will pull some roots off too, maybe even a lot of the outer roots will come off and that’s OK. Do this on the bottom of the rootball also using a knife if need be. This drastic measure in most cases will shock and stress the plant but it must be done. After repotting , this plant may and probably will wilt. This wilt may last 24 to 36 hours but will usually pick up and straighten within this time. Most plant will but  if it doesn’t straighten back up after this length of time it may be a gonner. If you are repotting a rootbound mother plant, clones should be taken before the repotting is attempted, so you don’t risk losing the strain.

Roots Exposed to Light and Air ? A little light and some air on these roots are not going to harm them. Now, you don’t want to do this in the bright sun or directly under a hot light and you don’t want to do this in front of a fan either. We also don’t want our roots exposed to the light and air for very long but you don’t have to rush yourself. As long as you keep to the task at hand and don’t stop in the middle of this to take a lunch, your plants roots will Transplanting Marijuanabe just fine.

Adjust the soil level ! The plant to be repotted is all prepped now with some roots exposed. Now is the time to adjust the soil level in the new pot so the plant will be at the height you want it. Marijuana should always be planted at least 1 to 2 inches deeper than it was before. If you want, it’s OK to plant it deeper. Any stem of the marijuana plant that is planted below soil level will send out new roots the entire length of the stem that is under the soil.

The Proper Techniques Nobody Tells You About !                    99% of Growers Don’t Do This But They Should !

Put Plant into the pot ! Place the prepped plant on top of the soil and fill the surrounding Marijuana Repottingspace with the new soil all the way to the top of the pot. Keep mounding this soil over the top of the pot all around the main stem, past the overflowing point. DO NOT PAT THE SOIL DOWN OR PACK THE SOIL ! Patting the soil down or packing the soil is one of the worst thing you can do when repotting a plant.Packing the soil will create air pockets in the soil mass and this can cause problems and even kill the plant.

Shake the Pot ! At this point the soil is mounded above the pots rim with the plant sticking Marijuana With Mounded Soil Ready For Repottingout of the top of the mounded soil. Next, while holding the plant steady in the middle of the pot, shake and rock the pot vigorously until the soil is even with the pot. The reason we do this is to make sure we have as much soil in the pot as we can without packing. Then, take the pot with the plant in it and place it on the floor. With the pot on the floor, bounce or tap the bottom of the pot fairly hard on the floor 5 to 10 times. This shaking and bouncing on the hard floor will “settle” the soil without packing it. When you are done doing this, the soil will have settled to about 1 inch below the rim of the pot.

 

Repotting Marijuana
       Soil After Shaking Flat
Marijuana Repotting
     Soil After Bouncing Pot On Floor

 

 

 

 

 

 

 

Marijuana After Repotting
            Soil After Watering

Let Water Do The Final Settling Of The Soil ! It is now time to water your freshly potted plant. This first watering after repotting is very important. This first watering will settle the soil farther to about 2 inches below the rim of the pot depending on the size of the pot. With this first watering you will need to fill the “well”(that’s the space between the top of the soil and the top of the pot) no less than twice and probably three times to ensure a thorough watering. The shaking and bouncing and watering will settle the soil naturally without packing the soil. The soil will continue to settle with more watering but not much, maybe another 1/2 an inch. With this method you are able to get the maximum amount of soil in your pot (without packing), making your pot more efficient and your plants roots very happy.

  • A 6″(1 gal.) pot – Soil will settle about 1/2 inch with bouncing the pot on the floor and another 1/2 inch with the first watering.
  • A 14″(7 gal.) pot – Soil will settle about 1 inch with bouncing the pot on the floor and another 1 inch with the first watering.
  • The larger the pot the more settling will occur. The smaller the pot, less settling will occur.

Fertilize With First Watering ? Fertilizing is not recommended with the first watering even though some growers do. Some growers like to use B-1 with the first watering to help with the shock of transplanting. That may be a good practice but I have found it to be watering canunnecessary. Some growers like to fertilize with 1/2 strength fertilizer with the first watering and that’s OK too. I don’t, again because I find it unnecessary. However, I do add a few amendments to the top of the soil and water those in with the first watering for plants going into a 7 gallon pot. I add nothing to 1 gallon pots. For 7 gallon pots I add the following amendments to the top of the pot before watering : 1 tablespoon Magnesium Sulphate (Epsom Salts), 1 teaspoon Dolomite Lime, 1 teaspoon powdered Humic Acid, 1 teaspoon of water-soluble Mycorrhizae. I add the Magnesium Sulphate, the Humic Acid , and the Mycorrhizae to help make nutrients in the soil available to the plant and the Dolomite Lime to buffer the PH. I don’t usually fertilize my plants untill they go into the flowering room unless I see a problem.

Light After The Repotting ? After repotting and transplanting it’s always a good idea to give these plants a little less light for 24 to 48 hours. This gives the plants a little rest to adjust to being repotted. This will slow down photosynthesis just a small amount allowing the plant to concentrate on settling and adjusting its roots. This is most important on too-late-for-repotting cartoon plants that we damaged a lot of roots on when transplanting, such as a rootbound plant. The more you had to pull apart roots and disturb them the more they need the rest from the bright lights. These plants are not able to take up water right away because of the damage we inflicted on their roots. These roots need a little time to heal before they can begin taking up water again. Fortunately for us marijuana plants heal fast and in most cases 48 hours is all the rest a plant needs to heal those roots. The plants that we repotted without a lot of root damage will heal themselves in 24 hours.  To give my plants this needed rest I just raise my lights higher above the plants. Granted, this doesn’t lower the light intensity all that much, but it is enough to give the plants a little rest. If you have a dimmable ballast, dimming the lights would be a better way to accomplish this.

Conclusion !

Things to keep in mind when repotting :

  1. Repotting is for the roots !   35% of people don’t know this.
  2. Never repot a flowering marijuana plant.  76% of people don’t know this.
  3. Repot your plants as little as you can get away with, 2 to 3 times at most.  36% of people don’t know this.
  4. The size of pot you use is important to your success, not too big not too small.   40% of people don’t know this.
  5. The best pot is a black semi-ridged pot.   32% of people don’t know this.
  6. Know when to repot and transplant.   66%  of people don’t know this.
  7. Do not water your plants right before transplanting.   53% of people don’t know this.
  8. Do not moisten the potting mix before repotting.   53% of people don’t know this.
  9. Marijuana stems may be planted as deep as you like to adjust the plants height as the entire stem planted below the soil level will send out roots.   64% of people don’t know this.
  10. How to keep soil from sinking to low in the pot after repotting. 99% of people don’t know this.
  11. Sterilizing of the pots is not necessary if you let them dry out between plantings78% of people don’t know this.
  12. Extra drainage such as pebbles and perlite in the bottom of the pot is not necessary as long as there are holes at the bottom of the pot.   37% of people don’t know this.
  13. Loosen the roots of all well rooted plants at the time of repotting. 75%  of people don’t know this.
  14. Rootbound plants need drastic measures to break up the rootball for a successful repotting.   86% of people don’t know this.
  15. Roots exposed to light and air is not a problem if it’s for a short time.   23% of the people don’t know this.
  16. Fill the newly repotted plants pot to overflowing with mounding of the soil and shake the pot untill even with the pot rim to settle the soil.   99% of the people don’t know this.
  17. Never ever pat the soil or pack the soil down in the pot as this creates air pockets in the soil mass.  84% of the people don’t know this.
  18. Bounce the pot on the floor to settle the soil after repotting. 99% of the people don’t know this.
  19. let the first watering do the final settling of the soil.  99% of the people don’t know this.
  20. Fertilizing repotted plants with the first watering is not recommended. 86% of the people don’t know this.
  21. Give plants less light for the first 24 to 48 hours after transplanting.   66% of the people don’t realize this.
  22. Transplanting cannabis and how you go about it is an essential part of growing organic marijuana.  100% of the people should realize this.

    -rising-plant-pot-gardening-cartoon
    Make Repotting Easy On Yourself !

Transplanting cannabis and how you go about it is an essential part of growing organic marijuana. If you follow the instructions above I can almost guarantee a successful transplanting and repotting if you have a proper soil mix. By proper soil mix I’m talking about a soil mix with proper aeration. Proper aeration is the most important factor in any soil mix. The facts presented above are all from scientific research, however the percentage  of people who don’t know the information is not.

Author, Tom D.