By removing the leaves you do double harm; you handicap the plants ability to produce vital energy and you also remove the energy that has already been stored for future use. Furthermore, although it cannot be observed with the naked eye, some light actually passes through the leaves and that is why some of the lower growth stays green throughout the entire grow. It is better to tuck or tie the leaves under the canopy so that light reaches more bud sites, or alternatively cut the leaves in half.
Another thing to keep in mind is that there is a hormonal response in plants to being wounded. This includes a growth inhibitor called jasmonic acid. The more you remove at any given time, the greater the response. This translates into stunted growth in extreme cases. It is therefore wise to trim the plants gradually throughout flowering, instead of removing all the growth at once. This hormone also plays a part in regulating the formation of trichomes, and that is probably why a little bit of stress is thought to increase potency. There is however a difference between stress and torture, a healthy plant will always produce more bud than a plant that has been severely handicapped. Since most of the photosynthetic activity takes place in the leaves, the buds themselves do not need light.
The primary function of the floral structures is to produce seeds, not photosynthesize. The smaller leaves on the bud provide them with energy locally but for the most part it’s the larger fan leaves that supply the plant with energy, especially the roots. The larger fan leaves have the greatest surface area and also the greatest concentration of chloroplasts, which are small cell structures that contain chlorophyll, and we all know that plants use chlorophyll to capture sunlight. It is however important that the lower shoots receive some light or the plant will start to elongate the branches, which results in fewer nodes and longer internodes. This is counterproductive since we want as much bud as possible. This is where a Scrog net comes in handy, you can redirect the branches and tie down the leaves without removing them and thereby allow more light to reach the lower buds while no energy is lost. Sometimes you do not have a choice and must remove some of the growth in order to ensure that you get a good harvest. It all depends, some plants respond well to rigorous pruning but in general I would advice that you keep it to a minimum since there are optional methods to removing the leaves altogether. The rules of pruning are a bit different when it comes to SOG grows as you might have to remove some of the fan leaves because the plants are packed so close together, shading each other. I think that the best advice is to watch your plants closely and adapt your technique and grow style according to the needs of the plant. All grow rooms are different and so is each strain of cannabis. In fact every plant is different from the next so you will have to try out what works best for you and your plants. I hope that this guide at least gave you a general idea of what the methods are and how they can be applied for a greater harvest. Inicio » Tips » When and How to Prune Marijuana Plants. When and how to prune marijuana plants: depending on why you want to prune your plants, you’ll need to do it one way or another, or at a certain time or another. You wouldn’t prune the same way if you want to make a parent plant , then if you wanted your plant to have a more distributed production in order to have a more discreet plant or if it’s just the way that that particular variety is grown. We’re going to talk about a few different pruning situations , along with a picture and an explanation so that you know where you have to cut depending on the result you want, because not all pruning is done the same or for the same reason, so each type has a different effect on your plants. Where to cut if you want to get a clone : To do this, you need to make sure that the part of the plant that you want to use as a cutting is above where you’re cutting , and that there are a few small branches on it. You also need to leave a knot above the spot where you cut so that when you plant it again you can plant it deep up to the knot, because that’s where the roots will be coming out of . You’ll need to cut it just like the picture, take off the little branch from the knot where we’ll be burying our plant, make sure that you cut it at a 45º angle, and then you should put it straight into some rock wool, jiffy, or whatever you prefer. After a few days, following the right steps (go check out the article we’ve done specifically on rooting clones), your plant should have some roots. Where to cut with the FIM pruning method : The FIM prune is a type of cut that’s not followed through on , and it produces 4 or 5 new sprouds. At the beginning they may seem strange and deformed, but they’ll soon turn into sturdy branches , you just need to give them time. This kind of technique is perfect if you want to turn a cutting from another plant into a parent plant.
Using the FIM method, you can get a lot of new branches on your plant, which will cause new slip sprouts to appear on the upper layers, which is what you’re after.
The first time I tried this I got very good results even though I had never done it before, even though it might seem difficult, you just need to try and leave the middle tip when the cutting is still small, like in the picture, taking away about 60% of the tip and leaving the little leaves that were starting to come out. If you want, you can repeat the process when the tip begins to come out again. You’ll end up having an extremely dense parent plant, which’ll be extremely productive, meaning you can have a SCROG set up with a mesh in your grow room or grow tent.