Fimming can be even more effective than topping for increasing the yield of cannabis plants. Obviously, 4 main shoots are more than 2. Furthermore, fimming seems to effect the auxin distribution in marijuana even more profoundly than topping. Plants that have been fimmed not only develop a greater number of tops but also branch more abundantly.
Just make sure to FIM during vegetative growth. Precisely when to FIM is at the grower’s discretion. Take note plants will need about 1 week to recover and for the new growth to develop. Expect an ugly sight in the aftermath. A set of torn leaves if you pinch and a Medusa head of colas are typical.
Fimming is a very flexible pruning for yield method and can be blended into a mix of other training and pruning techniques for maximum yield. A FIM crop of a handful of cannabis plants combined with a ScrOG can be just as productive as a SOG with 2-3 times the number of plants.
In the US it’s common for growers to pinch off the tops from infant cannabis plants barely out of the seedling phase. Although this ensures plants will grow like bushes, it needs to be followed by LST and/or a ScrOG. If you have got the hands-on experience in all the above techniques, go for it. But for the novice grower or growers without the time for a lengthy vegetative cycle, this is not ideal.
European cannabis growers prefer to wait until plants are around 30cm tall before applying pruning for yield methods. Allowing plants 3-4 weeks of vegetative growth to get to a decent size and develop means they will recover faster. Fimming can be applied anytime in the vegetative phase. No need to rush. Being patient in the early plant lifecycle can save you time later.
As is the case with virtually all pruning and training for high yield methods, it’s best to FIM during vegetative growth. Whenever you clip parts away from your cannabis plants, they will be stressed and will need some time to recover from the pruning. This is the primary reason to prune prior to the onset of flowering.
Topping a cannabis plant neatly with scissors by completely removing the tip from the main shoot gives rise to two new main colas. Fimming usually gives rise to 4 new main colas. These numbers can vary slightly depending on strain and how much of the main stem was removed. Furthermore, the FIM will also encourage the plant to bush out and fill lateral grow space too.
Fimming is a technique that does not lend itself to Autoflowering cannabis varieties. The stress of pruning the main stem and the associated recovery time will stunt the growth of Autos. On average growers using the FIM method will keep plants in vegetative growth for 4-6 weeks. That’s just too long for an Auto grower to wait.
An early applied FIM, as is preferred by US growers, is tremendously effective at transforming plants of any strain into squat branchy bushes. Plus the FIM method can be applied multiple times until the grower is satisfied with the density of the weed bush.
Fimming Cannabis: Everything You Need to Know FIM or F*ck I Missed – yes that’s really what this cannabis acronym stands for – is a pruning for yield method. Similar to topping, this
If you want to top the plant multiple times, you may be interested in learning about main-lining (creating a manifold – a plant training technique).
You get great results by breaking the tendency of the plant to grow one main cola while the plant is still short, because you can arrange your multiple colas however you want as the plant develops, instead of dealing with a Christmas tree shaped plant.
All plant training techniques are designed to help growers get a more desirable plant shape and bigger yields without changing other aspects of their grow. For example, cannabis plants don’t naturally grow in a way that takes full advantage of indoor grow lights – a lot of light is wasted indoors when cannabis plants are allowed to grow naturally without training.
These thickened connections demonstrate that your cannabis plant is spreading energy more evenly across the whole plant.
…In the same amount of vertical space as a plant like this
Topping & FIMing Involve Removing or Damaging Top Growth. This Reveals Hidden Growth Tips and Signals Plants to Start Putting Energy into Them
Topping and FIMing are two cannabis plant training techniques that involve “pinching” or cutting off some of the top growth. These techniques are designed to give you a free way to achieve better plant shape (to make better use of the available light), create more colas, and achieve bigger yields.
When topping your marijuana plant, it’s best to top the plant when it is young, and has 4-6 nodes (sets of leaves) in total. Although you could do it a little earlier, you’re more likely to accidentally stunt your plant the younger it is. Additionally, the less actual plant matter you take off, the less likely the plant will get stressed. Think about it, if you’re taking off 10% of the plant it will have much less effect than if you took off 30% of the plant.
After being topped or FIMed, your plant will need some time spent recovering in the vegetative stage, though generally this just causes the plant to ‘fill out’ more instead of growing taller, which is often desirable for indoor growers.
Topping and FIMing are two plant training techniques that involve "pinching" or cutting off some of the top growth of your plant. These techniques are designed to give you a free way to achieve better plant shape (to make better use of the available light