As we discussed above, tall and skinny is not productive under a small light. I grew marijuana initially using this method, based on books and magazines that I learn before designing my 250 watt system, and it worked well for many years, yielding just over 1 oz. per ft. Not bad, but it can be so much better.
Some pot plants growing have brittle stems, and are difficult to train. So long as the marijuana seed structures in the cannabis plant that carry fluids arent damaged too much, the shoot will heal and be just fine. It may also be possible to top brittle marijuana plants under the screen, so that the future marijuana growth will be in several, more slender shoots. I have no experience in training a cannabis seeds grow by topping.
Marijuana plants that grow into and fill the screen seem to put on better bud weight than overgrown plants that are tied down and whacked back to fit. Error on the side of forcing early, learn from what happens and adjust on the next crop. Marijuana seeds.

How to grow marijuana ?. The plantlet sea of green method was developed to increase the speed of cannabis growing in limited height situations. In a typical sea of green setup of this type, clones are planted at densities as high as 9 per sq. ft. Within a short time after being established, the lights are switched to a 12 hour dark period. What happens to the planted clone?