Hey quick question, im growing a medium height plant in a relatively small space, is it possible to control or influence the height of the plant by means of light placement (specifically with CFLs)? if not, or even in conjunction, anyone have any other good methods of size control?
PEACE. Not claiming to be an expert on the issue or anything in the like, I do have an answer that will give you a good idea of what is possible with the cfl's. I have grown EXCLUSIVELY with cfl's for a year at least now and I have not had an issue with height restrictions because I put the lights VERY close to the foliage. With a bit of venting the heat, you can grow very short and stuby plants under cfl's with the lights at no more than 6 inches away from the leaves at all times. As a cfl grower you will have more of a job becasue it seems that they grow into the lights every day. You will either 1) go crazy and forget about the cfl thing with all the light movement that is neccessary, 2) you will become more equipt to take on the light issue and it will get better and better with each new crop and even with the new growth stages.
The key is light placement. You also have the alternative of vegging for 2-3 weeks and then force flowering the plant. THis way you will have a better control over the height and it will be a bit quicker turn around. You have options that are unrelated to lighting which are useful as well such as LST (Low Stress Training) as well as topping and FIM (Fuck I Missed--type of topping where you only take the top 3/4 of the new growth). Couple this with the light proximity and you can grow quite well in a small area. The other alternative is to start the beans 12/12 from the first sight of a seedling, or starting the light cycle on 12/12 before they are even out of the seed hull. With the aforementioned method you wil get a bit of stretch in the begining but it is something that you can overcome with the proper potting and transplanting and it can even help to stunt the growth for you in the area that you have. THE KEY IS THE LIGHT PROXIMITY TO THE FOLIAGE.....THAT WOULD BE YOUR BEST BET....BETWEEN 3-6 INCHES FROM THE FOLIAGE TO BE EXACT!
GOOD LUCK KEEP IT GREEN AND BE SAFE
PEACE
BTW: A safer bet would be to go with AUTO FLOWER strains like the lowryder which stay under 3ft usually. but you can stunt them and get them to be 6 inches if you wanted. The yeild on the autos and the 12/12 form seed will not be anything to write about, but if it is for you personally then you wouldn't be concerned. Check the Auto AK47 which has nice yields and it is short. The deisel ryder is also a very popular strain of autos for it's potency and I believe for it's modest yield as well. Just some suggestions but look into the auto flowers and you will never have a room issue cause that is what they are made for....space restrictions