Hey there bobhead,

Most mj plants will stretch or grow 2-3 times thier vegged height during flowering.

You can keep them shorter during flowering using far red (730nm) light supplemation. A good economical source of far red are incandescent halogen bulbs.

In my personal grow, the far red comes on 1/2 hr before my main lights kick in and stay on another 1/2 hr. At the end of the photoperiod they come on again 1/2 hr before lights out and stay on 1/2hr after the main lights go off.

I recently came across a scientific paper that basicly said that just 15 minutes of far red at lights out works. I have not experimented with that, yet.

OM
oldmac Reviewed by oldmac on . Stretching During Flowering Hi, I need advice on how to keep nodes compact during flowering. My plants were very compact in veg. However, when I switched to 12/12, they went from 12 inches to about 30 inches in a week! I kept the lights super close to try and prevent stretch, but they kept hitting the lights and I had to move it up every day. I have a 400w HPS growing in DWC. I have a couple in soil and those hardly stretched at all. My goal is to produce massive colas. Rating: 5