It will stretch for up to 30 day's. Most slow the stretching after 21 day's but they normaly stop at 30 day's. If they stretch after that you have the lights to far away and they feel they need to reach for it.
Zandor Reviewed by Zandor on . Need some advice My plants are at 16 days of flowering and they wont stop stretching. They were started at an average of 11" and now they are at 31". I know that some strains can triple in height but damn! This is only the second week. The seeds were given to me and were supposed to be NL but who knows with free seeds. They could be (and most likely are) F2's or beyond. I have been keeping the 400 HPS a lot closer then I normally would to try to stop the stretch but it hasn't helped at all. I keep Rating: 5