Quote Originally Posted by harris7
plants grow fastest with 24 hours of light. I agree that plants seem to grow more at night. but studies have show that plants grow fastest with 24 hours and grow 75% that speed with 18. This shows a linear curve between growth and hours of light.
Plants do not grow faster with 24hr light, marijuana can only process 16-18hr of light per day efficiently. I've had plants to grow 6" over night.
muordeeb Reviewed by muordeeb on . Help quick! seedlings brown spots! Hi, I have attached some pictures of what my seelings have started to look like in the last day. I am concerned about the slow growth and also the small brown spots on some of the leaves. Here is all the info: 400W metal hailide light approx 3' above the plants The seedlings are about 4 weeks old. They were transplanted to the hydro setup about 5 days ago. The pH has been kept at a constant 5.2 or in that close range, but when I woke up this morning it was at 7.1 Water temp is about Rating: 5