Athosanswered grow question 5 years ago It's hard to give you a real answer with no data of your feeding strength. For soil growing, it is recommended to use an EC / PPM meter, for coco and hydro, it is a must, or you will always be guessing if you are over or under feeding. Curled leaves edges and dark green foliage is a sign of over feeding, particularly, nitrogen (grow nutes). The easiest training techniques are both LST and TOPing; both can be used both in photoperiod strains and autoflowers, although for autos, you can only top before the 5th pair of leaves fully open and no later than that. Keep in mind that every time you TOP, the plant will need 7 to 10 days to recover.