I'm growing a test plant (bag seed) to get the feel for it before I order some sativa seeds online now I am using soil from my outside garden so its not new fresh soil not even a year old yet and I have 92 watts of CFL's about an inch away my plant is about 2" at this point with two of the jagged leaves and 2 round ones. I am confused about nutrients I would love a simple answer what I was planning on doing was just buying the Fox Farm trio and feeding but can't decide if this is worth the money and not sure when to feed and how much to feed. I haven't tesed my PH yet but I am planning on getting one this weekend so with my old soil should I go ahead and feed?
I don't feed mine anything but water until they're at least a month - month and a half old. By then they should have about 4 to 6 branches. Somewhere after 4 branches, around 1 1/2 - 2 months, start watching for preflowers to determine sex. Then spend your money on the females.