Quick Question

At how many weeks does marijuana start producing THC? Sorry if this question doesnt belong here.

It all depends on how you are growing, indoor/ outdoor. If it is indoor its still kinda hard to pinpoint the exact week. When you switch to 12/12 after about a week it will start to produce THC.

i am growing outdoors in Georgia, U.S.A. Fairly lengthy days and rainy.

Im not really an outdoor grower but I do know that a lot of strains are usually ready to harvest around October ish.