I don't follow the rules, I grow in a cold basement at temps14c (57f ) to 21c (70f) My humidity in the winter is 20-30%
I use Sunshine #4 & FH nutrients, I don't ph or check my ppms . I use rainwater. Grow in a homebuilt grow room with homebuilt light. 325 watts in a 4x4.
28 days in 12/12 3...