Suggested organic mix ratio in 3 gal. pot

45% coco, 25%casting 30%perlite, 1/2 - 1/3 the strength of recommended top dressing guidelines. water with 6.5-6.8, do not allow runoff. Autos are not as heavy feeders as photoperiods. 4-4-4 70% / 30% 3-9-4 = 3.7-5.5-4 Nitrogon is elemental in number the other two are compounds and not the same strength as elemental. Top dress every 3 weeks, use same formula in veg, think about adding magnesium if it does not have a lot in it. In bloom 50/50 mix, flower 30/70 mix. 4-6-3 50% / 3-9-4 50% - 3.5-7.5-3.5 alternate mix for flower/ would want a bit more potassium though maybe from a seaweed extract. try to match the P and K Good Luck!