I am growing northern lights auto plants outside. They are in pots with promix veg and herb soil and 10 percent worm castings. My question is the promix says it feeds plants for 4 months, should I be fertilizing my plants with any other Fertilizers while they grow or just at flowering or not at all? is the fertilizers in the soil sufficient enough? I did plan to make a worm castings tea to feed them once in awhile. I appreciate any suggestion as I am very new to growing, Thanks!