I use promix hp ( mycorrhiza) and terp tea “ grow “ and “ bloom “ amendments. I use grow amendment mixed with soil during veg, and top dress once. Then transplant just before flower, and mix soil with the bloom amendment, and top dress once during flower. I also use kelp and guano. Amendments tend to lack P and K. Plants will love you for it. I notice my girls give extremely good colors when growing organically compared to bottle feeding. I have clones going right now, and the difference in color is night and day. Don’t think either way will have any influence on the potency though.