My new potting mix is a 5::2::1 pine fine::perlite::peat mix. It’s really doing the trick for me… I’m in the midst of repotting all my plants—rinsing off the roots, trimming them aggressively, and moving them into this new mix. The results are impressive. I just bought a Siphon Mixer - Fertilizer Injector off of eBay ($17 delivered!) that will allow me to fertilize every time I water.