Let's see those '10 gardens

I have lots of compost, worm castings, mulch, etc. My garden used to always get this stuff added every year. I filled the raised boxes with the mixed stuff from a landscape supply. I am hesitant to add ashes because how much it will raise the already borderline high ph. Greensand sounds like a good way. We have kelp meal around here as an organic fertilizer that is high in K but it is also high in $.