A bit off topic from the video, but here it goes, I typically pulverize eggshells for grit, buffer, and calcium addition to castings and also use diatamcious earth for silica and I hope calcium?. My question is what other sources of calcium can I add to my bin? My plants seem to show calcium deficiency and was just wondering if there was anything else I could be doing to tailor my castings to my plants.
