Crab Meal is great for introducing Chitin and Calcium to your plants, I typically mix a small amount in with some worm castings as a veg top dress if the plants ask for it.
4-4-4 is a good all around fertilizer, and is very affordable. It does use feather meal as one of its main ingredients though, there are some debates in the organic community on the use of feather meal. Feather meal can be derived from non organic slaughterhouses and still be marketed for organic gardening.
7 months ago