I have a bunch of citrus and now a bunch of blackberries and was wondering if I could use the same fertilizer for both? It may not be ideal but will it be useless or still worthwhile?
I have a fair bit of the [stuff](https://www.microlifefertilizer.com/product/microlife-citrus-fruit-6-2-4-all-organic-biological-fertilizer/) already – should I buy something else, too?
by schmidtssss