I have tried making a few different types of foliar feeds for both fruits and vegetables. I have had some success making fish amino acid (FAA) as guided by Natural Farming resources but it seems only useful for greenhouse stage plants or semi-perennials (a small field trial showed yield increased for roselle at 1:500 dilution FAA).
I have also seen a farmer in East Africa soak worm-processed manure in water and use it on his plants (see image below). Has anyone seen this before? Has it proven effective for you? If so, at wat ratio of manure:water and what dilution for the spray?
Has anyone else had success with other homemade foliar fertilizer recipes?