Espoma makes a whole range of organic fertilizers, Garden Tone, Tomato Tone, Azalea Tone, Flower Tone, you get the picture, lol! Anyway, it's a pretty well known brand and may be available in your area. Their website says available in the Eastern USA, I am in the Midwest, sort of.
I also use fish emulsion as a in between fertilizer, you just mix with water and spray the foliage every couple weeks. It's also good at deterring rabbits, they don't like the smell that much. Good Luck!!