Here are a few as a starting point for you. Keep searching.
local Organic berry plants plus fertilizers and soil amendments.
You can also find him at the Farmers Market
About the local growers
Ed Burns in Seymour who provided the samples of the worm castings for the meeting. He normally has a table at the Farmers Market on Saturdays.
Good reference about Organic Fertilizers
SARE - Sustainable Agriculture Research & Education
I discovered this site in a search. The Extension office there put together a huge quantity of web sites on about any subject you might want. And some you don't. The Vegetable Gardening link gets you to the Organic Gardening section. Pick and choose what you want.
A great site for free ebooks on about
This is where I found Organic Gardener's Composting by Steve Solomon