Any cubs or societies?

I'm doing some research about real and virtual clubs/communities o growers of fruit and veg for a university project. I'd be reall grateful if you could let me know of any clubs/societies/association for edible gardening enthusiasts.
The project looks into how many enthusiasts there are in the U compared to other countries and how the growers keep in touch with eac other and share tips and advice and how they use competitions as a wa of socialising.
I'd be really grateful for any pointers.
-- emielou

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