Instead of a community garden, perhaps you could find a single person or small business/farmer looking to lease a parcel to farm, grow flowers or whatever. Cut flowers are a good addition to veggie stand, by the way, something you could do yourself, both spring bulbs like tulips and summer flowers as well.
Maybe specialize your veggie stand offering with heirloom varieties or some uncommon types of squash, for example, as an added draw, something to “upsell” your stand. Provide a few recipes to help buyers get started with them.
Find a beekeeper to put hives on your farm then sell their honey at your stand.
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