Farm stands
4,665 across 53 states. One farm selling what it grows, at its own place. Different from a farmers market: nobody takes a stall at somebody else's farm, so this is somewhere to buy rather than somewhere to sell.
Most markets publish an address and nothing else. USDA gives us where a market is, never its hours, its stalls or whether it wants sellers. Those filters only find the ones an organiser has filled in, which is why there are so few. Run a market?
A filled pin is the card you are pointing at. Pins are the market's own location, from USDA.
States with the most
If a farm here also bakes or preserves under a cottage food registration, that is a home kitchen as well and can have its own listing. List what you make.