Sure, if you don't mind gardening and have space. But at commercial scale? Much harder. Our CSA farm has commercial greenhouses for their tomatoes and cucumber

Sure, if you don't mind gardening and have space. But at commercial scale? Much harder. Our CSA farm has commercial greenhouses for their tomatoes and cucumbers, so they can have a good supply of those even when weather becomes a problem. They seem to build a new greenhouse every years. But scale? That's a handful, a little ten acre farm selling directly to consumers.