I used to be a vendor in a Farmer's Market [today I only sell to a Buyer's Club] where I saw other vendors come in with a truck or box-van filled with flowering plants that they had forced in their heated-greenhouses, in late-February / Mid-March. Snow and ice covering the parking lot that we are standing in. Customers would be all excited to buy tomato sets and flowering shrubs by the arm load.
Mind you nothing can safely go in the ground before June, but they buy every plant available.
It amazes me that tomato sets and flowers set on a snowbank would sell the way they do.
I asked the other vendors about it. To me it seemed unethical, to sell plants while we were still in snow. The attitude was that the city customers would buy live plants and kill them; buy live plants again, and again; until finally the vendors shifted to selling vegetables. It is the same customers week after week, they know the vendors by name.