It seems to me that, if one intends to grow the plants for food, the best bet is to get the seed stock from a local grower rather than gambling on kitchen scrap.
The local grower should know what grows best in a region.
Even worse, much of the food from the store has been genetically or otherwise modified.
While it is fun to get things for free. The amount paid for the seed stock helps support local growers. Local growers are usually active in the local horticulture community.