What to plant when

From John Starnes:  "A general rule that has worked well for me here since the '70s is that if you eat the leaves, the above-ground portion of the plant, and its roots (mustard, radish, turnip, carrots, broccoli, collards, etc.) those are usually cool-weather crops.  Sweeet potatoes are an exception; they need summer conditions.
       If you eat the seed-containing portion of the plant, the fruit (hot peppers, eggplant, okra, calabaza pumpkins, cucuzzii (what the heck!) those are generally hot-weather crops.  Exceptions:  tomatoes, bell peppers and sugar snap peas which do best in cool weather.
    

This from the man on whose advice I planted those man-eating roses in my backyard. Marty couldn't even tell they were roses!