Very hardy vegetables can be planted four to six weeks before the frost-free date in the spring. Potato tubers and onion sets can be planted. Asparagus, broccoli and cabbage can be planted as transplants. Collards, spinach, peas, lettuce and turnips can be planted from seed.
Frost tolerant vegetables can be planted two to three weeks before the frost-free date. Cauliflower can be planted as a transplant. Carrots, mustard, parsnip, beets and radishes can be planted from seed.
Tender vegetables can be planted on or after the frost-free date. Beans, sweet corn and summer squash can be planted from seed. Tomatoes transplants can be planted.
Warm-loving vegetables can be planted one to two weeks after the frost-free date. Warm loving vegetables need warm temperatures and warm soil before planting.
Vining crops like watermelon, cucumbers, pumpkins and cantaloupe can be planted. Pepper, eggplant and sweet potatoes should also be planted.