Coop Extension Service

Cooperative Extension Service by State-Check When to Plant
Below are to the extension service, by state. This will be a big help making it easy to look up what/when to plant for best results by your zone.  We have tried to get the links direct to the gardening area, but some you may have to search or click their link for your county.
Alabama Hawaii Massachusetts New Mexico South Dakota
Alaska Idaho Michigan New York Tennessee
Arizona Illinois Minnesota North Carolina Texas
Arkansas Indiana Mississippi North Dakota Utah
California Iowa Missouri Ohio Vermont
Colorado Kansas Montana Oklahoma Virginia
Connecticut Kentucky Nebraska Oregon Washington
Delaware Louisiana Nevada Pennsylvania West Virginia
Florida Maine New Hampshire Rhode Island Wisconsin
Hardy Cool-Season Vegetables
Plant these as soon as the ground can be worked in the spring, or plant in summer for the fall garden
Broccoli Collards Peas Brussels Sprout Kale
Radishes Cabbage Kohlrabi Mustard Spinach
Turnips Onions
Half-Hardy Cool-Season Vegetables
Plant these near the average date of the last killing frost, or plant in summer for the fall garden.
Beets Endive Potatoes Carrots Cauliflower
Celery Parsnips Swiss chard Lettuce
Tender Warm-Season Vegetables
Plant these after all danger of frost
Snap Beans Sweet Corn Black-eyed-Peas Tomatoes
Very Tender Warm-Season Vegetables
Plant these after all danger of frost and when temperatures are consistently warm.
Cucumber Okra  Squash Eggplant Bell Pepper
Pumpkin Lima Bean Chile's Sweet Potato Cantaloupe