Im in VA mtns zone 6a-6b depending on how old of a map you look at. I plant my cool season crops (peas, lettuce, spinach,
potatoes, sometimes broccoli and raddishes, onions, garlic, and chives) between March 15th-21st. So yall should be the same time or slightly before.
Progress report:
Potatoes are doing great, peas are 2-3" tall, radishes, lettuce, and spinach, are 1" sprouts, bulbs are 4" sprouts. We got hammered by some HEAVY RAIN over the weekend and I had a wash out of my carrots and broccoli. They will likely need replanting.
FYI - Last frost here isnt until May 15th. (Calling for a dusting of snow tonight). The rest of the garden goes in then.
Your local co-op or state AG dept. will have a planting list that tells you best planting times for all garden crops and expected harvest dates for your area.