Plant onion starts and potatoes around February 26. Sow the seeds of peas (sugar snap and english) at the same time. If the ground is still frozen, then plant these as soon as the ground thaws.
Do you want to grow tomatoes, peppers, and eggplants? Start these indoors around February 16. Then, around April 22 you should start watching the weather forecast and, as soon as no frost is forecast, go ahead and transplant those into the ground.
Now, for all the summer vegetables like beans, cowpeas, corn, squashes, pumpkins, cucumbers, watermelons, gourds and sunflowers, you should plant those seeds directly into the ground around April 26, or if your soil is still very cold, once the soil is near 60° F in temperature.