A lot of you have already put in your vegetable gardens. A few sunny warm days often causes an outbreak of planting fever. But for some crops it's still to early to plant, and for others you'll need to replant several times during the season to keep a good harvest coming.
Melons, cucumbers, basil, and most squash need warm soil to live long and prosper. Put them in too early- either as starts or seeds, and the plants will struggle all season. Wait until late May, and you basil will be knee high by the 4th of July.