Sounds like you have a nice spread planned but you may want to rethink the corn as it needs lots of room, and does best when planted in blocks or grouping, so that rows are 12 to 18 inches apart and each plant is 18in from its neighbor. The crops you mentioned all like warm soil so wait until your night temps are over 50 degrees. Corn is a heavy feeder so in addition to adding compost and plant food to the soil in the spring, fertilize during the growing season as well. Instead of tilling the soil between rows you may want to consider mulching to keep down the weeds as this will increase the quality of the soil over time if you use an organic mulch such as straw or compost. Looks like you'll have a bounty of fresh produce this summer. Keep growing, Marianne Binetti