Planting times for common veggies:
Beets February--July
Beets February--July
Peas February--August, November
Carrots mid Feb--mid July
Broccoli mid-Feb--mid-August
Lettuce mid-Feb--August
Kale March--April, July--August
Zucchini April--June
Pumpkin mid-April--mid-June
Tomatoes May--mid-June
Great sources for on-line seed ordering and inspiration: