Planning your garden to continually sow the same seeds in succession will ensure you have prolonged harvests. Succession planting is especially effective for fast growing cool weather crops that cannot withstand the hot summer temperatures. The planting strategy also works well for herbs that will quickly go to seed. By replanting the same seeds every few weeks, you will be able to continually harvest the crops when they reach maturity. 

Arugula	Every 2 weeks.
Basil	Every 3-4 weeks.
Beans	Every 2 weeks.
Bok Choy	Every 2-3 weeks.
Cabbage	Every 2-3 weeks.
Carrots	Every 3-4 weeks.
Cilantro	Every 1-2 weeks.
Dill	Every 2 weeks.
Escarole	Every 2 weeks.
Lettuce	Every 2 weeks.
Mustard Greens	Every 2-3 weeks.
Parsley	Every 2 weeks.
Peas	Every 2 weeks.
Radish	Every 2 weeks.
Swiss Chard	Every 2-3 weeks.
Turnips	Every 2 weeks.