Succession Sow for Steady Harvests. With lettuce, snap peas, sweet corn and other vegetables that mature like clockwork, make two sowings three weeks apart to lengthen your harvest season. Or, plant two varieties with different maturation times on the same day.
Use Seedlings to Run Tight Successions. Let’s say it’s June, and you want to replace bolting lettuce with summer squash. If you had thought ahead and started squash seeds in containers, you could pull out the lettuce, add some compost and plug in the squash, all in the same afternoon. Using seedlings tightens up the timing of succession planting (sometimes called “relay planting”), whether you’re replacing spring spinach with fall broccoli or following cucumbers with fall snow peas sprouted indoors.