Plant corn, snap beans, summer squash, and New Zealand spinach in mid-May.
Thin carrots, beets, and late lettuce.
Harvest green onions, lettuce, and radishes. Any of the mesclun mix or cut-and-come-again lettuces can be harvested to a few inches three separate times before the plants have exhausted themselves.
Harvest mature asparagus and rhubarb.
Spread several inches of aged compost on vegetable and herb beds, if not done yet.
Remove flowers of June-bearing strawberries as soon as they appear. This is necessary just for the first growing season. The plants will now develop a stronger root system.
Remove flowers for everbearing and day-neutral strawberries as soon as they appear. Flowers that develop after July 1 can be left on the plants to set fruit for later in the season.