Early-season vegetables need the cooler temperatures of spring and early fall to grow well. Once it starts getting hot the middle to end of June, they begin to fade away. Many of them are also sensitive to day length around the summer solstice (June 21) and will begin flowering or bolting to produce seed. Cool-season vegetables include carrots, potatoes, spinach, peas, lettuce, cabbage family vegetables (kale, cabbage, broccoli, cauliflower, Brussels sprouts), cilantro, kohlrabi, beet, radish, turnip, onions and leeks, to name the main ones. Seed-packet information usually notes these as crops that can be planted as soon as the soil can be worked. Given that our soil is finally drying out, we can start planting some seedlings in the next couple of weeks.