For planting zone 8, our last average frost date is March 15th. It's time for spring planting!
Plants that tolerate cool weather can be planted outside now and include:
Asparagus, beets, bok choi, broccoli (and other brassicas such as broccolini and Chinese broccoli), cabbage, carrots, collards, lettuce, mustard greens (and any other type of green, leafy vegetable such as spinach), onions, radish, turnip, Swiss chard, white potatoes.
It's getting a bit late, but English peas could still be planted this week. (ideally, English peas are planted as soon as the soil can be worked in the spring.)
Perennial food plants that can be planted now include artichoke, asparagus, strawberries, blueberries, blackberries, raspberries.
Herbs that can be planted now include parsley, thyme, oregano, cilantro.
Seeds that should be started indoors now (under lights or in a sunny window) include tomatoes, peppers, eggplant.