Related: How To Plant Carrots
In cold climates, purple carrots can be left in the ground even through winter, beneath a deep mulch of hay or straw. In warm climates, however, purple carrots left in the ground are vulnerable to insect pests, so it is best to make successional sowings and harvest carrots as they mature. Store purple carrots in the refrigerator, in a plastic bag, with the foliage trimmed off. Don't store purple carrots near apples or pears, which give off gases that turn carrots bitter.
Related: Veggies Of A Different Color
Purple Haze carrots are sweet and delicious raw or cooked, but they lose much of their gorgeous color when boiled. For that reason, serve them fresh from the garden whenever possible. Slice your purple carrots into medallions, mix with other colorful varieties, and serve with dill dip, or grate and toss with white cabbage and orange carrots for a colorful coleslaw. Coat whole or sliced carrots with a little olive oil, sprinkle with fresh or dried thyme, and roast until soft, which enhances their inherent sweetness. For a sweet side dish, sauté purple carrots lightly in olive oil and serve them with a maple glaze; for a savory twist, add yellow or purple onions that have been sautéed until soft.