TLC’s March Checklist & Pruning Guide Early in the month, you still have time to plant cool-season vegetable crops. Plants and seeds are available now: Potato | onion | asparagus | beet | broccoli | cabbage | carrot | cauliflower | kohlrabi | lettuce | onion | peas | potato | radish | rhubarb | spinach | swiss chard | turnip This is a great time to plant shade, fruit and nut trees, as well as grapes and other berries. Plant shrubs, perennials and herbs now, but check with you