March Vegetable Gardening Tips 

By March 28, 2025Garden Tips

By Ira Wallace of Southern Exposure Seed Exchange and the author of The Timber Press Guide to Vegetable Gardening in the Southeast and Grow Great Vegetables in Virginia

In a sunny south facing window, your greenhouse, inside under lights or in a cold frame continue to sow lettuce, scallions, cabbage, collards, and broccoli. In spite of the variable weather we are started some extra early tomatoes, peppers and eggplant  to get a head start on the summer season as soon as the ground starts to warm. We will sow our main crop of nightshades starting April 1. Outside we are direct sowing early radishes, spinach, turnips, Asian greens, carrots and beets in the open garden and covering with spun polyester row cover to speed germination. For quicker germination in cool spring soil presoak beets seeds 1- 4 hours, sow the seeds 1/2″ deep, tamp soil when covered..

When the Forsythia blooms, sow peas, only 1/2″-3/4″ deep (soak or pre-sprout to get a head start).  To support dwarf peas you can sow 1 oat grain per 5 peas.

If you missed the traditional St Patrick’s Day sowing, plant your Irish potatoes as soon as possible after by green chitting. This is the practice of pre-sprouting seed potatoes before planting to encourages early growth. It is widely used abroad, but less known to Americans. Chitting is simple. Spread the seed tubers in boxes or flats one layer deep with the seed end up. Look closely at a seed potato and you will notice one end was attached to the plant. The other end has more eyes from which sprouts emerge. The end with the eye cluster is called the seed end. Place your flats in a warm area (70 degrees) where light is bright but indirect. The warm air stimulates the development of strong sprouts from the bud eye clusters, which, in the presence of light, remain stubby and are not so easily broken off.  Allow 1 to 2 weeks before planting. If you are new to growing potatoes read Lisa’s blog post Sweet potatoes, Potatoes or both for Your Garden?

As soon as your potatoes are in, it’s time to start the main crop of tomatoes indoors.  Tropic is a great tomato for disease resistant, blemish free fruits placing high in a University of Georgia trial.  No Matter how dry or wet it is now your vegetable garden will need an even supply of water all season so plan your irrigation and unfurl your hoses; be certain it’s all in running order because a dry spring or another hot summer may be right around the corner( the last 10 years have been the hottest since Virginia startrd keeping records.  Whenever the soil in your garden is dry enough spread compost and till beds for outdoor planting that will begin in earnest in April..

Check out the Beginners Growing Guide for more tips on preparing, planting and sowing.