March in the Garden
March is a turning point in much of the country, when lengthening days and warming soil signal the start of the growing season. What that means for you depends heavily on where you live, since conditions range from deep snow in the far north to active planting weather across the south. Your local average last spring frost date and your USDA hardiness zone are the two most useful reference points, so look up your frost dates through your local Cooperative Extension office before you plant.
What to plant in March
In colder regions, March is mainly a month for starting seeds indoors under lights, including many long-season crops that need a head start before outdoor conditions settle. In milder southern areas, gardeners can often direct sow cool-season crops such as peas, lettuce, spinach, radishes, and other leafy greens, and set out cold-hardy transplants once the soil is workable. As a general rule, wait until the risk of your last spring frost has passed before moving tender, warm-season plants outdoors, and harden off indoor-grown seedlings gradually before transplanting. Because timing varies so much by location, check the days-to-maturity on your seed packets and count back from your local frost dates rather than relying on the calendar alone.
Garden tasks for March
March is a good time to prepare beds as soon as the soil is dry enough to work, since digging or tilling wet soil can damage its structure. Many gardeners use this month to clean up winter debris, sharpen and service tools, refresh mulch, and finalize their planting plans and seed orders. Late-winter pruning of many dormant trees and shrubs is often done now, though the right timing depends on the specific plant, so consult your local Cooperative Extension for species-specific guidance. If you plan to amend your soil, a soil test through your Extension office can tell you what your beds actually need before you add anything.
Colder regions (zones 3-6)
In colder northern zones, roughly 3 through 6, the ground may still be frozen or snow-covered for much of March, and the last frost is often weeks or months away. Focus on indoor seed starting, planning, and readying equipment rather than outdoor planting, and resist the urge to work soil that is still wet or frozen. Watch your local forecast and frost dates closely, because early-season warm spells are frequently followed by hard freezes.
Warmer regions (zones 8-10)
In warmer southern zones, roughly 8 through 10, March is often an active planting month, with cool-season crops maturing and windows opening for some warm-season crops in the mildest areas. Even so, late cold snaps are still possible, so keep an eye on your local frost dates and be ready to protect tender plants. Consistent watering and early attention to beds pay off as temperatures climb toward summer.
Not sure of your timing? Look up your local frost dates and planting calendar by ZIP.
Timing depends on your local frost dates and USDA hardiness zone; confirm with your local Cooperative Extension office. Page updated Aug 4, 2026.