March 2, 2026
March Garden Checklist for Massachusetts Gardeners
March marks the turning point. The ground begins to thaw, snow recedes, and gardening becomes hands-on again. While it’s still too early for most planting, this month is all about preparation, cleanup, and the first steps back outdoors.
Clean Up Garden Beds as Soon as Temperatures Allow
Hold off on major cleanup until daytime temperatures reliably reach the 50s—this protects overwintering pollinators. Once conditions are safe, remove matted leaves, cut back spent perennial stems, and start shaping beds for early planting.
Apply Dormant Oil to Trees and Shrubs
Early March—before buds break—is a perfect window to apply horticultural oil to reduce overwintering pest populations on fruit trees, roses, and certain ornamentals. Choose a mild, dry day for best results.
Top Off Mulch and Prepare Soil
As soil becomes workable, add compost to vegetable beds and lightly fluff existing mulch layers. Avoid turning soil when it’s still wet; working soggy earth can lead to compaction that lasts all season.
Start More Seeds Indoors
This is the month to begin tomatoes, peppers, annual flowers, and warm-season veggies you plan to transplant after frost. Keep lights close to seedlings and adjust as they grow to prevent stretching. Check out our how-to guide on sowing indoors in New England to get you started!
Divide Perennials That Bloom in Summer and Fall
If the soil has thawed enough, established clumps of daylilies, hosta, and ornamental grasses can be lifted and divided. This renews plant vigor and gives you more plants for other spots in the garden. Let Nancy from our Falmouth location teach your how!
Inspect Hardscapes and Outdoor Tools
Look for frost heaving around raised beds, walls, and stepping stones. Check hoses, nozzles, plant supports, and irrigation supplies so everything is ready when planting begins.
Plan Your First Early-Spring Plantings
Cool-season veggies like peas, spinach, arugula, and radishes can often go into the ground late in the month if soil conditions are right. Keep an eye on long-range forecasts and be ready to protect young seedlings from chilly nights.