Here’s a zone-by-zone to-do list for the month of March.
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March To-Do List For Zone 6
If you've had a mild winter, look for hosta shoots poking up through the soil. Dig up clumps that need to be divided, split them apart, and replant them. Water generously.
Free the foliage from spring-blooming bulbs that are tangled in mulch.
If the weather's mild, plant roses, trees, and shrubs.
Move cool-loving broccoli, cabbage, and cauliflower outdoors to a coldframe or protected spot.
Start seeds of tomatoes, peppers, eggplants, perennials, and annual flowers indoors under lights.
As soon the garden soil is workable, plant peas, potatoes, sweet peas (Lathyrus odoratus), poppies (Papaver spp.), rocket larkspur (Consolida ajacis), and mignonette (Reseda odorata).
If there's no snow, top-dress the lawn with compost. Fill in low spots and reseed.