March garden to‑dos
March is the month to prune flowering shrubs, clean debris, prep soil and start seeds indoors—four core tasks that set up a strong spring Gardening Know How. Plant classic spring bulbs now — daffodils, tulips and hyacinths — and follow regional tips like magnolia care and watching narcissus shoots for localized timing Better Homes & Gardens x.com.
March planting of spring bulbs only works if those bulbs already had a cold spell: most tulips and narcissus need about 12–16 weeks of chilling at roughly 35–45°F to bloom if planted in spring, or you must buy commercially pre‑chilled stock. biologyinsights.com Bury daffodil bulbs about 6 inches deep and tulips 6–8 inches deep to encourage root establishment before warm weather, and purchase pre‑chilled or refrigerate bulbs immediately after purchase to preserve the vernalization period. johnnyseeds.com Warm‑season vegetables follow strict indoor schedules: sow tomato seeds 6–8 weeks before your average last frost date and germinate them at 75–90°F for best results, according to Cornell Cooperative Extension. gardening.cals.cornell.edu Peppers require a longer head start—begin seeds 8–10 weeks (up to 12 weeks for very hot cultivars) before the last frost and transplant only after nighttime lows stay above about 50–60°F, per University of Maryland and Minnesota extension guidance. extension.umd.edu Prune spring‑flowering shrubs such as forsythia, lilac and azalea immediately after bloom because they set next season’s flowers on last year’s wood, while summer‑bloomers like butterfly bush and panicle hydrangea are best pruned in early spring. extension.psu.edu Soil work in March should start with a lab soil test every ~3 years to get pH and fertilizer recommendations, then amend beds by topdressing with compost (commonly 2–3 inches) or incorporating one inch of organic matter into the top 6 inches if tests show low organic matter. extension.illinois.edu
