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What to plant in March in Zone 4b

In March, Zone 4b gardeners can start indoors, direct-sow — 9 crops have a planting task this month.

Zone 4b frost: last ~05/10, first ~09/30. Dates computed from these and cited extension rules. For your exact town, use the ZIP tool.

Start indoors

PeppersStart indoorsBroccoliStart indoorsCabbageStart indoorsCauliflowerStart indoorsBrussels SproutsStart indoorsKaleStart indoorsLettuceStart indoorsSwiss ChardStart indoors

Direct-sow

PeasDirect-sow

← February   April →

Last verified 2026-07-16. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rules: UNH Extension, Johnny's, UGA Extension.