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What to plant in April in Zone 4b

In April, Zone 4b gardeners can start indoors, transplant outdoors, direct-sow — 25 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

TomatoesStart indoorsEggplantStart indoorsBasilStart indoorsCucumbersStart indoorsSummer Squash & ZucchiniStart indoorsWinter SquashStart indoorsPumpkinsStart indoorsMelonsStart indoorsOkraStart indoors

Transplant outdoors

BroccoliTransplant outdoorsCabbageTransplant outdoorsCauliflowerTransplant outdoorsBrussels SproutsTransplant outdoorsKaleTransplant outdoorsLettuceTransplant outdoorsOnionsTransplant outdoorsLeeksTransplant outdoorsSwiss ChardTransplant outdoorsParsleyTransplant outdoors

Direct-sow

LettuceDirect-sowSpinachDirect-sowSwiss ChardDirect-sowRadishesDirect-sowTurnipsDirect-sowBeetsDirect-sowPeasDirect-sowPotatoesDirect-sow

← March   May →

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