Zone 4a
Very cold: -30°F to -25°F
This zone has a growing season of 120-150 days, with the last spring frost around May 15 and the first fall frost around September 25.
Growing Season
120-150 days
Last Spring Frost
May 15
First Fall Frost
September 25
States in Zone 4a
MaineMichiganMinnesotaNew YorkWisconsin
Monthly Planting Guide
Spring
April
- •Start seeds indoors
- •Prepare garden beds
May
- •Plant cold-hardy seedlings
- •Direct sow quick crops
June
- •Plant warm-season crops
- •Monitor weather
Summer
June
- •Water regularly
- •Monitor for pests
- •Succession plant
July
- •Continue harvesting
- •Mulch heavily
- •Protect from heat
August
- •Plant fall crops
- •Start seeds for fall
- •Preserve harvest
Fall
September
- •Harvest remaining crops
- •Clean up garden
- •Plant garlic
October
- •Plant cover crops
- •Protect tender plants
- •Final cleanup
November
- •Review season
- •Plan next year
- •Maintain tools
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