Zone 3b
Extreme cold: -35°F to -30°F
This zone has a growing season of 90-120 days, with the last spring frost around May 25 and the first fall frost around September 10.
Growing Season
90-120 days
Last Spring Frost
May 25
First Fall Frost
September 10
States in Zone 3b
AlaskaMinnesotaMontanaNorth Dakota
Monthly Planting Guide
Spring
May
- •Start seeds indoors
- •Prepare garden beds
June
- •Plant cold-hardy seedlings
- •Direct sow quick crops
July
- •Plant warm-season crops
- •Monitor for frost
Summer
June
- •Use row covers
- •Water regularly
- •Monitor growth
July
- •Continue harvesting
- •Protect from heat
- •Succession plant
August
- •Harvest remaining crops
- •Clean up garden
- •Plan for next year
Fall
September
- •Final harvest
- •Clean up garden
- •Add compost
October
- •Plant garlic
- •Mulch beds
- •Order seeds
November
- •Review season
- •Plan improvements
- •Maintain tools
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