Growli

USDA hardiness zone

Zone 3-40 to -30°F

Northern Minnesota, North Dakota, interior Alaska · 110-day growing season

What grows in Zone 3

Zone 3 suits the following plants based on temperature tolerance and growing-season length:

Climate notes for Zone 3

Frost-tender vegetables need row covers and short-season varieties. Heat-loving crops (peppers, eggplant) require greenhouses or season extension.

Frost dates and timing

Average last spring frostlate May
Average first fall frostearly September
Growing season length~110 days
Temperature range (F)-40 to -30°F
Temperature range (C)-40 to -34°C

These are zone-wide averages. Local microclimates (south-facing slopes, urban heat, lakeside warmth) can shift dates by 1-2 weeks within the same zone.

Source and methodology

Temperature ranges from the USDA Plant Hardiness Zone Map (2023). Frost-date averages from NOAA Climate Data Online national averages within each zone. Plant recommendations curated by the Growli editorial team from US extension service references.

What to plant in Zone 3

Crop-by-crop sowing, transplant, and harvest dates for zone 3:

Common questions

What can I plant in USDA Zone 3?

Zone 3 suits Apple (Honeycrisp, Haralson), Plum (Mount Royal), Sour cherry, Currants, Strawberries, Asparagus, and more, based on its 110-day growing season and -40 to -30°F average minimum temperatures.

When is the last frost in Zone 3?

The average last spring frost in Zone 3 passes around late May, and the first fall frost arrives around early September. Wait until after the last frost date before planting tender crops outdoors.

How long is the growing season in Zone 3?

Zone 3 has roughly 110 frost-free growing days between the average last spring frost (late May) and the first fall frost (early September).

What is the temperature range of USDA Zone 3?

USDA Zone 3 is defined by average annual minimum temperatures of -40 to -30°F (-40 to -34°C).

When can I start planting in Zone 3?

Hardy cool-season crops can go outdoors a few weeks before the last frost (late May); tender crops should wait until 1–2 weeks after it. Start warm-season seeds indoors about 6–8 weeks before late May.

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