Corunna 2 NE, MI Frost Dates & Growing Season

The two dates every Corunna 2 NE garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
May 5
~50% chance of frost after
First fall frost
Oct 14
~50% chance of frost before
Growing season
162 days
frost-free stretch
USDA zone
≈ 6a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 20 May 5 May 20
First fall frost Oct 29 Oct 14 Sep 29
Hard freeze (28°F), median last Apr 24 · first Oct 29

Computed from NOAA 1991–2020 climate normals at the CORUNNA 2 NE station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Corunna 2 NE

Computed from Corunna 2 NE's own frost dates. Click any crop for the full zone-6 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Mar 10 – Mar 24 May 12 – May 19
🫑 Peppers Feb 24 – Mar 10 May 19 – May 26
🥬 Lettuce Mar 24 – Apr 7 Apr 7 – Apr 21 Apr 7 – May 5
🫛 Peas Mar 24 – Apr 7
🥕 Carrots Apr 14 – May 5
🥦 Broccoli Mar 17 – Mar 31 Apr 14 – Apr 28
🥬 Kale Mar 24 – Apr 7 Apr 7 – Apr 21 Apr 7 – Apr 21
🥒 Cucumbers Apr 7 – Apr 14 May 12 – May 19 May 12 – May 19
🥒 Zucchini Apr 7 – Apr 14 May 12 – May 19 May 12 – May 19
🫘 Green Beans (Bush) May 12 – May 19
🌽 Sweet Corn May 12 – May 19
🌿 Basil Mar 24 – Apr 7 May 12 – May 19 May 19 – May 26
🧄 Garlic Fall: Sep 2 – Sep 30

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Corunna 2 NE's dates automatically after a lookup.

Reading the season in Corunna 2 NE

Roughly 162 frost-free days gives Corunna 2 NE gardeners room for nearly every common vegetable. Warm-season crops go out after May 5; a fall garden sown in late summer matures comfortably before the Oct 14 frost.

Frequently asked questions

When is the last frost in Corunna 2 NE, MI?

The average last spring frost in Corunna 2 NE is around May 5, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Corunna 2 NE, MI?

The average first fall frost in Corunna 2 NE arrives around Oct 14. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Corunna 2 NE?

About 162 frost-free days on average, from May 5 to Oct 14. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Corunna 2 NE in?

USDA zone 6a on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.