Logan, UT Frost Dates & Growing Season

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

Last spring frost
May 8
~50% chance of frost after
First fall frost
Oct 2
~50% chance of frost before
Growing season
147 days
frost-free stretch
USDA zone
6a
2023 hardiness map
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 25 May 8 Jun 2
First fall frost Oct 15 Oct 2 Sep 18
Hard freeze (28°F), median last Apr 23 · first Oct 14

Computed from NOAA 1991–2020 climate normals at the Logan Radio Kvnu station (2 km from central Logan). "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 Logan

Computed from Logan'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 13 – Mar 27 May 15 – May 22
🫑 Peppers Feb 27 – Mar 13 May 22 – May 29
🥬 Lettuce Mar 27 – Apr 10 Apr 10 – Apr 24 Apr 10 – May 8
🫛 Peas Mar 27 – Apr 10
🥕 Carrots Apr 17 – May 8
🥦 Broccoli Mar 20 – Apr 3 Apr 17 – May 1
🥬 Kale Mar 27 – Apr 10 Apr 10 – Apr 24 Apr 10 – Apr 24
🥒 Cucumbers Apr 10 – Apr 17 May 15 – May 22 May 15 – May 22
🥒 Zucchini Apr 10 – Apr 17 May 15 – May 22 May 15 – May 22
🫘 Green Beans (Bush) May 15 – May 22
🌽 Sweet Corn May 15 – May 22
🌿 Basil Mar 27 – Apr 10 May 15 – May 22 May 22 – May 29
🧄 Garlic Fall: Aug 21 – Sep 18

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 Logan's dates automatically after a lookup.

Reading the season in Logan

At about 147 frost-free days, Logan rewards efficiency: start warm-season crops indoors, favor short-season varieties, and lean on cold-tolerant crops — peas, kale, roots — that shrug off the shoulder-season frosts on either end.

Frequently asked questions

When is the last frost in Logan, UT?

The average last spring frost in Logan is around May 8, 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 Logan, UT?

The average first fall frost in Logan arrives around Oct 2. 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 Logan?

About 147 frost-free days on average, from May 8 to Oct 2. That favors short-season varieties and transplants for warm-season crops, with cool-season vegetables doing the heavy lifting in spring and fall.

What USDA zone is Logan 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.