Maybell, CO Frost Dates & Growing Season

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

Last spring frost
Jun 16
~50% chance of frost after
First fall frost
Sep 9
~50% chance of frost before
Growing season
85 days
frost-free stretch
USDA zone
≈ 5b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost May 31 Jun 16 Jul 1
First fall frost Sep 22 Sep 9 Aug 26
Hard freeze (28°F), median last Jun 1 · first Sep 19

Computed from NOAA 1991–2020 climate normals at the MAYBELL 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 Maybell

Computed from Maybell's own frost dates. Click any crop for the full zone-5 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Apr 21 – May 5 Jun 23 – Jun 30
🫑 Peppers Apr 7 – Apr 21 Jun 30 – Jul 7
🥬 Lettuce May 5 – May 19 May 19 – Jun 2 May 19 – Jun 16
🫛 Peas May 5 – May 19
🥕 Carrots May 26 – Jun 16
🥦 Broccoli Apr 28 – May 12 May 26 – Jun 9
🥬 Kale May 5 – May 19 May 19 – Jun 2 May 19 – Jun 2
🥒 Cucumbers May 19 – May 26 Jun 23 – Jun 30 Jun 23 – Jun 30
🥒 Zucchini May 19 – May 26 Jun 23 – Jun 30 Jun 23 – Jun 30
🫘 Green Beans (Bush) Jun 23 – Jun 30
🌽 Sweet Corn Jun 23 – Jun 30
🌿 Basil May 5 – May 19 Jun 23 – Jun 30 Jun 30 – Jul 7
🧄 Garlic Fall: Jul 29 – Aug 26

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 Maybell's dates automatically after a lookup.

Reading the season in Maybell

At about 85 frost-free days, Maybell 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 Maybell, CO?

The average last spring frost in Maybell is around Jun 16, 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 Maybell, CO?

The average first fall frost in Maybell arrives around Sep 9. 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 Maybell?

About 85 frost-free days on average, from Jun 16 to Sep 9. 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 Maybell in?

USDA zone 5b 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.