Portales, NM Frost Dates & Growing Season

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

Last spring frost
Apr 15
~50% chance of frost after
First fall frost
Oct 26
~50% chance of frost before
Growing season
194 days
frost-free stretch
USDA zone
≈ 7b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Mar 30 Apr 15 Apr 30
First fall frost Nov 7 Oct 26 Oct 12
Hard freeze (28°F), median last Apr 2 · first Nov 4

Computed from NOAA 1991–2020 climate normals at the PORTALES 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 Portales

Computed from Portales's own frost dates. Click any crop for the full zone-7 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Feb 18 – Mar 4 Apr 22 – Apr 29
🫑 Peppers Feb 4 – Feb 18 Apr 29 – May 6
🥬 Lettuce Mar 4 – Mar 18 Mar 18 – Apr 1 Mar 18 – Apr 15
🫛 Peas Mar 4 – Mar 18
🥕 Carrots Mar 25 – Apr 15
🥦 Broccoli Feb 25 – Mar 11 Mar 25 – Apr 8
🥬 Kale Mar 4 – Mar 18 Mar 18 – Apr 1 Mar 18 – Apr 1
🥒 Cucumbers Mar 18 – Mar 25 Apr 22 – Apr 29 Apr 22 – Apr 29
🥒 Zucchini Mar 18 – Mar 25 Apr 22 – Apr 29 Apr 22 – Apr 29
🫘 Green Beans (Bush) Apr 22 – Apr 29
🌽 Sweet Corn Apr 22 – Apr 29
🌿 Basil Mar 4 – Mar 18 Apr 22 – Apr 29 Apr 29 – May 6
🧄 Garlic Fall: Sep 14 – Oct 12

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 Portales's dates automatically after a lookup.

Reading the season in Portales

Roughly 194 frost-free days gives Portales gardeners room for nearly every common vegetable. Warm-season crops go out after Apr 15; a fall garden sown in late summer matures comfortably before the Oct 26 frost.

Frequently asked questions

When is the last frost in Portales, NM?

The average last spring frost in Portales is around Apr 15, 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 Portales, NM?

The average first fall frost in Portales arrives around Oct 26. 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 Portales?

About 194 frost-free days on average, from Apr 15 to Oct 26. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Portales in?

USDA zone 7b 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.