Mathis 4 SSW, TX Frost Dates & Growing Season

The two dates every Mathis 4 SSW garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
Jan 31
~50% chance of frost after
First fall frost
Dec 23
~50% chance of frost before
Growing season
326 days
frost-free stretch
USDA zone
≈ 9b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Dec 22 Jan 31 Mar 4
First fall frost Jan 28 Dec 23 Nov 28
Hard freeze (28°F), median last Jan 13 · first Jan 2

Computed from NOAA 1991–2020 climate normals at the MATHIS 4 SSW 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 Mathis 4 SSW

Computed from Mathis 4 SSW's own frost dates. Click any crop for the full zone-9 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Dec 6 – Dec 20 Feb 7 – Feb 14
🫑 Peppers Nov 22 – Dec 6 Feb 14 – Feb 21
🥬 Lettuce Dec 20 – Jan 3 Jan 3 – Jan 17 Jan 3 – Jan 31
🫛 Peas Dec 20 – Jan 3
🥕 Carrots Jan 10 – Jan 31
🥦 Broccoli Dec 13 – Dec 27 Jan 10 – Jan 24
🥬 Kale Dec 20 – Jan 3 Jan 3 – Jan 17 Jan 3 – Jan 17
🥒 Cucumbers Jan 3 – Jan 10 Feb 7 – Feb 14 Feb 7 – Feb 14
🥒 Zucchini Jan 3 – Jan 10 Feb 7 – Feb 14 Feb 7 – Feb 14
🫘 Green Beans (Bush) Feb 7 – Feb 14
🌽 Sweet Corn Feb 7 – Feb 14
🌿 Basil Dec 20 – Jan 3 Feb 7 – Feb 14 Feb 14 – Feb 21
🧄 Garlic Fall: Nov 11 – Dec 9

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 Mathis 4 SSW's dates automatically after a lookup.

Reading the season in Mathis 4 SSW

With roughly 326 frost-free days, Mathis 4 SSW gardens fit long-season crops — melons, winter squash, sweet potatoes — with room left for spring and fall rounds of greens and roots. The first frost around Dec 23 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Mathis 4 SSW, TX?

The average last spring frost in Mathis 4 SSW is around Jan 31, 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 Mathis 4 SSW, TX?

The average first fall frost in Mathis 4 SSW arrives around Dec 23. 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 Mathis 4 SSW?

About 326 frost-free days on average, from Jan 31 to Dec 23. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Mathis 4 SSW in?

USDA zone 9b 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.