Brenham, TX Frost Dates & Growing Season

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

Last spring frost
Mar 2
~50% chance of frost after
First fall frost
Nov 30
~50% chance of frost before
Growing season
273 days
frost-free stretch
USDA zone
≈ 9a
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Jan 31 Mar 2 Mar 20
First fall frost Dec 23 Nov 30 Nov 8
Hard freeze (28°F), median last Feb 10 · first Dec 18

Computed from NOAA 1991–2020 climate normals at the BRENHAM 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 Brenham

Computed from Brenham'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 Jan 5 – Jan 19 Mar 9 – Mar 16
🫑 Peppers Dec 22 – Jan 5 Mar 16 – Mar 23
🥬 Lettuce Jan 19 – Feb 2 Feb 2 – Feb 16 Feb 2 – Mar 2
🫛 Peas Jan 19 – Feb 2
🥕 Carrots Feb 9 – Mar 2
🥦 Broccoli Jan 12 – Jan 26 Feb 9 – Feb 23
🥬 Kale Jan 19 – Feb 2 Feb 2 – Feb 16 Feb 2 – Feb 16
🥒 Cucumbers Feb 2 – Feb 9 Mar 9 – Mar 16 Mar 9 – Mar 16
🥒 Zucchini Feb 2 – Feb 9 Mar 9 – Mar 16 Mar 9 – Mar 16
🫘 Green Beans (Bush) Mar 9 – Mar 16
🌽 Sweet Corn Mar 9 – Mar 16
🌿 Basil Jan 19 – Feb 2 Mar 9 – Mar 16 Mar 16 – Mar 23
🧄 Garlic Fall: Oct 19 – Nov 16

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 Brenham's dates automatically after a lookup.

Reading the season in Brenham

With roughly 273 frost-free days, Brenham 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 Nov 30 is late enough that fall planting is a full second season, not an afterthought.

Frequently asked questions

When is the last frost in Brenham, TX?

The average last spring frost in Brenham is around Mar 2, 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 Brenham, TX?

The average first fall frost in Brenham arrives around Nov 30. 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 Brenham?

About 273 frost-free days on average, from Mar 2 to Nov 30. That comfortably fits long-season crops like melons and winter squash, plus spring and fall plantings of cool-season vegetables.

What USDA zone is Brenham in?

USDA zone 9a 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.