Frost Dates for Amarillo, TX 79121

Amarillo has 14 ZIP codes. The Amarillo, TX frost page lists all of them with their dates.

Last spring frost April 13 · First fall frost October 20 · 190 frost-free days · USDA Zone 7a

Frost probability for 79121

Frost10%50%90%
Spring (last frost)April 28April 13March 30
Fall (first frost)October 3October 20November 7

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (21.6 km away); the 50% date is the median year.

Month by month in Amarillo

MonthWhat to do
JanuaryPlan your garden layout and order seeds. Research varieties suited to your frost dates.
FebruaryStart peppers and eggplant indoors 8–10 weeks before your last frost (around April 13). Start tomatoes about two weeks later, 6–8 weeks before last frost.
MarchStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
AprilLast frost around April 13. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
MayFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
JuneSuccession plant lettuce and greens. Keep beds weeded and watered consistently.
JulyHarvest regularly to encourage production. Monitor for pests and disease.
AugustMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
SeptemberFirst fall frost approaching (around October 20). Transplant fall brassicas. Sow spinach, arugula, and radishes.
OctoberFirst frost around October 20. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
NovemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.
DecemberClean up spent plants. Add compost to beds. Rest, review, and plan next year's garden.

What grows in a 190-day season

Frequently Asked Questions

What is the last frost date for Amarillo, TX (ZIP 79121)?

The median last spring frost date for Amarillo, TX (ZIP code 79121) is around April 13. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in Amarillo, TX?

The median first fall frost date for Amarillo, TX is around October 20. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in Amarillo, TX?

The frost-free growing season in Amarillo is about 190 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Amarillo, TX?

Based on frost date patterns, Amarillo falls approximately in 7a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Amarillo, TX?

Start tomato seeds indoors 6–8 weeks before your last frost date (around April 13). For Amarillo, that's roughly February 17 to March 2. Transplant outdoors 1–2 weeks after your last frost.

Nearby and related