Plano, TX planting zone & frost dates

Plano is in USDA hardiness zone 8b. The last spring frost usually comes around March 7 and the first fall frost around November 21, for a growing season of about 259 days.

USDA hardiness zone8bavg. extreme winter low 15°F to 20°F

Average last spring frostMarch 790% chance of no frost after March 29

Average first fall frostNovember 2110% chance of frost by November 2

Growing season259 daysfrost-free days in an average year

Planting calendar for Plano

Dates are counted from the average last spring frost (March 7) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.

Crop	When
Tomatoes	Start seeds indoors: Jan 10 – Jan 24 Transplant outdoors: Mar 14 – Mar 21
Peppers	Start seeds indoors: Dec 27 – Jan 10 Transplant outdoors: Mar 21 – Mar 28
Eggplant	Start seeds indoors: Dec 27 – Jan 10 Transplant outdoors: Mar 21 – Mar 28
Broccoli	Start seeds indoors: Dec 27 – Jan 10 Transplant outdoors: Feb 7 – Feb 21
Cabbage	Start seeds indoors: Dec 27 – Jan 10 Transplant outdoors: Feb 7 – Feb 21
Onions (sets)	Plant outdoors: Feb 7 – Feb 21
Peas	Sow outdoors: Jan 24 – Feb 7
Spinach	Sow outdoors: Jan 24 – Feb 7
Lettuce	Sow outdoors: Feb 7 – Feb 21
Carrots	Sow outdoors: Feb 7 – Feb 21
Potatoes	Plant outdoors: Feb 7 – Feb 21
Beans	Sow outdoors: Mar 14 – Mar 21
Sweet corn	Sow outdoors: Mar 14 – Mar 21
Cucumbers	Sow outdoors: Mar 14 – Mar 21
Squash & zucchini	Sow outdoors: Mar 14 – Mar 21
Basil	Start seeds indoors: Jan 24 – Feb 7 Transplant outdoors: Mar 14 – Mar 21

Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 26 (8 weeks before the average first fall frost on Nov 21).

Frost risk in detail

	90% chance	50% chance	10% chance
Last 32°F frost in spring is after	Feb 18	Mar 7	Mar 29
First 32°F frost in fall is before	Dec 9	Nov 21	Nov 2

How to read it: in spring there is a 10% chance of a frost after March 29, so that is a safe date for tender plants. In fall there is a 10% chance of frost before November 2. A hard freeze (28°F) usually ends around February 24.

Hardiness zone by ZIP code in Plano

75023 zone 8b
75024 zone 8b
75025 zone 8b
75026 zone 8b
75074 zone 8b
75075 zone 8b
75086 zone 8b
75093 zone 8b
75094 zone 8b

Nearby cities

Richardson zone 8b, last frost Mar 7
Murphy zone 8b, last frost Mar 10
Allen zone 8b, last frost Mar 18
Sachse zone 8b, last frost Mar 10
Garland zone 8b, last frost Mar 7
Addison zone 8b, last frost Mar 7
Fairview zone 8b, last frost Mar 18
Wylie zone 8b, last frost Mar 10

All cities in Texas → · Other zone 8b cities →

Questions

What growing zone is Plano, TX?

Plano is in USDA Plant Hardiness Zone 8b (average extreme winter low 15°F to 20°F), according to the USDA 2023 map.

When is the last frost in Plano?

The average last spring frost (32°F) in Plano is March 7. There is still a 10% chance of frost until March 29.

When can I plant tomatoes in Plano?

Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 14 – Mar 21. Start seeds indoors 6–8 weeks before the last frost.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Richardson, TX (USC00417588), 4.9 km (3.0 mi) from the city center, elevation 207 m, based on 11 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.