When to plant in Colleyville, TX
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Colleyville, Texas — is derived from the closest NOAA station with complete climate normals.
With about 248 frost-free days, Colleyville supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Zone 8b means many perennials and even some tender shrubs overwinter in Colleyville, while your frost dates still decide when annuals go out.
Frost probability
GRAPEVINE DAM · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Colleyville’s own odds, recorded at GRAPEVINE DAM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 15 | Mar 29 | Mar 8 | Oct 26 | Nov 7 | Nov 23 |
| 32°F | Apr 3 | Mar 14 | Feb 23 | Nov 2 | Nov 17 | Dec 4 |
| 28°F | Mar 20 | Mar 1 | Feb 4 | Nov 9 | Nov 29 | Dec 20 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Colleyville, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Colleyville planting FAQ
When is the last spring frost in Colleyville, TX?
Colleyville's average last spring frost falls near March 14 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Colleyville, TX?
Expect Colleyville's first fall frost near November 17 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Colleyville in?
Colleyville is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Colleyville?
There are roughly 248 frost-free days in Colleyville (a long growing season), running from the average last frost around March 14 to the first fall frost near November 17.
When should I plant tomatoes in Colleyville?
In Colleyville, start tomato seeds indoors around January 17–January 31, then transplant seedlings outdoors around March 21 once the danger of frost has passed.
Never miss a window in Colleyville
An email when it’s time to start seeds, transplant, and sow — timed to Colleyville’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at GRAPEVINE DAM, 11 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Colleyville, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00413691. Retrieved from https://blissgarden.com/texas/colleyville.