When to plant in Glenn Heights, TX
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Glenn Heights, Texas — all computed from Glenn Heights's nearest NOAA weather station.
A generous ~245-day season lets Glenn Heights gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 8b means many perennials and even some tender shrubs overwinter in Glenn Heights, while your frost dates still decide when annuals go out.
Frost probability
WAXAHACHIE · 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 Glenn Heights’s own odds, recorded at WAXAHACHIE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 15 | Mar 30 | Mar 9 | Oct 24 | Nov 7 | Nov 24 |
| 32°F | Apr 3 | Mar 16 | Feb 26 | Oct 31 | Nov 16 | Dec 5 |
| 28°F | Mar 20 | Mar 3 | Feb 9 | Nov 8 | Nov 29 | Dec 19 |
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 Glenn Heights, 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.
Glenn Heights planting FAQ
When is the last spring frost in Glenn Heights, TX?
Plan for the last spring frost in Glenn Heights around March 16 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Glenn Heights, TX?
Expect Glenn Heights's first fall frost near November 16 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Glenn Heights in?
Glenn Heights is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Glenn Heights?
There are roughly 245 frost-free days in Glenn Heights (a long growing season), running from the average last frost around March 16 to the first fall frost near November 16.
When should I plant tomatoes in Glenn Heights?
In Glenn Heights, start tomato seeds indoors around January 19–February 2, then transplant seedlings outdoors around March 23 once the danger of frost has passed.
Never miss a window in Glenn Heights
An email when it’s time to start seeds, transplant, and sow — timed to Glenn Heights’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- DeSoto · 5 km
- Red Oak · 8 km
- Lancaster · 9 km
- Cedar Hill · 10 km
- Duncanville · 12 km
- Midlothian · 16 km
- Waxahachie · 17 km
- Grand Prairie · 21 km
Frost dates recorded at WAXAHACHIE, 14 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 Glenn Heights, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00419522. Retrieved from https://blissgarden.com/texas/glenn-heights.