When to plant in Prosper, TX
USDA Zone 8bProsper, Texas frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Prosper enjoys a long ~243-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Prosper's nearest full-normals station sits about 21 km out, so treat these as a close estimate — local microclimate can nudge your first and last frost. Zone 8b means many perennials and even some tender shrubs overwinter in Prosper, while your frost dates still decide when annuals go out.
The average last spring frost in Prosper is now 11 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MCKINNEY MUNICIPAL AIRPORT · 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 Prosper’s own odds, recorded at MCKINNEY MUNICIPAL AIRPORT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 19 | Mar 31 | Mar 9 | Oct 20 | Nov 3 | Nov 24 |
| 32°F | Apr 5 | Mar 17 | Feb 27 | Oct 27 | Nov 15 | Dec 5 |
| 28°F | Mar 24 | Mar 4 | Feb 15 | Nov 6 | Nov 30 | Dec 23 |
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 Prosper, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Prosper planting FAQ
When is the last spring frost in Prosper, TX?
Plan for the last spring frost in Prosper around March 17 (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 Prosper, TX?
Expect Prosper's first fall frost near November 15 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Prosper in?
Prosper is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Prosper?
There are roughly 243 frost-free days in Prosper (a long growing season), running from the average last frost around March 17 to the first fall frost near November 15.
When should I plant tomatoes in Prosper?
In Prosper, start tomato seeds indoors around January 20–February 3, then transplant seedlings outdoors around March 24 once the danger of frost has passed.
Never miss a window in Prosper
An email when it’s time to start seeds, transplant, and sow — timed to Prosper’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Celina · 9 km
- Frisco · 10 km
- Little Elm · 12 km
- McKinney · 14 km
- The Colony · 19 km
- Allen · 19 km
- Fairview · 21 km
- Plano · 22 km
Frost dates recorded at MCKINNEY MUNICIPAL AIRPORT, 21 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 Prosper, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00415766. Retrieved from https://blissgarden.com/texas/prosper.