When to plant in Princeton, TX
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Princeton, Texas — is derived from the closest NOAA station with complete climate normals.
In zone 8b, Princeton supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average last spring frost in Princeton is now 6 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
MCKINNEY MUNI AP · 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 Princeton’s own odds, recorded at MCKINNEY MUNI AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 22 | Apr 3 | Mar 14 | Oct 19 | Nov 1 | Nov 18 |
| 32°F | Apr 7 | Mar 18 | Feb 28 | Oct 27 | Nov 11 | Dec 1 |
| 28°F | Mar 22 | Mar 4 | Feb 9 | Nov 6 | Nov 24 | Dec 14 |
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 Princeton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 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.
Princeton planting FAQ
When is the last spring frost in Princeton, TX?
Plan for the last spring frost in Princeton around March 18 (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 Princeton, TX?
In Princeton, the first 32°F freeze of fall lands around November 11 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Princeton in?
Princeton is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Princeton?
Princeton has about 238 frost-free days — a long growing season — between the average last spring frost (March 18) and first fall frost (November 11).
When should I plant tomatoes in Princeton?
For Princeton, sow tomatoes indoors about January 21–February 4 and move the seedlings out around March 25, after the last spring frost.
Never miss a window in Princeton
An email when it’s time to start seeds, transplant, and sow — timed to Princeton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at MCKINNEY MUNI AP, 8 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 Princeton, TX — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053914. Retrieved from https://blissgarden.com/texas/princeton.