When to plant in Conroe, TX
USDA Zone 9aEverything below — frost dates, hardiness zone, and what to plant when in Conroe, Texas — is derived from the closest NOAA station with complete climate normals.
A generous ~281-day season lets Conroe gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 9a, frost is a minor factor for Conroe — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
CONROE · 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 Conroe’s own odds, recorded at CONROE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 31 | Mar 9 | Feb 16 | Nov 2 | Nov 20 | Dec 8 |
| 32°F | Mar 17 | Feb 24 | Jan 26 | Nov 11 | Dec 2 | Jan 2 |
| 28°F | Mar 6 | Feb 2 | Dec 31 | Nov 24 | Dec 23 | Jan 28 |
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 Conroe, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 30 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.
Conroe planting FAQ
When is the last spring frost in Conroe, TX?
Plan for the last spring frost in Conroe around February 24 (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 Conroe, TX?
In Conroe, the first 32°F freeze of fall lands around December 2 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Conroe in?
Conroe is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Conroe?
Conroe has about 281 frost-free days — a long growing season — between the average last spring frost (February 24) and first fall frost (December 2).
When should I plant tomatoes in Conroe?
For Conroe, sow tomatoes indoors about December 30–January 13 and move the seedlings out around March 3, after the last spring frost.
Never miss a window in Conroe
An email when it’s time to start seeds, transplant, and sow — timed to Conroe’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- The Woodlands · 18 km
- Tomball · 29 km
- Spring · 31 km
- Huntsville · 42 km
- Humble · 43 km
- Aldine · 47 km
- Atascocita · 48 km
- Houston · 61 km
Frost dates recorded at CONROE, 0 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 Conroe, TX — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00411956. Retrieved from https://blissgarden.com/texas/conroe.