When to plant in Tomball, TX
USDA Zone 9bEverything below — frost dates, hardiness zone, and what to plant when in Tomball, Texas — is derived from the closest NOAA station with complete climate normals.
With about 287 frost-free days, Tomball supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 9b, frost is a minor factor for Tomball — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in Tomball is now 8 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
HOUSTON HOOKS MEM 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 Tomball’s own odds, recorded at HOUSTON HOOKS MEM AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 29 | Mar 7 | Feb 11 | Nov 2 | Nov 19 | Dec 8 |
| 32°F | Mar 15 | Feb 19 | Jan 21 | Nov 13 | Dec 3 | Jan 5 |
| 28°F | Mar 5 | Jan 31 | Dec 28 | Dec 2 | Dec 29 | Feb 1 |
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 Tomball, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 29 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.
Tomball planting FAQ
When is the last spring frost in Tomball, TX?
Plan for the last spring frost in Tomball around February 19 (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 Tomball, TX?
In Tomball, the first 32°F freeze of fall lands around December 3 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Tomball in?
Tomball is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Tomball?
Tomball has about 287 frost-free days — a long growing season — between the average last spring frost (February 19) and first fall frost (December 3).
When should I plant tomatoes in Tomball?
For Tomball, sow tomatoes indoors about December 25–January 8 and move the seedlings out around February 26, after the last spring frost.
Never miss a window in Tomball
An email when it’s time to start seeds, transplant, and sow — timed to Tomball’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- The Woodlands · 14 km
- Spring · 23 km
- Conroe · 29 km
- Aldine · 31 km
- Humble · 36 km
- Katy · 40 km
- Houston · 41 km
- Cinco Ranch · 42 km
Frost dates recorded at HOUSTON HOOKS MEM AP, 7 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 Tomball, TX — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00053910. Retrieved from https://blissgarden.com/texas/tomball.