Bonham, TX planting zone & frost dates
Bonham is in USDA hardiness zone 8a. The last spring frost usually comes around March 16 and the first fall frost around November 13, for a growing season of about 242 days.
Planting calendar for Bonham
Dates are counted from the average last spring frost (March 16) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Jan 19 – Feb 2 Transplant outdoors: Mar 23 – Mar 30 |
| Peppers | Start seeds indoors: Jan 5 – Jan 19 Transplant outdoors: Mar 30 – Apr 6 |
| Eggplant | Start seeds indoors: Jan 5 – Jan 19 Transplant outdoors: Mar 30 – Apr 6 |
| Broccoli | Start seeds indoors: Jan 5 – Jan 19 Transplant outdoors: Feb 16 – Mar 2 |
| Cabbage | Start seeds indoors: Jan 5 – Jan 19 Transplant outdoors: Feb 16 – Mar 2 |
| Onions (sets) | Plant outdoors: Feb 16 – Mar 2 |
| Peas | Sow outdoors: Feb 2 – Feb 16 |
| Spinach | Sow outdoors: Feb 2 – Feb 16 |
| Lettuce | Sow outdoors: Feb 16 – Mar 2 |
| Carrots | Sow outdoors: Feb 16 – Mar 2 |
| Potatoes | Plant outdoors: Feb 16 – Mar 2 |
| Beans | Sow outdoors: Mar 23 – Mar 30 |
| Sweet corn | Sow outdoors: Mar 23 – Mar 30 |
| Cucumbers | Sow outdoors: Mar 23 – Mar 30 |
| Squash & zucchini | Sow outdoors: Mar 23 – Mar 30 |
| Basil | Start seeds indoors: Feb 2 – Feb 16 Transplant outdoors: Mar 23 – Mar 30 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Sep 18 (8 weeks before the average first fall frost on Nov 13).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Feb 28 | Mar 16 | Apr 4 |
| First 32°F frost in fall is before | Dec 1 | Nov 13 | Oct 29 |
How to read it: in spring there is a 10% chance of a frost after April 4, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 29. A hard freeze (28°F) usually ends around March 4.
Hardiness zone by ZIP code in Bonham
- 75418 zone 8a
Nearby cities
- Denison zone 8a, last frost Mar 14
- Sherman zone 8a, last frost Mar 14
- Anna zone 8b, last frost Mar 17
- Greenville zone 8b, last frost Mar 18
- McKinney zone 8b, last frost Mar 17
- Fairview zone 8b, last frost Mar 18
- Royse City zone 8b, last frost Mar 10
- Paris zone 8b, last frost Mar 14
Questions
What growing zone is Bonham, TX?
Bonham is in USDA Plant Hardiness Zone 8a (average extreme winter low 10°F to 15°F), according to the USDA 2023 map.
When is the last frost in Bonham?
The average last spring frost (32°F) in Bonham is March 16. There is still a 10% chance of frost until April 4.
When can I plant tomatoes in Bonham?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Mar 23 – Mar 30. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Bonham 3Nne, TX (USC00410923), 7.1 km (4.4 mi) from the city center, elevation 180 m, based on 24 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.