GreenlyHouston: frost dates
United States
In Houston the last spring frost usually comes around 17 February and the first autumn frost around 27 November, which leaves about 283 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground around 24 February.
| Last spring frost | around 17 February |
|---|---|
| First autumn frost | around 27 November |
| Frost-free days | 283 days |
Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.
When to sow and plant
| Crop | Sow for seedlings | Plant out in a greenhouse | Open ground |
|---|---|---|---|
| Bell Pepper | 21 November | 3 February | 24 February |
| Chili Pepper | 7 December | 19 February | 12 March |
| Corn | — | 3 February | sow 24 February |
| Cucumber | 23 December | 3 February | 24 February |
| Eggplant | 25 November | 3 February | 24 February |
| Green Beans | 28 December | 3 February | 24 February |
| Melon | 13 December | 3 February | 24 February |
| Peas | — | 6 January | sow 27 January |
| Physalis | 20 December | 3 February | 24 February |
| Pumpkin | 28 December | 3 February | 24 February |
| Sweet Corn | — | 3 February | sow 24 February |
| Tomato | 8 December | 3 February | 24 February |
| Watermelon | 2 January | 3 February | 24 February |
| Zucchini | 2 January | 3 February | 24 February |
Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day.
Houston: weather for the next 7 days
Forecast by Open-Meteo. Nights at or below 0 °C are marked as frost.
Planted in autumn
| Crop | Plant around |
|---|---|
| Crocus | 28 October |
| Daffodil | 28 October |
| Garlic | 28 October |
| Hyacinth | 28 October |
| Lily | 28 October |
| Tulip | 28 October |
A month before the first autumn frost, so the roots grow before winter.