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 |
|---|---|---|---|
| Achocha | 25 December | 3 February | 24 February |
| Arugula | — | 6 January | sow 27 January |
| Basil | 27 December | 3 February | 24 February |
| Beet | — | 6 January | sow 27 January |
| Bell Pepper | 21 November | 3 February | 24 February |
| Black-eyed Susan | 24 December | — | 24 February |
| Bok Choy | 30 December | 3 February | 24 February |
| Broad bean | — | 6 January | sow 27 January |
| Broccoli | — | 6 January | sow 27 January |
| Brussels Sprouts | 22 November | 6 January | 27 January |
| Cabbage | — | 6 January | sow 27 January |
| Calendula | — | 6 January | sow 27 January |
| Carrot | — | — | sow 27 January |
| Cauliflower | 25 November | 6 January | 27 January |
| Celeriac | 18 November | 3 February | 24 February |
| Celery | 18 November | 3 February | 24 February |
| Celosia | 20 December | 3 February | 24 February |
| Chamomile | — | 6 January | sow 27 January |
| Chayote | 7 November | 3 February | 24 February |
| Chickpea | — | — | sow 27 January |
| Chili Pepper | 7 December | 19 February | 12 March |
| China aster | 13 December | 3 February | 24 February |
| Chives | — | — | sow 27 January |
| Cilantro | — | 6 January | sow 27 January |
| Corn | — | 3 February | sow 24 February |
| Cosmos | 20 December | 3 February | 24 February |
| Cucumber | 23 December | 3 February | 24 February |
| Daikon | — | 6 January | sow 27 January |
| Delphinium | 29 November | — | 27 January |
| Dill | — | 6 January | sow 27 January |
| Eggplant | 25 November | 3 February | 24 February |
| Florence fennel | 20 December | 3 February | 24 February |
| Garden sorrel | — | 6 January | sow 27 January |
| Green Beans | 28 December | 3 February | 24 February |
| Hyssop | — | — | sow 27 January |
| Kale | — | 6 January | sow 27 January |
| Kiwano | 2 January | 3 February | 24 February |
| Kohlrabi | — | 6 January | sow 27 January |
| Leek | 28 October | 6 January | 27 January |
| Lemon balm | — | 6 January | sow 27 January |
| Lettuce | — | 6 January | sow 27 January |
| Lisianthus | 11 October | 6 January | 27 January |
| Lovage | — | — | sow 27 January |
| Luffa | 23 December | 3 February | 24 February |
| Marigold | 23 December | 3 February | 24 February |
| Melon | 13 December | 3 February | 24 February |
| Microgreens | — | 3 February | sow 24 February |
| Moringa | 26 December | 19 February | 12 March |
| Mustard greens | — | 6 January | sow 27 January |
| Napa cabbage | 1 January | 3 February | 24 February |
| Nasturtium | 27 December | 3 February | 24 February |
| Okra | 23 December | 3 February | 24 February |
| Oregano | 7 November | 6 January | 27 January |
| Pansy | 11 November | 6 January | 27 January |
| Parsley | — | 6 January | sow 27 January |
| Parsnip | — | — | sow 27 January |
| Peanut | 28 December | 3 February | 24 February |
| Peas | — | 6 January | sow 27 January |
| Petunia | 2 December | 3 February | 24 February |
| Physalis | 20 December | 3 February | 24 February |
| Pumpkin | 28 December | 3 February | 24 February |
| Purple coneflower | 26 November | — | 27 January |
| Radish | — | — | sow 27 January |
| Sage | 18 November | 6 January | 27 January |
| Snapdragon | 2 November | 6 January | 27 January |
| Spinach | — | 6 January | sow 27 January |
| Stevia | 16 December | 3 February | 24 February |
| Stock | — | 6 January | sow 27 January |
| Sunflower | — | 3 February | sow 24 February |
| Sweet Corn | — | 3 February | sow 24 February |
| Sweet pea | 25 November | 6 January | 27 January |
| Sweet William | — | — | sow 27 January |
| Swiss Chard | — | 6 January | sow 27 January |
| Thyme | — | 6 January | sow 27 January |
| Tomato | 8 December | 3 February | 24 February |
| Turnip | — | 6 January | sow 27 January |
| Watercress | — | 6 January | sow 27 January |
| Watermelon | 2 January | 3 February | 24 February |
| Zinnia | 15 January | 19 February | 12 March |
| 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 |
|---|---|
| Bearded Iris | 28 October |
| Crocus | 28 October |
| Daffodil | 28 October |
| Garlic | 28 October |
| Hyacinth | 28 October |
| Lily | 28 October |
| Peony | 28 October |
| Saffron | 28 October |
| Tulip | 28 October |
| Wild garlic | 28 October |
A month before the first autumn frost, so the roots grow before winter.