USDA Hardiness Zone 10a
Frost Dates for 33440 — Clewiston, Florida
Averages from Clewiston #2, Fl US, the nearest reporting station, 3.5 miles away.
Plant tender crops after January 27, and expect the first autumn freeze around January 13. That leaves about 357 frost-free days.
- Last spring frost
- January 27
- First fall frost
- January 13
- Growing season
- 357 days
- Hardiness zone
- 10a
50% probability
50% probability
frost-free
30 to 35°F annual low
Planting calendar for 33440
| When | What to do |
|---|---|
| November 18 – December 2 | Start peppers and aubergines indoors They need eight to ten weeks under lights before they can go out. |
| December 2 – December 16 | Start tomatoes indoors Six to eight weeks gives a transplant big enough to set fruit early. |
| December 30 – January 13 | Sow peas, spinach, lettuce, radish outdoors These tolerate light frost and prefer to germinate in cool soil. |
| January 27 onward | Transplant tomatoes, peppers, basil, squash, cucumbers The average last freeze has passed — still watch the actual forecast. |
| by October 21 | Sow the autumn crop of carrots, beets and brassicas They need about twelve weeks to size up before growth stops. |
| by December 30 | Harvest tender crops, or be ready to cover them A first freeze two weeks early is well within normal variation. |
| January 13 onward | Plant garlic, mulch beds, lift tender bulbs Garlic wants a cold spell; bare soil loses structure over winter. |
What these dates mean
Wait until after January 27 to put tender plants — tomatoes, peppers, basil, squash — in the ground. That is the date by which half of years in Clewiston, Florida are past their last freeze. Harvest before January 13, which leaves roughly 357 frost-free days.
ZIP 33440 sits in USDA hardiness zone 10a, meaning the average coldest night of the year falls between 30 to 35°F. Zone decides what survives the winter; frost dates decide when to plant each spring. They are different questions, and a plant can pass one and fail the other.
These are thirty-year NOAA averages for 1991–2020, not a forecast. Any individual year can frost two to three weeks either side of these dates, so check the actual forecast before planting out.