USDA Hardiness Zone 12b
Frost Dates for 00680 — Mayaguez, Puerto Rico
Averages from Perrine 4w, Fl US, the nearest reporting station, 992.9 miles away.
Plant tender crops after January 18, and expect the first autumn freeze around January 13. That leaves about 365 frost-free days.
- Last spring frost
- January 18
- First fall frost
- January 13
- Growing season
- 365 days
- Hardiness zone
- 12b
50% probability
50% probability
frost-free
55 to 60°F annual low
Planting calendar for 00680
| When | What to do |
|---|---|
| November 9 – November 23 | Start peppers and aubergines indoors They need eight to ten weeks under lights before they can go out. |
| November 23 – December 7 | Start tomatoes indoors Six to eight weeks gives a transplant big enough to set fruit early. |
| December 21 – January 4 | Sow peas, spinach, lettuce, radish outdoors These tolerate light frost and prefer to germinate in cool soil. |
| January 18 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 18 to put tender plants — tomatoes, peppers, basil, squash — in the ground. That is the date by which half of years in Mayaguez, Puerto Rico are past their last freeze. Harvest before January 13, which leaves roughly 365 frost-free days.
ZIP 00680 sits in USDA hardiness zone 12b, meaning the average coldest night of the year falls between 55 to 60°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.