What zone 10a means for Port Saint Lucie
Hardiness zones are based on the average of the coldest night of each winter over 30 years (1991 to 2020). In zone 10a, that average is 30 to 35°F (-1 to 2°C). Plants labeled hardy to zone 10a or colder should survive a typical Port Saint Lucie winter. A plant rated only to a warmer zone will need a sheltered spot, a pot you can bring inside, or treating as an annual.
How Port Saint Lucie compares with the rest of Florida
Florida runs from zone 8b to zone 11b on the 2023 map. About 30% of the state's ZIP codes share Port Saint Lucie's zone 10a. Gardeners in colder parts of the state may need hardier plants, while those in warmer parts can grow some plants that would struggle here.
Frost dates in Port Saint Lucie
These are the median dates of the last and first 32°F freeze from NOAA's 1991 to 2020 climate normals, using the weather station closest to Port Saint Lucie (Stuart, about 12 km away). Half of years have a later last frost, so tender plants are safest a week or two after the date. Your own garden can differ with elevation and shelter: check your exact ZIP code above.
Vegetable planting calendar for Port Saint Lucie
Purdue Extension groups vegetables by how much frost they can take and times planting from the average last spring frost. Applied to Port Saint Lucie's last frost of January 23:
| Group | Plant outdoors | Crops |
|---|---|---|
| Hardy crops (tolerate a hard frost) 4 to 6 weeks before the average last spring frost | December 12 to December 26 | Asparagus, broccoli, Brussels sprouts, cabbage, collards, horseradish, kale, kohlrabi, leek, mustard, onion, peas, potato, radish, rhubarb, spinach, turnip |
| Semi-hardy crops (tolerate a light frost) 2 to 4 weeks before the average last spring frost | December 26 to January 9 | Beet, carrot, cauliflower, celery, chard, Chinese cabbage, lettuce, mustard, parsnip |
| Tender crops (damaged by frost) after the average last spring frost, once nights stay above 50°F | From January 23 | Bean, sweet corn, tomato |
| Very tender crops (warm season) at least 2 weeks after the average last spring frost, once nights stay above 60 to 65°F | From February 6 | Cucumber, eggplant, melons, okra, pepper, pumpkin, squash, sweet potato |
Spring planting for direct seeding or transplants. A late cold snap can still happen, so watch the forecast and protect tender plants. Want today's answer for your ZIP code? Use what to plant now.
Sources: NOAA NCEI U.S. Climate Normals 1991 to 2020; Purdue Extension, Indiana Vegetable Planting Calendar (HO-186-W).
Choosing plants for zone 10a
When you shop, look for the hardiness range on the tag or in the catalog, such as "zones 4 to 9". Pick perennials, shrubs and trees whose range includes 10a. If you are set on a plant rated only to a warmer zone, plant it in a sheltered spot against a south-facing wall, mulch the roots before winter, or grow it in a container you can move into a garage. Zones only cover winter cold, so also check sun, water and soil needs. More in how to read a plant tag.
Port Saint Lucie ZIP codes and zones
ZIP codes GeoNames assigns to Port Saint Lucie, which can include PO box ZIP codes.
Other cities in Florida
Frequently asked questions
When is the last frost in Port Saint Lucie?
The median last spring frost (32°F) near Port Saint Lucie is January 23, and the median first fall frost is January 18, based on NOAA 1991 to 2020 climate normals.
What planting zone is Port Saint Lucie in?
Port Saint Lucie, FL is in USDA plant hardiness zone 10a. Zone 10a means an average coldest winter night of 30 to 35°F (-1 to 2°C), based on the 2023 USDA map.
Did Port Saint Lucie's zone change in 2023?
The 2023 USDA map uses weather data from 1991 to 2020. The USDA says about half of the country shifted to the next warmer half zone compared with the 2012 map, while the rest stayed in the same half zone.
Zones: 2023 USDA Plant Hardiness Zone Map ZIP code listings, PRISM Climate Group, Oregon State University. Place names: GeoNames (CC BY 4.0). Not the official USDA map. Our data.