Planting Zone Map

Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for Carolina, PR

Carolina, PR is in USDA zones 13a to 13b across its 9 ZIP codes.

Carolina on the zone map

Outlined: its 5 ZIP code areas · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zones13a–13b60 to 70 °F

ZIP codes9

Last frostrare

First frostrare

Growing seasonall year

13a 4 ZIPs 13b 5 ZIPs

Frost forecast — next 7 nights

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Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates

Frost is rare or absent here: Carolina, PR is in zone 13b, where the coldest night of a typical winter stays above freezing. Cool-season vegetables grow best from fall through spring; summer heat, not frost, is the limit.

Native plants for zone 13a in Puerto Rico

153 plants native to Puerto Rico, recorded in Puerto Rico, and rated by the USDA to survive 60 °F or colder — the bottom of zone 13a. Each links to its USDA PLANTS profile.

Trees 41

achiotillo52 ft · blooms early spring · high shade tolerance · to 40 °F bastard redwood15 ft · to 40 °F bulletwood100 ft · blooms summer · low shade tolerance · to 52 °F bullwood100 ft · blooms summer · high shade tolerance · to 40 °F cabbagebark tree90 ft · blooms summer · high shade tolerance · to 32 °F candletree115 ft · blooms early summer · medium shade tolerance · to 50 °F

Shrubs 46

American muskwood10 ft · blooms spring · to 40 °F Antilles calophyllum65 ft · blooms late spring · medium shade tolerance · to 36 °F bastard stopper43 ft · blooms summer · high shade tolerance · to 40 °F black mangrove30 ft · blooms indeterminate · high shade tolerance · to 10 °F broadleaf caper33 ft · to 40 °F broomstick25 ft · blooms spring · medium shade tolerance · to 40 °F

Wildflowers & perennials 31

bayhops1 ft · blooms indeterminate · medium shade tolerance · to 17 °F broadleaf arrowhead5 ft · blooms late spring · high shade tolerance · to −33 °F Canadian horseweed5 ft · blooms indeterminate · high shade tolerance · to 52 °F cinnamon fern5 ft · blooms spring · low shade tolerance · to −33 °F climbing dayflower1 ft · blooms summer · low shade tolerance · to 47 °F common duckmeatblooms late summer · medium shade tolerance · to −38 °F

Grasses 34

American cupscale3 ft · blooms early summer · high shade tolerance · to −18 °F beaked spikerush3 ft · blooms late spring · high shade tolerance · to −28 °F broadleaf carpetgrass1 ft · blooms spring · high shade tolerance · to −3 °F broomsedge bluestem3 ft · blooms late spring · high shade tolerance · to −18 °F brownseed paspalum3 ft · blooms summer · medium shade tolerance · to 7 °F bushy bluestem6 ft · blooms late summer · high shade tolerance · to −23 °F

Source: USDA, NRCS. 2026. The PLANTS Database (plants.usda.gov), National Plant Data Team — state distribution, native status and the “Temperature, Minimum” characteristic. Check light, moisture and soil needs before buying; local nurseries and your state native plant society can confirm what thrives in Carolina, PR.

Climate in Carolina, PR

Longest day13 h 14 mindaylight on June 21

Shortest day11 h 01 mindaylight on December 21

Onions to growShort-daysummer days stay under about 14 h 20 min, so long-day varieties won’t bulb

Daylight is calculated from latitude.

ZIP codes in Carolina

Puerto Rico planting zones →

Questions about Carolina

What planting zone is Carolina, PR?

Carolina, PR is in USDA hardiness zones 13a to 13b on the 2023 map (13a: 60 to 65 °F; 13b: 65 to 70 °F).

What kind of onions grow in Carolina, PR?

Short-day onions: the longest day is 13 h 14 min, so summer days stay under about 14 h 20 min, so long-day varieties won’t bulb.