USDA hardiness zone
Zone 13a
Rolled up from the 102 ZIP codes in our data that are classified zone 13a, covering 0 nurseries and garden centers across 0 cities we track in this zone.
Average minimum winter temperature
60°F
Frost
Frost is rare or absent across most of this zone; timing here follows temperature, not a spring/fall frost date. Any single ZIP's own exact frost status is on that ZIP's own lookup page, not approximated here.
Average frost-free growing season
233 days
Average monthly temperature
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 43.2° | 42.2° | 42.7° | 44.8° | 47.4° | 49.3° | 49.1° | 49° | 48.6° | 47.7° | 44.8° | 43.4° |
NOAA 1991–2020 Climate Normals, averaged across this zone's member ZIPs.
Crops by frost hardiness
What grows here, and when
Frost is rare or absent here, so cool-season (hardy/semi-hardy) crops typically go in during the cooler months and warm-season (tender/very-tender) crops before the hottest months arrive, rather than on a frost-relative schedule.
Planting windows and crop timing here are computed from USDA/NOAA climate data and the university extension sources cited below, not a site visit or soil test. Treat this as a starting point: local conditions vary, and a local nursery or extension office can advise on your exact site. See our full Disclaimer.
Hardy (49)
- Apple (bare-root fruit tree)
- Apricot (bare-root fruit tree)
- Asparagus
- Bachelor's Button (Cornflower)
- Bare-root rose
- Blackberry
- Blueberry
- Broccoli
- Brussels Sprouts
- Cabbage
- Calendula
- Catnip/Catmint
- Cherry (sweet/tart, bare-root fruit tree)
- Chives
- Collards
- Currant
- Deciduous shade tree (generic, e.g. maple/oak, bare-root or B&B)
- Elderberry
- Evergreen shrub (B&B/potted, e.g. arborvitae, boxwood)
- Flowering deciduous shrub (generic, e.g. lilac/forsythia)
- Garden Peas
- Garlic
- Gooseberry
- Kale
- Kohlrabi
- Larkspur
- Lavender
- Lettuce
- Mint
- Onion (bulb)
- Oregano
- Peach (bare-root fruit tree)
- Pear (bare-root fruit tree)
- Plum (bare-root fruit tree)
- Radish
- Raspberry
- Rhubarb
- Rutabaga
- Sage
- Snapdragon
- Snow Peas
- Spinach
- Strawberry
- Sweet Alyssum
- Sweet Pea
- Table/Bunch Grape
- Tarragon
- Thyme
- Turnip
Semi-hardy (16)
Tender (20)
Zone 13a means an average annual extreme minimum winter temperature of 60°F to 65°F on the 2023 USDA Plant Hardiness Zone Map (USDA/ARS with the PRISM Climate Group at Oregon State University, 1991-2020 records). Every ZIP here carries its zone matched by centroid against the map, not by its polygon boundary, through phzmapi.org's ZIP-level derivation.
The frost dates we hold for this zone, a last frost and a first frost both landing on the same two calendar dates, April 12 and December 1, come from a single thin station match. At a winter this mild, that pairing describes a data limit, not a real frost season.
We track zero nurseries with a ZIP in zone 13a. Every ZIP here sits in Puerto Rico.
Nearby zones
All zones
USDA 2023 Plant Hardiness Zone Map (zone boundaries, via the phzmapi.org ZIP-level derivation) and NOAA 1991–2020 Climate Normals (frost dates, growing season, monthly temperatures).