USDA hardiness zone
Zone 10b
Rolled up from the 761 ZIP codes in our data that are classified zone 10b, covering 1,655 nurseries and garden centers across 160 cities we track in this zone.
Average minimum winter temperature
35°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
352 days
Average monthly temperature
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 57.9° | 58.8° | 61.1° | 63.8° | 67.1° | 70.4° | 73.2° | 74.2° | 73.1° | 69.2° | 63.1° | 58.3° |
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 10b means an average annual extreme minimum winter temperature of 35°F to 40°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, via phzmapi.org's ZIP-level derivation.
Frost in zone 10b is a near-continuous growing climate reporting a token frost date rather than a real season: where our data still shows one, the last frost runs around January 24 to March 4 and the first fall frost around November 25 to December 27 (NOAA 1991-2020 Climate Normals). Timing here runs on monthly temperature instead. This zone is also this directory's own representative for the hot band on the monthly planting guides, anchored to a Palm Beach County, FL ZIP whose coldest month still averages in the mid-60s and whose warmest month never crosses the 85°F ceiling where most planting stops working in our own crop table's warm-season read.
We track nurseries across California, Florida, and Hawaii in zone 10b, with Los Angeles, CA and Miami, FL tied for the most, followed by Homestead, FL.
Cities we track in zone 10b
- Los Angeles, CA (110)
- Miami, FL (110)
- Homestead, FL (90)
- Loxahatchee, FL (70)
- San Diego, CA (62)
- Naples, FL (60)
- West Palm Beach, FL (49)
- San Francisco, CA (43)
- Saint Petersburg, FL (38)
- Fort Myers, FL (37)
- Davie, FL (34)
- Boynton Beach, FL (31)
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).