USDA Zone 10 with Map

What is USDA Planting Zone 10?

USDA Zone 10 is characterized by average annual minimum winter temperatures of 30°F to 40°F (-1.1°C to 4.4°C). It is divided into two subzones: 10a (30°F to 35°F/-1.1°C to 1.7°C) and 10b (35°F to 40°F/1.7°C to 4.4°C), each with slightly varying growing conditions.

Geographically it spans across coastal Southern California, extending from the greater Los Angeles area down to San Diego, and continues along parts of the southern Arizona border. In Texas, it appears as a narrow strip along the Gulf Coast near Brownsville and South Padre Island.

Zone 10 also covers Louisiana’s coastal edge near New Orleans and has a significant presence in southern Florida, particularly from the Tampa Bay area southward through Miami and the Florida Keys.

USDA Zone 10 regions form discontinuous pockets of warm-weather zones rather than a continuous band, representing some of the warmest growing areas in the continental United States.

Search USDA Planting Zones 10 by ZipCode

USDA Planting Zones 10 Map

Zone 10a

Zone 10a experiences 30°F–35°F (-1.1°C–1.7°C) winters with rare frost events. It covers coastal Southern California, southern Arizona, parts of southern Texas, and some inland areas, as shown in the orange-marked regions on the map below.

Zone 10b

USDA Zone 10b experiences 35°F–40°F (1.7°C–4.4°C) winters, depicted in red color in map below, includes smaller, warmer pockets focused in southernmost Florida and select areas along the southern coasts of California and Texas.

States in Zone 10

1. Arizona

Arizona’s Zone 10a spans its warmest western and southwestern regions, covering the Phoenix metro area and Colorado River valleys. Major cities include Phoenix (notable zips: 85001-85082), Scottsdale (85254-85267), Mesa (85202-85274), and Yuma (85364-85369), with winter lows of 30°F to 35°F (-1.1°C to 1.7°C).

It also includes communities cluster near the Colorado River (Bullhead City 86430, Lake Havasu City 86403-86406) and southwestern border towns like San Luis (85349). This frost-tolerant zone supports heat-loving plants like citrus and palms, with no Zone 10b areas present in the state.

2. California

California’s Zone 10 spans coastal and urban areas. Zone 10a includes Northern California’s Berkeley (94701-94720), Southern California’s Burbank (91501-91526), and inland Escondido (92025-92046).

Zone 10b covers Los Angeles (90001-90099) and coastal San Diego (92101-92124), along with Anaheim (92801-92806) and Long Beach (90802-90835).

Coastal palms and citrus thrive here, with 10b dominating Southern California’s sun-soaked beaches and cities.

3. Florida

Florida’s Zone 10 divides into 10a (Central/Gulf Coast) and 10b (southeastern tip). Zone 10a features Tampa (33634-33664), Clearwater (33755-33769), and Cape Canaveral’s Cocoa Beach (32931).

Zone 10b’s frost-free Miami (33101-33199) and Fort Lauderdale (33301-33317) enjoy tropical temps, supporting mangroves and coconut palms. Coastal 10b stretches to Boca Raton (33427-33488) and West Palm Beach (33401-33422).

4. Louisiana

Louisiana’s small Zone 10a touches the Gulf Coast, with winter lows of 30°F to 35°F (-1.1°C to 1.7°C). It includes communities like Grand Isle (70358) and Venice (70091) in the Mississippi Delta, where bald cypress and marsh plants thrive in the humid, salt-tolerant environment. This region benefits from the Gulf’s warming influence, rarely experiencing hard freezes.

5. Nevada

Nevada’s tiny Zone 10a is along the Colorado River near Arizona, where Laughlin (89028) enjoys a rare, river-valley microclimate with winter lows of 30°F to 35°F (-1.1°C to 1.7°C). It supports heat-loving plants like date palms, thriving in its low-elevation warmth compared to surrounding Mojave landscapes.

6. Texas

Texas’ Zone 10 spans its tropical southern edges. Zone 10a dominates the Gulf Coast and Rio Grande Valley, covering Corpus Christi (78401-78480), Brownsville (78520-78526), and Galveston (77550-77555), where citrus groves and sabal palms flourish.

The warmer Zone 10b (35°F–40°F/1.7°C–4.4°C) covers South Padre Island (78597), boasting frost-free winters ideal for coconut palms. 10b key regions include the shrimp-bay communities of Port Aransas (78373) and Rio Grande farm hubs like McAllen (78501-78505) and Mission (78572-78574).

What are best Plants for USDA ZOne 10?

Top 10 plants well-suited for USDA Zone 10’s tropical climate with minimal frost and year-round warmth:

1. Hibiscus
   Thrives in Zone 10’s heat and humidity, producing vibrant blooms nearly year-round. Requires minimal chill hours compared to temperate zones.
2. Bougainvillea
   Drought-tolerant vine ideal for Zone 10’s long dry seasons. Intense sunlight enhances its colorful bract production.
3. Citrus Trees (Orange, Lemon, Lime)
   Flourish in Zone 10’s mild winters (40-50°F lows) that prevent frost damage. Extended growing season allows multiple fruit harvests.
4. Plumeria
   Tropical native needs Zone 10’s consistent warmth (60°F+ nights) for fragrant blooms. Sensitive to cold absent in this zone.
5. Bird of Paradise
   Prefers Zone 10’s steady 70-90°F range and coastal humidity. Rare freezes won’t damage established plants.
6. Aloe Vera
   Succulent thrives in Zone 10’s arid periods and sandy soils. Winter warmth prevents cold stress seen in cooler zones.
7. Coconut Palm
   Requires Zone 10’s frost-free winters and oceanic influences. Matures faster here than in marginal tropical zones.
8. Mango Tree
   Needs Zone 10’s extended hot seasons (6+ months above 80°F) for proper fruit development. No risk of freeze damage.
9. Pineapple
   Short-day tropical plant grows year-round in Zone 10’s steady temperatures. Well-drained soils prevent root rot.
10. Basil
    Heat-loving herb prospers in Zone 10’s endless summer. No cold snaps to trigger premature flowering.