USDA Hardiness Zone 12 Planting Guide
Zone 12 covers locations where the average annual extreme minimum winter temperature ranges from 50 to 60 degrees Fahrenheit. This page covers both subzones: zone 12a (50 to 55 degrees F) and zone 12b (55 to 60 degrees F).
Zone 12 Overview
Zone 12 covers tropical regions where minimum temperatures range from 50 to 60 degrees Fahrenheit, primarily US territories in the Pacific and Caribbean. These areas experience no meaningful cold and support fully equatorial plant communities. Gardening in zone 12 is limited in the mainland United States but relevant for territory residents and greenhouse growers who maintain tropical conditions year-round. The perpetual warmth accelerates growth but also sustains pest and disease populations without the natural suppression that winter provides in colder zones.
Zone 12 Temperature Ranges
| Subzone | Min Temp (°F) | Max Temp (°F) | Description |
|---|---|---|---|
| 12a | 50°F | 55°F | Tropical Pacific islands; fully tropical climate |
| 12b | 55°F | 60°F | Equatorial regions; constant warmth year-round |
Plants for Zone 12
Zone 12 supports all tropical species without exception. Rare tropical fruits, spices, and ornamentals from equatorial regions worldwide find suitable conditions. Theobroma cacao (chocolate), vanilla orchids, tropical gingers, and exotic palms grow unrestricted by cold. Native rainforest and coastal species dominate natural landscapes.
Vegetable Gardening in Zone 12
Tropical root crops (cassava, taro, yams), tropical beans, and heat-tolerant greens form the vegetable garden foundation. Short-day onion varieties and adapted tomato cultivars produce in the equatorial day-length conditions. Continuous succession planting replaces seasonal schedules since growth never stops.
Frost Protection & Season Tips for Zone 12
Cold protection is not applicable in zone 12. Gardening challenges center on managing extreme heat, tropical storms, soil erosion during heavy rains, and year-round pest populations. Shade structures, windbreaks, and well-designed drainage systems are the structural priorities for productive gardens.