USDA Hardiness Zone 10A includes southern Florida, Hawaii's lowlands, and coastal Southern California, with average annual minimum temperatures between 30°F and 35°F. The growing season averages 322 frost-free days, with a last spring frost around Feb 1 and first fall frost near Dec 20. Zone 10A is a subtropical zone where traditional spring-to-fall timing is often inverted — the prime vegetable growing season runs from October through April, while summer heat induces dormancy in many crops. Heat-tolerant varieties and careful water management are essential year-round. For a personalized forecast based on your specific zip code, use our free planting calendar. Browse individual plant guides for detailed growing instructions, or explore how USDA zones work to better understand your growing conditions.