Zone 10A is a warm subtropical region with mild winters and long summers. With an average last spring frost around Feb 1 and first fall frost around Dec 20, you have approximately 322 frost-free days per year. Use the planting dates below to plan your garden around these key frost windows. 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.