Us Hardiness Zone Map 2024 Pdf. For example, seattle, washington, and the city of austin, texas, are both in the usda hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle. That doesn't necessarily mean a huge change—you still aren't going to be able to plant an orange tree in.
For example, seattle, washington, and the city of austin, texas, are both in the usda hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle. The usda hardiness zone map is an excellent tool when it comes to determining which plants to grow based on average minimum temperatures.