How many hardiness zones are used in the United States?

How many hardiness zones are used in the United States?

• A. 10
• B. 5
• C. 8
• D. 12

Answer: (A)

Hardiness zones categorize areas by the coldest winter temperatures to guide which plants can survive each region. In many introductory gardening materials, the United States is described using ten broad hardiness zones. This simplified framework makes it easier to compare regions and pick plants that will withstand winter conditions without getting into finer subdivisions. While the full USDA system extends to thirteen zones (with additional subdivisions), the ten-zone model is the common teaching framework for basic planning. So, among the given options, ten is the best fit for this context.

Hardiness zones categorize areas by the coldest winter temperatures to guide which plants can survive each region. In many introductory gardening materials, the United States is described using ten broad hardiness zones. This simplified framework makes it easier to compare regions and pick plants that will withstand winter conditions without getting into finer subdivisions. While the full USDA system extends to thirteen zones (with additional subdivisions), the ten-zone model is the common teaching framework for basic planning. So, among the given options, ten is the best fit for this context.