Texas FFA Nursery Landscape Practice Exam

When referring to the USDA Plant Hardiness Zone map, what can one determine?

1. Humidity and microclimatic changes for an area

2. Maximum expected temperature for an area

3. Soil characteristics for an area

4. Minimum expected temperature for an area

The correct answer is: Minimum expected temperature for an area

The USDA Plant Hardiness Zone map is a critical tool for understanding which plants are likely to thrive in specific geographical areas based on climate conditions. The primary information provided by this map is the minimum expected temperature for various regions, which is crucial for determining the cold hardiness of plants. Each zone on the map is defined by a range of temperatures, helping horticulturists and gardeners select plants that can survive and grow under local winter conditions. In practical terms, the minimum temperature helps individuals choose plants that are appropriate for their area, ensuring successful growth and longevity. Plants that are not hardy enough to withstand the expected lows of a specific zone may perish during colder seasons. Understanding these temperature zones is key for anyone involved in agricultural practices, landscaping, or gardening, as it influences planting decisions significantly.