What is the average low temp in zone 7a?
Zones 7a and 7b both have a medium-length growing season. Zone 7a’s minimum average temperature is 0 to 5 degrees, and Zone 7b’s minimum average temperature is 5 to 10 degrees. The last frost date is around April 15, and the first frost date is around November 15. The USDA Plant Hardiness Zone Map designates areas based on the average annual minimum winter temperature. California’s zones range from 5a in the mountainous regions to 10b in the warmest coastal areas, which means a wide variety of plants can thrive here depending on local conditions.San Bernardino, California is located in USDA Hardiness Zone 9. Planting vegetable seeds or transplants at the correct time is important for getting the most out of your garden. Knowing your first and last frost dates will help you start your vegetable seeds at the right time.If you garden in USDA Hardiness Zone 6, you enjoy one of the most garden-friendly climates in the country. With minimum winter temperatures between -10 and 0°F, Zone 6 sits perfectly between northern cold and southern warmth, giving gardeners a wide selection of plants to work with.