What plant hardiness zone is Fountain Hills

Fountain Hills is located at Maricopa County, Arizona (AZ), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Fountain Hills is 9b by the USDA scale.

Coldest zone's winter temperature is +25 … +30 °F.

Plants of 9b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 9b USDA.