What plant hardiness zone is River Pines

River Pines is located at Amador County, California (CA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for River Pines is 9a by the USDA scale.

Coldest zone's winter temperature is +20 … +25 °F.

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

River Pines, California @ wikipedia.