What plant hardiness zone is San Luis Obispo

San Luis Obispo is located at San Luis Obispo County, California (CA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for San Luis Obispo 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.