What plant hardiness zone is Saint Robert
Saint Robert is located at Pulaski County, Missouri (MO), USA.
Plant hardiness zone (winter frost zone or gardening zone) for Saint Robert is 6a by the USDA scale.
Coldest zone's winter temperature is −10 … -5 °F.
Plants of 6a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 6a USDA.