What plant hardiness zone is Rock Rapids

Rock Rapids is located at Lyon County, Iowa (IA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Rock Rapids is 4b by the USDA scale.

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

Plants of 4b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4b USDA.