What plant hardiness zone is Crystal Lake

Crystal Lake is located at Hancock County, Iowa (IA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Crystal Lake is 5a by the USDA scale.

Coldest zone's winter temperature is −20 … -15 °F.

Plants of 5a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 5a USDA.