What plant hardiness zone is Flint Hill

Flint Hill is located at Saint Charles County, Missouri (MO), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Flint Hill 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.

Flint Hill, Missouri @ wikipedia.