What plant hardiness zone is Old Greenwich

Old Greenwich is located at Fairfield County, Connecticut (CT), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Old Greenwich is 7a by the USDA scale.

Coldest zone's winter temperature is 0 … +5 °F.

Plants of 7a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 7a USDA.

Old Greenwich, Connecticut @ wikipedia.