Hartford, Connecticut spans USDA Hardiness Zones 6b and 7a, with most areas falling within Zone 6b, as per USDA latest 2023 update. The 2 Planting zones of Hartford arre listed below.
- Zone 6b: Zone 6b (-5°F to 0°F / -20.6°C to -17.8°C) includes urban districts like Downtown Hartford (06106), suburban communities such as West Hartford (06117) and Glastonbury Center (06033).
- Zone 7a: Zone 7a (0°F to 5°F / -17.8°C to -15°C) applies to select low-lying areas influenced by the Connecticut River’s moderating effects, including Riverside Park, Sheldon Charter Oak, and Wethersfield.
Higher-elevation areas like North Granby and Canton Valley remain firmly in Zone 6b, while low-lying river-adjacent zones benefit from the Connecticut River’s moderating influence.
Pinpoint your Hartford, Connecticut, USDA zone using our three tools given below, Zipcode to planting zone search tool, interactive map or by using planting zone table at the end.
Hartford Planting Zones by ZipCode
Enter 5 digit Hartford location zipcode to find its USDA Growing zone.
Hartford Planting Zones Map
Select or type your Hartford location in the selection box below to find its USDA Planting zone.
City Name
Hartford Area Planting Zone
Planting Zones
Planting Zones
Hartford Planting Zones Table
The table given below lists all the Hartford location alongwith their USDA Hardiness zone.
| Hartford Location | Planting Zone |
|---|---|
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Hartford Planting Zones
Hartford, Connecticut, features two USDA planting zones: Zone 6b and Zone 7a.
Zone 6b
Most of Hartford, including urban and suburban areas like Downtown Hartford, West Hartford and Glastonbury Center is under Zone 6b.
These regions experience colder winters, with temperatures occasionally dipping to -5°F (-20.6°C), making them suitable for cold-hardy plants like Hydrangeas (Hydrangea spp.), Red Chokeberry (Aronia arbutifolia), and Mountain Laurel (Kalmia latifolia). Higher-elevation neighborhoods such as North Granby and Canton Valley also remain in Zone 6b, where frost-tolerant perennials like Baptisia (Baptisia australis) and Hosta (Hosta spp.) grows.
Zone 7a
Zone 7a applies to select low-lying areas influenced by the Connecticut River’s moderating temprature effects, including Riverside Park, Sheldon Charter Oak, and Wethersfield.
These neighborhoods benefit from milder winters, rarely dropping below 0°F (-17.8°C), allowing to grow borderline-hardy species like Figs (Ficus carica), Crape Myrtles (Lagerstroemia indica), and Camellias (Camellia japonica).