Philadelphia, Pennsylvania has single planting zone: 7b, per USDA’s plant hardiness zone map released in 2023.
Zone 7b covers entire city, from Center City to outlying neighborhoods, with average annual minimum temperatures ranging 5°F to 10°F (-15°C to -12.2°C). Relatively mild climate allows diverse range of plants to thrive throughout Philadelphia.
You can pinpoint your Philadelphia USDA zone using our three tools given below, Zipcode to planting zone tool, Easy interactive map or by using planting zone table.
Philadelphia Planting Zones by ZipCode
Planting Zones Philadelphia Map
Select or type your Philadelphia location in the selection box below, to find its USDA planting zone. You can select map layers from top right corner button in mapview.
City Name
Philadelphia Area Planting Zone
Planting Zones
Planting Zones
Philadelphia Planting Zones Table
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What are planting zones in Philadelphia, Pennsylvania?
Zone 7b
Zone 7b, shown by light green color on our map above, covers all of Philadelphia which makes it easy to select plants.
Some key areas within this zone of Philadelphia are Center City (zip codes 19102, 19103, 19106, 19107), North Philadelphia (zip codes 19120, 19124, 19140) having important institutions like Temple University, South Philadelphia (zip codes 19145, 19146, 19147, 19148), West Philadelphia (zip codes 19104, 19131, 19139), Northeast Philadelphia (zip codes 19111, 19114, 19115, 19116), Manayunk and Roxborough (zip codes 19127, 19128), Chestnut Hill (zip code 19118) and Germantown (zip code 19144).
Please note that while entire city falls within Zone 7b, microclimates can still exist due to factors such as proximity to water bodies (like Delaware and Schuylkill Rivers), urban heat island effects, and elevation changes.
Best plants for Philadelphia?
For Philadelphia, some of the best plants include Southern magnolias, hellebores, and crape myrtles. These plants were previously considered marginally hardy but are now well-suited to the area’s climate. Other good options are snowdrops and daffodils, which are blooming earlier in spring. Native plants and those adapted to warmer temperatures are ideal choices for Philadelphia gardens.
How have Plant hardiness zones for Philadelphia changed over time?
Plant hardiness zones for Philadelphia, Pennsylvania have shifted noticeably over time as per USDA latest map released in 2023. In 2012, Philadelphia was split between zones 7a and 7b. In 2023 USDA Plant Hardiness Zone Map update, Philadelphia is now solidly in zone 7b.
This change reflects warming trend, with the city experiencing milder winters and earlier springs. This shift in zones allows for a wider variety of plants to be grown in the area, but also raises concerns about changing ecosystems and invasive species.