What Growing Zone Is Philadelphia?
Our records indicate the United States Department of Agriculture has given Philadelphia a growing zone designation of 6a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Philadelphia's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Philadelphia's weather data from 1991 - 2020 in their analysis.
Latest IN growing zone mapIf you are looking for plants suitable for growing in the Philadelphia area, head on over to our page on plants that grow well in Philadelphia, IN.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Reusable Grow Bags
Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Raised Garden Planter
Elevated planter for easy access and better drainage.
Latest IN growing zone mapThe growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Philadelphia is in growing zone 6a this means that plants there can survive temperatures as low as -10 to -5 degrees Fahrenheit. Plants for Philadelphia's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.
Some zones may have been changed by the USDA as of 2023. To see if the Philadelphia area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.
Half zone changes from 2012 to 2023The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!
Hardiness Zone FAQ
Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Philadelphia, IN.
The USDA hardiness zone is 6a for Philadelphia. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Philadelphia's Growing Zone Details
USDA Growing Zone: 6a
Zip Codes: 46140
Longitude: -85.8455
Latitude: 39.7814
Lowest Avg Temperatures (F): -10 to -5
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Shiitake Mushroom Kit
Grow your own delicious shiitake mushrooms at home.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Map of the Philadelphia Area
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Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Reusable Grow Bags
Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
Plants For Other States
Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.
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Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
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