What Growing Zone Is Port Penn?

Our records indicate the United States Department of Agriculture has given Port Penn a growing zone designation of 7b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Port Penn's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Port Penn's weather data from 1991 - 2020 in their analysis.

Latest DE growing zone map

If you are looking for plants suitable for growing in the Port Penn area, head on over to our page on plants that grow well in Port Penn, DE.

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Small Greenhouse Kit

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Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Wooden Chicken Coop

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Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Latest DE growing zone map

The 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 Port Penn is in growing zone 7b this means that plants there can survive temperatures as low as 5 to 10 degrees Fahrenheit. Plants for Port Penn'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.

USDA growing zone map of the United States

Some zones may have been changed by the USDA as of 2023. To see if the Port Penn area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

map of usda hardiness zone changes from 2012 to 2023

Half zone changes from 2012 to 2023

The 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!

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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 Port Penn, DE.

The USDA hardiness zone is 7b for Port Penn. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Port Penn's Growing Zone Details

USDA Growing Zone: 7b

Zip Codes: 19731

Longitude: -75.5811

Latitude: 39.5169

Lowest Avg Temperatures (F): 5 to 10

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Wooden Chicken Coop

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Map of the Port Penn Area

All Towns In DE

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Reusable Grow Bags

Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.

Steel Hori Hori Weeding Knife

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Deluxe Plastic Watering Can

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Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

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.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Brass Watering Can

Elegant brass watering can with classic design and durability.

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 Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

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