Plant Zones in Oklahoma: Understanding Your Growing Environment

Knowing your plant zone in Oklahoma is essential to understanding the growing environment your plants will be subject to. The USDA Plant Hardiness Zone Map divides the United States into 11 main climate zones based on average annual minimum temperatures. Oklahoma falls within Zones 6a, 6b, 7a, 7b, 8a, and 8b.

Climate Zones in Oklahoma

Oklahoma's climate varies widely throughout the state, so different parts of Oklahoma fall into different climate zones. From the Panhandle to the southeastern corner of the state, Oklahoma terrain and weather can be dramatically different.

Zones 6a and 6b are found in the northwestern and western parts of Oklahoma where winters can be severe, and plants might experience sub-zero temperatures. Zone 7a covers the central and southwestern parts of the state and features a more moderate climate with occasional winter lows of 0-5 degrees Fahrenheit. Zone 7b is located in the southernmost parts of Oklahoma, including areas around Lawton and Ardmore, and features milder winters in the 5-10 degree Fahrenheit range.

Zone 8 covers most of the southeastern part of Oklahoma and has a subtropical climate. Highs in the summer can be regularly in the 90-degree range, and winters are mild with average lows around 15-20 degrees. Zone 8a is the western portion of the southern half of the state, including areas like Tulsa and Oklahoma City. Zone 8b is the eastern portion of the southern half of the state, including areas like McAlester and Durant.

What Plants are Best Suited for Your Oklahoma Climate Zone?

The USDA Hardiness Zones give gardeners the information they need to determine the plants' hardiness that will survive, especially during insanely cold winters. Oklahoma gardeners should aim to select plants that can withstand harsh summers, as well as unpredictable weather patterns.

Zones 6a and 6b require plants that can withstand cold winters and sudden temperature changes. These zones are great for perennial and ornamental grasses, including the Red Switchgrass, Purple Love Grass, and Big Bluestem. Zone 7a is well suited for plants like the Scarlet Sage, Pincushion Flower, and Coneflower. Zone 7b is perfect for the beautyberry or the pineapple sage.

Zones 8a and 8b have much milder winters, making it easier to grow less hardy plants. Gardeners in these zones can experiment with more tropical plants, including hibiscus, crotons, and bromeliads. However, it's vital to keep in mind that the hot, humid summers can also be challenging on some flowers, so plants that can withstand temperatures in the mid-90s are ideal.

How to Create a Garden Suitable for Your Plant Zone

Creating a garden in Oklahoma is a great way to grow your own food, enhance your property's beauty and have fun doing it. But if you want your garden to thrive and survive in your particular Oklahoma plant zone, you need to choose the right plants that complement the existing soil condition and climate.

Soil enrichment is an essential element to building a good garden in Oklahoma. Dig coffee grounds or other composting materials and work it into the soil. It will add nitrogen and organic matter to the soil, which is crucial for growing healthy plants.

One of the best gardening tips for Oklahoma as well as any growing climate is to create raised beds. A raised garden of four to six inches can do wonders for growing vegetables, flowers, and other plants. Raised beds help to ensure good drainage for your plants and also provide a more controlled environment for your plants.

The Bottom Line

Understanding the plant zones in Oklahoma is key to growing a beautiful garden. With the right information, Oklahoma gardeners can take advantage of the state's rich soil and favorable growing environments, which can lead to healthy and abundant growth. Whether you're a novice just starting or a seasoned gardener, Oklahoma has tons of plants that fit your needs.