At Sunday, we believe that a better lawn means a better planet for all of us, and we know that the work we do in our backyards is just the beginning. As a 1% for the Planet business, we donate a portion of every sale to helping people reconnect with nature and preserve important habitats, including organizations like the Joseph H. Williams Tallgrass Prairie Preserve.
The largest protected tallgrass prairie on Earth
At nearly 40,000 acres, the Joseph H. Williams Tallgrass Prairie Preserve in Osage County, Oklahoma, is the largest protected tallgrass prairie on Earth. More than 700 species of plants, 300 species of birds, and 80 types of mammals call this prairie home, including 2,500 free-ranging bison.

This intricate ecosystem stretches for 60 square miles, which is just a fraction of the space that it used to occupy. Once, tallgrass prairie was one of the largest ecosystems in all of North America, with a complex cultural history dating back centuries.
Why the tallgrass prairie matters
By partnering with the preserve, we can support them as they work to maintain and protect this biologically diverse and rich landscape. To date, more than 200 scientific publications have come from research conducted at the preserve.
And it doesn't provide a home to thousands of animals and plants. The tallgrass prairie also serves as a carbon storage bank, sequestering carbon in its soil. This can help mitigate the effects of climate change and contribute to clean air and clean water.
Beyond carbon sequestration, tallgrass prairies provide a variety of other benefits to the ecosystem:
- Flood management and abatement
- Water filtration
- Support for pollinators like birds and butterflies
- Soil health and biodiversity
From prairie soil to your backyard
We know that healthy lands start from the ground up, literally. We work with other groups to improve soil health, reduce pesticides that could get into our waterways, and conserve key habitats like prairie grasslands.
We believe in supporting fully integrated ecosystems, not just in a unique setting like the tallgrass prairie but also in our very own backyards. After all, it's the same soil that gives life to these places that are so important to us. And with a more thoughtful approach to our lawns, we believe that together, we can have a positive impact on people and the planet.
Want to make an impact with your lawn?
Every Sunday plan supports prairie conservation through our 1% for the Planet partnership. Get started with a custom lawn plan today.
Your lawn contributes to tallgrass prairie conservation
This partnership reaffirms how important our customers are. Every Sunday lawn care plan helps fund the restoration and preservation of the remaining American tallgrass prairie. Read our latest Impact Report to learn how your yard directly contributes to conserving more and wasting less.
Check out the full video on Why We Protect The Tallgrass Prairie to learn more about how your lawn contributes to protecting this critical ecosystem.



















