Below is a list of state extension agencies. Extension agencies can be very helpful with determining the best grasses for your area or other seeds you are wanting to plant. They can also advise on soil testing, diseases, weather information, and many other topics related to outdoor planting. If you click on the link for your state, you will often find the state extension agency has links to each county extension agency for your state.

• Alabama Cooperative Extension Service
• Alaska Cooperative Extension
• Arizona Cooperative Extension
• Arkansas Cooperative Extension Service
• California Cooperative Extension
• Colorado State University Cooperative Extension
• Delaware Cooperative Extension
• Florida Cooperative Extension Service
• Georgia Cooperative Extension Service
• Hawaii Cooperative Extension Service
• Idaho Cooperative Extension System
• Illinois Cooperative Extension Service
• Indiana - Purdue University Cooperative Extension Service
• Iowa State University Extension
• Kansas State University Extension Systems
• Kentucky Cooperative Extension Service
• Louisiana Cooperative Extension Service
• Maine Cooperative Extension
• Maryland Cooperative Extension Service
• Massachusetts Extension
• Michigan State University Extension
• University of Minnesota Extension Service
• Mississippi State University Cooperative Extension Service
• Missouri - University Extension System
• Montana State University Extension Service
• Nebraska Cooperative Extension
• University of Nevada Cooperative Extension
• New Hampshire Cooperative Extension
• New Jersey - Rutgers University Cooperative Extension
• New Mexico State University Cooperative Extension Service
• New York - Cornell Cooperative Extension
• North Carolina Cooperative Extension Service
• North Dakota State University Extension Service
• Ohio State University Extension
• Oklahoma Cooperative Extension Service
• Oregon State University Extension Service
• Pennsylvania State
• South Carolina - Clemson Univ Cooperative Extension Service
• South Dakota Cooperative Extension Service
• Tennessee Agricultural Extension Service
• Texas Agricultural Extension Service
• Utah State University Extension
• University of Vermont Extension System
• Virginia Cooperative Extension
• Washington State Cooperative Extension
• West Virginia University Extension Service
• Wisconsin Cooperative Extension
• Wyoming Cooperative Extension Service