State-by-State List of Soil Testing Labs at Cooperative Extension Offices
Cooperative Extension Offices – Most state universities provide an excellent and affordable soil testing service through their Cooperative Extension Service. In many cases, you get both soil testing and fertilizer/amendment recommendations based on the test results and the crop/plants you’re growing in the area that was tested.
Before collecting a soil sample for testing, don’t forget to read our explanation of how, why, and when to take soil samples.
Here are links to the soil testing services for state universities across the country. In cases where the university doesn’t provide soil testing, there’s information about alternative options that they recommend. You’ll find a lot of useful information on these pages!
CT – University of Connecticut – Soil Testing Program (listed by county)
RI – University of Rhode Island Soil Testing Program ( in conjunction with UMass)