Soil Testing Services

  • rake in the garden

Trusted Analytics & Recommendations to Help You Grow

UNH Cooperative Extension provides soil analysis and fertilizer recommendations to farmers, homeowners and researchers. Recommendations are based on the latest research and are specific to the crop being grown. 

We are accepting samples both in-person and by mail!


If you are mailing in sample(s), please note that we have a new mailing address!  Please send all samples to the address below. 

Mail all samples to: 

     UNH Extension Soil Testing Service

     Barton Hall B206

     34 Sage Way

     Durham, NH 03824

Turnaround time for soil testing is approximately three weeks from the time we receive the sample(s). Thank you for your patience. For questions, please send an email to or leave a message  at (603)-862-0509.

soil drop box

**Our new drop-box is located at the front of the Sage Way visitor parking lot just to the right of Barton Hall. Please note that this drop-box is for soil samples only. All insect and plant disease samples must be sent by mail or dropped off in person.

Frequently asked questions
Location, Hours and contact information
Soil Testing Form


Cooperative Extension’s soil testing service dates back to 2005. The number of samples we process averages more than 3,000 a year. The following list ... Learn More
All forms needed for soil testing. 
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In addition to the standard analyses, soil tests may be customized to meet your individual testing needs.  At the link below, you will find a complete... Learn More

Wood ash has a long history of use in New England. Our Yankee ancestors used wood ash to make lye for soaps, to clean glas... Learn More
Lead is a naturally occurring element that is present in all soils at very low concentrations of less than 50 parts per million (ppm). Elevated levels... Learn More
Animal manures and animal manure-based composts are rich in plant nutrients such as Nitrogen (N), Phosphorous (P) and Potassium (K) and provide organi... Learn More


Renuka Mathur, Ph.D., joins UNH Extension as the State Extension Specialist for Soil Health
UNH Cooperative Extension is pleased to welcome Renuka Mathur, Ph.D., to the Food and Agriculture Team, as a Soil Health State Specialist. Renuka has ... Learn More
A Question of the Week
Even if choosing slow-release sources of Nitrogen and Potassium, fertilizer should be applied in the spring. In most New Hampshire soils, amendments c... Learn More
We have recently updated the prices of the soil & tissue tests offered by UNH Extension. We continually work to keep the program as affordable as ... Learn More