Soil Testing Services

  • rake in the garden

The soil testing service is open! Please read below for important sample submission updates.

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. 

Update (4/01/2022)

We have a new mailing address!  Please send all samples to the address below. Due to our relocation and construction on campus we will continue to accept samples by mail only. Please do NOT drop off a sample to the Durham campus. We apologize for this inconvenience and hope to have in-person drop off available later this summer.

*Note: If you sent your soil sample to the previous Spaulding Hall address, your sample will be forwarded to our new address and you do not need to send a new sample.

Mail all samples to: 

     UNH Extension Soil Testing Service

     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 during our busy season. For questions, please send an email to or leave a message for Shyloh Favreau at (603) 862-3200.


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


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
Fall soil testing gives you time to adjust soil pH before next year’s growing season
Fall soil testing gives you time to adjust soil pH before next year’s growing season Learn More
Given the way this winter has gone so far, it’s possible the ground will thaw soon if it hasn’t already. That gives gardeners a prime opportunity to&n... Learn More