Soil Testing, Insect ID & Plant Diagnostic Lab

Soil Testing, Insect ID & Plant Diagnostic Lab

Plant Diagnostic Lab & Plant Health  

Soil Testing 

Insect Identification

The Food and Agriculture team wants to let you know that we are still working and available to provide guidance and help during this busy season.  While face-to-face meetings and in-person programming have been curtailed, we are still working every day to help your season be a successful one. Watch for our newsletter or visit our website to get updates on upcoming programs and newly available resources.

Update (8/11/20):

The soil testing lab is now open.

 Due to COVID-19 the lab will only be accepting samples by mail until further notice. Your safety and the safety of our students, faculty and staff are our highest priority. Please do NOT drop off a sample to the Durham campus or to any county office. For more information, and to access our soil testing forms please visit the Soil Testing Services webpage here. Our staff continues to work remotely. For questions, please leave a message for Shyloh Favreau at 603-862-3200 or send an email to

Please mail all samples to:

UNH Cooperative Extension Soil Lab

Spaulding Hall - Room G28

38 Academic Way

Durham, NH 03824


The UNH Plant Diagnostic Lab is still closed for physical samples.

We are working to reopen the UNH-PDL for mail-in samples only. Please check back on the UNH-PDL webpage for updates here (

During the transition, we will continue to process digital samples for plant problem diagnosis as we have since March:

Home Gardeners:

   Please contact us via or 1-877-EXT-GROW (398-4769), photos are encouraged and may help us identify weed, disease, or insect problems you encounter.

 For commercial producers/operations only:

  • Plant samples: The Plant Diagnostic Lab is accepting digital samples sent by email to Submissions must include a completed sample submission form (fillable sample submission form) your name, phone number, email, and good, in-focus images.
  • Arthropod samples: Our staff are accepting digital samples sent by email to Submission must include your name, phone number, business name, county, where you found the specimen and good, in-focus images.


Open 8 a.m. - 4:00 p.m.
Spaulding Hall
38 Academic Way
Room G28
Durham, NH 03824

The Team