The UNH Plant Diagnostic Lab is accepting samples!
Reach out with any questions to unh.pdl@unh.edu or 603-862-3043.
Please note:
- No cannabis samples at this time
- If you are interested in a particular molecular test, please contact the lab first to see if it is available.
- Expect 7-10 business days for results. Reports will be emailed to the address provided on the form. Be sure to check your spam folder for the report and call/email with any questions!
Each sample must include a sample submission form and the $20 sample fee.
Download Sample Submission Form
Getting Your Samples to Us
Mail
UNH Plant Diagnostic Lab
Barton Hall
34 Sage Way
Durham, NH 03824
Drop Off
Barton Hall is open to the public daily from 8 a.m. - 5 p.m. Monday-Friday. Follow the signs & head upstairs to Barton 206. You may leave your plant sample with a form with anyone in the lab OR leave it in the blue sample drop off boxes outside of the lab door.
Do not drop off plant samples in the soil drop off box outside of Barton Hall. We are unable to process plants samples from that box because they degrade too quickly.
Ask Questions, Explore Opportunities, Get Ideas.
Staff specialists and Master Gardeners help connect you with the resources and expertise of the University of New Hampshire.
- Call: 1-877-EXT-GROW (398-4769)
- Email: answers@unh.edu
- Walk in: 329 Mast Rd, Ste 115, Goffstown, N.H. (Call first to confirm given COVID restrictions)
- Social Media: Facebook, and Instagram
- Sign up for the Newsletter: Granite State Gardening
- Podcast: Granite State Gardening
Articles
This position is based at UNH's campus in Durham, N.H.
The Plant Pathology Program Manager will work under the general direction of the Plant Diagnostic Lab director and Extension’s Food and Agriculture Pr...
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What do you do when you encounter a plant problem such as disease or abnormal growth in the landscape? You or a client may find a problem occurring w...
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Bo Liu, Ph.D., joins UNH Extension as the Director of the UNH Plant Diagnostic Lab and State Extension Specialist
UNH Extension is pleased to welcome Bo Liu, Ph.D., as our Plant Diagnostic Lab Director and State Specialist.
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Events
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January 17, 2024, 5 p.m. - 8:30 p.m.
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January 25, 2024, 9 a.m. - 3 p.m.
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February 7, 2024, 8 a.m. - 3 p.m.
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March 19, 2024, 7 a.m. - 4:30 p.m.
Resources
Exobasidium leaf and fruit spot of blueberry is a fungal disease affecting both leaves and berries. Symptoms matching this disease were reported in se...
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Leaf spot is one of the important fungal diseases on cherry trees in the United States. The disease mainly affects the leaves; the pathogen will cause...
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Several celery samples from high tunnel production with leaf curl have been identified by the UNH Plant Diagnostic Lab; this disease causes significan...
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How to package different types of samples (leaves, branches, whole plants), what to include in the package (plant sample, completed form, payment), an...
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These pages provide current weather information with downloadable weather graphs.
Belknap County (Moulton Farm)
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Belknap County (Moulton Farm)
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The apple maggot (Rhagoletis pomonella) is one of the most important economic insect pests of apples in New Hampshire. This native insect is also know...
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