Delaware Soil Testing Program

The UD Soil Testing Program is OPEN

Providing accurate analyses and unbiased
interpretations to clients since 1947.

Soil Testing Fees to Increase Effective August 1, 2020

The changes are necessary due to increasing costs for labor and supplies. Fees were last increased in 2013.

  • The routine soil test for home gardens, lawns and landscapes (with lead screening) will now cost $17.00 per sample.
  • The routine soil test for commercial agriculture or professional landscapers will increase to $14.00 per sample.

A full listing of our new fee schedule can be found in our 2020 Fee Schedule. As is our longstanding policy, soil test kits which have already been purchased will be processed when received for no additional charge. We thank you for your continuing support and look forward to meeting your soil testing needs in the future.

Why soil test?

Soil testing provides useful information to help people manage their land. A farmer or home gardener might have his/her soil tested to determine how much lime or fertilizer is needed to grow plants and/or avoid over-applying nutrient sources like manure. Parents might test the soil in their yard to see if hazardous amounts of lead or arsenic are present before installing a backyard playset for their children, or before beginning a new vegetable garden. Archeologists use soil testing to learn about past land use at historical sites. Scientists test soil to monitor the effects of new management practices on soil properties and environmental conditions.


Our services

  • The UD Soil Testing Program provides a variety of soil testing and educational support to farmers, homeowners and others engaged in soil management and land use. The program is offered as a public service of the College of Agriculture and Natural Resources and the Department of Plant and Soil Sciences.

  • Analyses are provided on a “Fee for Service” basis

  • Additional analytical services are available to meet the needs of researchers both within and outside of the University community. Information on additional analytical services can be found on the General Program Information page.

  • Soil fertility methods offered are appropriate for soils in the Mid-Atlantic and Southeastern United States – Delaware, Maryland, Pennsylvania, New Jersey, Virginia, District of Columbia, West Virginia, North Carolina, South Carolina, and Georgia.

How to submit a sample 

Covid -19 Update - 9/16/2020

Campus mail is back in service. You can now send samples to our normal mailing address:

University of Delaware Soil Testing Laboratory

531 S College Avenue

152 Townsend Hall

Newark, DE 19716-2170

The PO Box we have been using will be closed at the end of September however any samples in transit to that address will be delivered to us.

How to Submit Samples Without Regular Soil Test Bags

Since County Extension offices are presently closed, you may need to submit your sample(s) without the normal soil test bags. To do so, please follow the steps listed below:

1. Collect a representative sample by following the directions in the brochure "How to Take a Soil Sample"

2. Thoroughly mix each sample and place 1-1.5 cups of the mixed sample into a ziplock bag. Label the bag with your name and the sample ID (e.g., Field 6, Backyard, etc)

3. Down the appropriate information sheet from the “Soil Testing Program Forms” page at right. Complete one copy of the information sheet for each sample. Be sure that the sample ID on the bag and the sample ID on the information sheet match.

4. Enclose payment or indicate on the back of the information that you wish to pay by credit card. Checks should be made payable to the University of Delaware. If paying by credit card, DO NOT write your card number on the information sheet. Instead, list a daytime phone number and our office will contact you for payment.

5. Place the samples and information sheet in a box or mailing envelope and send to the laboratory using the following address above.

Mailer kits may also be available from local garden centers. You can call our office to see which locations near you may have kits on-hand.

Additional Questions Please call the office at 302-831-1392 or email with any additional questions you may have. We are in the office and happy to help. 

Soil and Plant Diagnostic Clinic Specimen Drop-Off Map


152 Townsend Hall
531 S College Ave, Newark, DE 19716-2170

Phone: 302-831-1392
Fax: 302-831-0605