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Commercial Seed Lot Evaluations

Commercial Seed Lot Evaluations

As a service to Washington potato growers, the Potato Research Group undertakes annual Commercial Seed Lot Evaluations to ensure a high-quality, disease-free industry. Results of annual professional evaluations of commercial potato seed lots are presented on this site as well as at the annual WSU Potato Field Day each June.

Seed Lot Trial Results

(Click links for printable PDFs)

For more information about the Commercial Seed Lot planting, contact:

South Basin:

  • Tim Waters (509.545.3511)
  • Mark Pavek (509.335.6861)
  • Zach Holden (509.335.3452)

North Basin:

  • Carrie Huffman Wohleb (509.754.2011)
  • Mark Pavek (509.335.6861)
  • Zach Holden (509.335.3452)
Other resources

United States Standards for Grades of Seed Potatoes – a USDA reference publication.


Addresses and travel directions

WSU Pullman
Dept. of Horticulture
149 Johnson Hall
P.O. Box 646414
Pullman, WA 99164-6414

WSU Othello IAREC
1471 W. Cox Rd.
Othello, WA 99344