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Washington State University

Coronavirus COVID-19

COVID-19 Advisory: WSU Extension is working to keep our communities safe. All Extension programming is being provided virtually, postponed, or canceled. Effective March 16, 2020, WSU Extension county offices and WSU Research & Extension Centers will be closed to the public. We are available via email, phone, and webconference.

Horticulture Professionals


Commercial Diagnostic Services

You may send commercial samples for diagnosis directly to the WSU Puyallup Plant Clinic and Diagnostic Laboratory. We no longer have a professional diagnostician on staff and WSU regulations do not allow Master Gardeners to answer commercial diagnostic questions.

Private Pesticide Applicator License

Information about pesticide applicator licensing is available from the Washington State Department of Agriculture. Study materials may be purchased at our office and some of the exams are also given at our office. Review the schedule and then call 1-877-301-4555 to make an appointment.

Horticultural Professional Training

Covid-19 Impact

In 2021, we expect to offer the same Horticulture Training that Master Gardeners receive without the volunteer commitment of becoming a Master Gardener. Details are still being worked out, but the plan is for the classes to be held online Saturday mornings January through April. Additional details will be announced on this page as they are decided. To be notified when applications become available, please send an e-mail to Master Gardener Coordinator Howard Voland (email).

Horticulture Professional Training that is offered in conjunction with the annual Master Gardener Training, is expected to resume in 2022.