Ask A Master Gardener

Free access to unbiased research-based horticulture advice

Bring your gardening questions to us!

Whether it’s an insect pest infestation or an unknown pathogen destroying your beloved plants, certified Master Gardeners are available to answer your questions or provide advice. Gardeners may bring plant or insect samples to the clinic.

Port Townsend ‘Ask a Master Gardener’ clinic

January-December 2025, 1st Tuesday of the Month: Port Townsend Library either in the Carnegie Room upstairs or the Charles Pink House, adjacent to the main library!

Hours of operation: noon – 2:00 p.m.
Woman holding a watermelon grown in Jefferson County

Port Hadlock ‘Ask a Master Gardener’ clinic

March-October 2025, 2nd Saturday of the month: Jefferson County Library in the Humphrey Room

Hours of operation: 1:00 – 3:00 p.m.

More Information

Need to drop off a sample?

To help Master Gardeners make an accurate assessment, you can drop off a  fresh specimen at the WSU Extension office MTWTh from 9:00 – 1:00 PM, 121 Oak Bay Road, Port Hadlock, WA.

Note: Master Gardeners need a fresh specimen to make an accurate identification or assessment of the issue. If cut plants are left in sunny or hot location they will wilt excessively thus making diagnosis very difficult.
""

Clinic Tips

For plant problem diagnosis bring a sample that clearly shows the difference between unhealthy and healthy tissue. Pick a fresh plant specimen, put the cut end of the stem in a moist paper towel, and then come to the Ask a Master Gardener workshop.

For plant identification bring a sample or picture that includes leaves, branches, stems, a portion of the fruiting or flowering structure (if available), and a picture of the stem or bark.

For insect identification bring the insect intact in a small container soon after capture.

Photo tips:

  • Show the damaged or problem plant or insect in the landscape along with other plants to provide additional clues to the probable cause of the problem.
  • Show the base of the plant at the soil line to determine root issues.
  • Show live branches/limbs and leaves, dead or dying branches/limbs and leaves to help us determine the spread.
  • Show buds and flowers to help with plant identification.
  • Show the insect if that is the suspected culprit in the damage, along with the kinds of damage you are seeing.

WSU Puyallup Diagnostic Lab

Our volunteers work hard to give you the best diagnosis/information. But when we are unable to diagnose your plant problem, you will be referred to the WSU Plant Diagnostic lab in Puyallup. Directions on how to submit your sample and the cost for plant sample analysis are found at the Plant Problem Diagnosis website.

Soil Testing

If you are having trouble in your garden and pest, disease or cultural causes don’t seem to be the reason, you may wish to get a soil test. Please visit the Jefferson County Conservation District for information on how to take samples and interpret the results at Jefferson Conservation District on Soils. Testing costs vary depending on which analyses you choose.

Master Gardener volunteers are trained para-professionals who will provide you with information that is research-based and focused on environmentally friendly gardening practices.


Gardening Resources

Free download of PNW Gardener's Handbook

Pacific Northwest Gardener’s Handbook: Growing for the Future

WSU Extension’s new, definitive gardening resource, the expanded, modernized, and regionally focused Pacific Northwest Gardener’s Handbook: Growing for the Future is a multi-year culmination of expertise covering the fundamentals of gardening as well as advanced horticultural knowledge.

This is a free download. Printing is permitted for personal use only.

""

Earn a Washington Gardener Certificate

Learn research-based techniques to create a thriving garden that also benefits our environment. From water conservation to supporting local ecosystems, discover how your gardening choices make a difference.

WA Green School | Washington State University

WA State image

Hortsense

Hortsense | Washington State University is a WSU website containing home gardener fact sheets for managing plant problems with Integrated Pest Management (IPM), including cultural controls and Washington-registered pesticides.

WA State image

The Evergreen Thumb Podcast

Join us as we invite expert horticulturists, seasoned Master Gardeners, and passionate plant enthusiasts to share their wisdom, practical tips, and hands-on experiences. Learn more about The Evergreen Thumb Podcast.

WA State image

Growing Your Own

Published by Oregon State University, Growing Your Own provides basic advice on a wide range of topics related to vegetable gardening.

Growing Your Own (English version)
Su Propio Cultivo (Spanish version of Growing Your Own)
Growing Your Own print version available to purchase

WA State image

Pestsense

Pestsense is intended to provide information on how to manage common indoor pest problems using integrated pest management or IPM.

WA State image

Grow Smart Grow Safe

Sponsored by Thurston County, Grow Smart, Grow Safe (growsmartgrowsafe.org) provides home gardener information resources including pesticide product hazard ratings, Integrated Pest Management, pesticide alternatives. 

WA State image

USDA Hardiness Zone Map

The USDA Hardiness Zone Map is the standard by which gardeners can determine which plants are most likely to thrive at a location.

WA State image

Backyard Fruit Tree Spray Schedules

Home gardeners can help protect agriculture in Washington State by properly maintaining their backyard fruit trees.

The spray recommendations for home garden fruit trees list of PDFs shows the suggested spray schedules for each tree crop.

WA State image

Rain Garden Online Training for Non-Professionals

Online training:

This is a free online self-paced introductory course to rain garden planning, construction, plant selection, and maintenance for non-professionals. The course is intended for homeowners and rain garden enthusiasts interested in managing excess stormwater on their property.

Rain Gardens | Washington State University (wsu.edu)

WA State image

Washington State University Plant Pest Diagnostic Clinic

The Washington State University Plant Pest Diagnostic Clinic is dedicated to serving the state of Washington and its citizens by providing the highest quality service by providing plant disease and disorder diagnosis, pest identification, and management strategies.

WA State image

Pest Leaflet Series

The Pest Leaf Series (PLS) was initiated in the WSU Puyallup Plant & Insect Diagnostic Laboratory to produce brief “bulletins” on problems frequently received at the laboratory, for which no formal extension bulletins or other readily available information exists. The PLS covers insect problems, diseases, abiotic problems, and other miscellaneous situations on which we are regularly asked to provide information.
Pest Leaflet Series | Plant Clinic Site | Washington State University

WA State image

Gardening in Washington State

Gardening in Washington State helps you navigate the hundreds of free Publications that WSU Extension maintains on all things gardening.

WA State image

Come learn with us!

The WSU Extension Master Gardener Advanced Education Conference (AEC) is open to all garden enthusiasts!

To further the training of volunteers and keep them abreast of cutting-edge horticultural science, the Master Gardener Foundation of Washington State partners with the WSU Extension Master Gardener Program to produce the AEC. This educational event is just one way we strive to ensure that when you reach out to your local Extension Master Gardeners, you are assured of getting innovative, unbiased, scientifically supported advice.