Black Walnut Tree in Arboretum Tests Positive for Thousand Cankers Disease
Cankers and beetle feeding holes on the inner bark of a downed walnut branch. (Photo courtesy: Elizabeth Bush, Virginia Polytechnic Institute and...
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News Articles
Hidden Treasure of the Arboretum: Witch-Alder
Fall foliage close-up of a witch-alder in the Arboretum’s Woodland Garden. (Photo by Niall Dunne) BY PHIL WOOD As a retired garden designer, I...
Volunteers Help Host First Seattle Botanic Gardens’ Plant Sale
Volunteers helping shoppers at check-out in the Big Greenhouse. (Photo by Polly Teeter) BY ALICIA HAMILTON Our annual Fall Plant Sale took place at...
Helping the Recovery of North America’s Rarest Fir
Arborists Lincoln and Shea after collecting the Santa Lucia fir cones. (Photo: Joanna Long) Seattle Botanic Gardens arborists Shea Cope and Lincoln...
Growing Connections: Celebrating the Volunteers of Seattle Botanic Gardens
Volunteers and staff mingling at the 2026 Volunteer Appreciation Party. BY ALICIA HAMILTON On Monday, August 31, volunteers from across Seattle...
Symbiotic Marvels: Get to Know the Small but Mighty Lichens of the Arboretum
Figure 1: Lichens on the Ceanothus in the Graham Visitors Center parking lot, including Ramalina farinacea, Usnea species (fruticose), Evernia...
Conservation Corner: Large-Winged Wingnut
The winged fruits of Pterocarya macroptera maturing in summer. (Photo by Niall Dunne) BY CHRISTINA PFEIFFER Quietly tucked away in the Arboretum’s...
Volunteers Enjoy Field Trip to the Seattle Aquarium
BY ALICIA HAMILTON In late July, 40 volunteers from the Washington Park Arboretum, Center for Urban Horticulture, and the Seattle Japanese Garden...
Japanese Garden Reopening Soon as Master Stonemason Set to Arrive
Workers placing a protective barrier around the Japanese Garden’s prized Yamasaki Pine, prior to removal of the old wall. (Photo by Jared...
Fragrant Hydrangeas
Hydrangea luteovenosa in Rhododendron Glen at the Arboretum. (Photo by Niall Dunne) BY REBECCA ALEXANDER & NIALL DUNNE This regular column...
News Articles
Black Walnut Tree in Arboretum Tests Positive for Thousand Cankers Disease
Cankers and beetle feeding holes on the inner bark of a downed walnut branch. (Photo courtesy: Elizabeth Bush, Virginia Polytechnic Institute and State University, bugwood.org)FIRST DOCUMENTED CASE IN WESTERN WASHINGTON! This summer, Seattle Botanic Gardens...
Hidden Treasure of the Arboretum: Witch-Alder
Fall foliage close-up of a witch-alder in the Arboretum's Woodland Garden. (Photo by Niall Dunne)BY PHIL WOOD As a retired garden designer, I am always on the lookout for plants that offer multiple seasons of interest. Witch-alders (Fothergilla species and hybrids)...
Volunteers Help Host First Seattle Botanic Gardens’ Plant Sale
Volunteers helping shoppers at check-out in the Big Greenhouse. (Photo by Polly Teeter)BY ALICIA HAMILTON Our annual Fall Plant Sale took place at the Graham Visitors Center in the Arboretum last Saturday, September 19. Though it happened on a single day, the sale was...
Bulletin Stories
Hidden Treasure of the Arboretum: Witch-Alder
Fall foliage close-up of a witch-alder in the Arboretum's Woodland Garden. (Photo by Niall Dunne)BY PHIL WOOD As a retired garden designer, I am always on the lookout for plants that offer multiple seasons of interest. Witch-alders (Fothergilla species and hybrids)...
Symbiotic Marvels: Get to Know the Small but Mighty Lichens of the Arboretum
Figure 1: Lichens on the Ceanothus in the Graham Visitors Center parking lot, including Ramalina farinacea, Usnea species (fruticose), Evernia prunastri and Physcia tenella (foliose).TEXT BY KATHERINE GLEW | Photos by Richard Droker Hidden beneath the leaves and...
Conservation Corner: Large-Winged Wingnut
The winged fruits of Pterocarya macroptera maturing in summer. (Photo by Niall Dunne)BY CHRISTINA PFEIFFER Quietly tucked away in the Arboretum’s old field nursery, on the south side of Crabapple Meadow, a stately specimen of Pterocarya macroptera holds court amid a...
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