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  • UW Farm Tour with Farm Manager Perry Acworth (SOLD OUT)

    Center for Urban Horticulture 3501 NE 41st St, Seattle, WA

    Experience a vibrant hub of urban agriculture at the height of harvest season with UW Farm Manager Perry Acworth. She will guide us through this student-powered 1.5-acre production site, highlighting... Read More

  • Expedia Campus Late Summer Tour With Jeff Daley (SOLD OUT)

    Expedia Seattle Campus 1111 Expedia Group Way W, Seattle, WA

    Expedia’s Ecological Horticulturalist/Arborist Jeff Daley will guide an exclusive tour of the Expedia Group Campus on the Seattle waterfront. This is a rare opportunity to experience an invigorating approach to... Read More

  • Seattle Waterfront Tour with Richard Hartlage (SOLD OUT)

    Seattle Waterfront Park 1401 Alaskan Way, Seattle, WA

    Join us for a walking tour of Seattle’s newest and boldest urban park, led by Richard Hartlage of Land Morphology, which provided planting design services for this expansive project. The... Read More

  • Gardening Under Mature Trees with Christina Pfeiffer

    Live Webinar

    A recording of this extremely popular and useful lecture is available for purchase and viewing through October 23, 2025. Pacific Northwest gardens often boast an enviable range of conifers and hardwoods, but successfully planting underneath them can be challenging due their substantial root systems, heavy water demands and expanding shade. In addition, misunderstandings about mature... Read More

  • Dishing Dirt with Richie and Bess: Fall Gardening Made Easy

    Live Webinar

    Join horticultural experts Bess and Richie as they dig into the joys of autumn gardening. This lively webinar will highlight practical tips to keep your garden thriving through the season, and also explore perennials and grasses that shine in the fall garden, from vibrant foliage to late-season blooms. Review the essential chores that prepare your... Read More

  • Spooky Season-al Color at the Arboretum with Cynthia Welte

    Graham Visitors Center 2300 Arboretum Dr E, Seattle, WA

    “Spooky Season" encompasses all that we love as the chill of autumn approaches: the imagery and customs associated with Halloween and fall, like ghost stories, cozy sweaters, crackling leaves underfoot... Read More

  • Celebrating the Winter Garden with Warren Leach

    Live Webinar

    Drawing from decades of experience in zone 7a, landscape horticulturist Warren Leach celebrates the rewards of cold-weather gardening in “Plants for the Winter Garden: Perennials, Grasses, Shrubs, and Trees to Add Interest in the Cold and Snow” (Timber Press, 2024). The title is an American Horticulture Society Book Award Winner and is lauded for its... Read More

  • Fall Color and Practices at the Miller Garden with Maggie Rutherford (SOLD OUT)

    Elisabeth C. Miller Botanical Garden (Address will be made available to registrants two days prior to event.) Seattle, WA

    Elisabeth Miller regularly designed and selected plants for her garden with autumn interest in mind. From the first whispers of fall in September to the fading last days of the season in November, the Garden is full of color and drama. Thanks to flaming foliage and fall-blooming bulbs, as well as plants with interesting berries,... Read More