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SEFS Faculty Meeting (11:30am - 12:30pm)
Agenda.
Contact: Mary Keyes: mkeyes2@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Tuesday, November 25, 2025, 11:30 AM – 12:30 PM.
Winkenwerder 105.
SEFS Faculty Meeting (11:30am - 12:30pm)
Contact: Mary Keyes: mkeyes2@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Tuesday, December 2, 2025, 11:30 AM – 12:30 PM.
Winkenwerder 105.
Washington Native Trees Tour
This lunch break tour guided by UW Alum Theodore Hoss offers a chance to meet a few of the incredible native trees growing right in the middle of campus! On this tour we will meet the Douglas-fir, Western Redcedar, Western White Pine, and more. We will also dive into the human connections we share with these trees, and discover their place in the local environment.
All campus tree tours take place outdoors, so please dress for the weather. To register, please visit our registration form. For more information, please visit the UW Campus Tree Tours Website.
Contact: tdhoss@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Tuesday, December 2, 2025, 12:00 PM – 1:00 PM.
Husky Union Building (HUB) - 4001 E Stevens Way NE, Seattle, WA 98195.
Fish and Wildlife Seminar Series: Sierra Gillman - Environmental drivers of long-term at-sea population change in marbled murrelets and their conservation implications
.
Contact: ndamato@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Tuesday, December 2, 2025, 4:00 PM – 5:00 PM.
Zoom - https://washington.zoom.us/j/4432362511.
For more info visit washington.zoom.us. Forest Bathing (in-person)
Cost: $25
Advance registration required.
REGISTER ONLINE
Join UW Botanic Gardens and Cascadia Forest Therapy for a unique forest bathing opportunity in the Washington Park Arboretum. Forest bathing (or shinrin-yoku) has been popular in Japan for decades and is gaining momentum in the US. The practice encourages you to move in nature at a slower pace and take in the atmosphere around you. Multiple scientific studies have shown that the practice lowers stress and blood pressure levels, while increasing immune system functioning, making you more resilient to diseases and illness.
During this class the guide, in partnership with the forest, will offer an evolving series of invitations crafted to help participants slow down and open their senses. The opening of one’s senses encourages mindfulness, which readies the heart and mind to be fully present in the natural world. Come discover the medicine of being in the forest.
Accessibility: These sessions are slow-paced and generally cover less than a mile of trail.…
Event interval: Single day event. Campus location: Washington Park Arboretum (LNDMK-8). Accessibility Contact: urbhort@uw.edu. Presenter: Cascadia Forest Therapy. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_ea7405962d79.
Saturday, December 6, 2025, 10:00 AM – 11:30 AM.
For more info visit apps.ideal-logic.com. Botanical Print-Making Holiday Card Workshop
Cost: $45
Limited financial aid slots offered on a first-come, first-serve basis. REGISTER ONLINE, Come make your own unique holiday cards and gift tags through an exploration of mixed media printmaking! Explore the patterns and textures of plants through print-making processes. This class will invite you to use natural materials, like fallen leaves & conifer needles, to create one-of-a-kind holiday cards to give to your loved ones this holiday season. All class supplies are provided.
Instructor Dillyn Adamo is a print-maker and arts educator in Skagit County, WA. Currently she works as the Learning & Engagement Coordinator at the Museum of Northwest Art, where she creates arts experiences for visitors of all ages. She has a passion for both biology and fine arts, and uses print-making as a way to explore both of these interests.
Event interval: Single day event. Campus location: Douglas Research Conservatory (DRC). Accessibility Contact: urbhort@uw.edu. Presenter: Dillyn Adamo. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_a0b9460a6be5.
Saturday, December 6, 2025, 1:00 PM – 3:00 PM.
For more info visit apps.ideal-logic.com. Washington Native Trees Tour
Join us for this free campus native trees tour! SEFS very own Theo Hoss will be guiding this tour. The evergreen state is known for staying green throughout the cold gray months, so what better way to kick off winter by learning about our beautiful native trees of Washington that are keeping things vibrant this chilly season. This tour will introduce participants to some of our most iconic conifers, as well as a few of the deciduous broadleaf varieties.
Contact: tdhoss@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Sunday, December 7, 2025, 1:00 PM – 3:00 PM.
Meet at the front entrance of the Burke Museum (parking lot side).
For more info visit sites.google.com. SEFS Faculty Meeting (11:30am - 12:30pm)
Contact: Mary Keyes: mkeyes2@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Tuesday, December 9, 2025, 11:30 AM – 12:30 PM.
Winkenwerder 105.
SEFS Social
SEFS Socials are chance to step out of your classroom, laboratory, or office to enjoy some light refreshments & connect with other SEFS faculty, students, & staff!
Contact: sefsmain@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Wednesday, December 17, 2025, 9:00 AM – 10:00 AM.
1st floor hallway in Bloedel Hall.
Evergreen Trees Tour
By January, winter is well and truly here, but that doesn't mean we can't go looking at trees! Come join UW Alum Theodore Hoss for a chance to learn about the many trees on campus who persist in staying green even in spite of the gloomy gray, and take a chance to spend some time in the outdoors. We can't promise it will be sunny, but we can promise you'll learn lots about our most hardy campus trees. All campus tree tours take place outdoors, so please dress for the weather. To register, please visit fill out our registration form. For more information, please visit the UW Campus Tree Tours Website.
Contact: tdhoss@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Sunday, January 11, 2026, 1:00 PM – 3:00 PM.
Meet at the front of Denny Hall.
For more info visit docs.google.com. Master Pruner - Full Series (online)
Cost: $350 for current PlantAmnesty Members, $410 for non-members
Financial aid slots available on a first-come, first-served basis, REGISTER ONLINE
Sign up for the whole Master Pruner Series at once and receive a series discount! This lecture series, offered twice annually in partnership with PlantAmnesty, is designed for those who work in landscape maintenance. Each lecture provides information on tools and techniques for quality pruning with better long-term results and customer satisfaction. The series runs every Thursday for 6 weeks, January 22nd - February 26th, with 2 lectures on each Thursday at 9:30am-11:30am and 12:30pm-2:30pm. Registration for the full series closes the first date of the series, January 22nd, 2026; registration for individual classes will still be available.
The Master Pruner Full Series includes all 12 Master Pruner lectures as a bundle. Individually, each class is $35 for PlantAmnesty Members and $75 for non-members. Registering for the full series earns PlantAmnesty members…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Ellie Bender, Christina Pfeiffer, Bess Bronstein, Keith Dekker, & Ingela Wanerstrand. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_2606a9faa346.
Thursday, January 22, 2026.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Tree Pruning I (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
Pruning trees makes sense when you understand the science behind it. You will be introduced to the basics of tree biology and structure, tree responses to the basic types of pruning cuts, and pruning standards and best management practices. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2.
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Ellie Bender. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_2606a9faa346.
Thursday, January 22, 2026, 9:30 AM – 11:30 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Shrub Pruning I: The Friendly, Fearless, and Forgiving (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
Learn the basic pruning cuts, basic shrub habits, and how to identify good pruning objectives (why prune?). Learn about best pruning methods based on the natural growth habit of plants like nandina, tall Oregon grape, lilac, deciduous and evergreen azaleas, red flowering currant, camellia, Burkwood x osmanthus, kinnikinick, and yews. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA - 2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2
Instructor Christina Pfeiffer is a horticulture consultant and educator with over 40 years’ experience in landscape horticulture. She brings an emphasis on sustainable garden practices that work in sync with nature to her classes. She holds degrees in horticulture from Michigan State and the University of Washington, and is an ISA Certified Arborist ®. For Christina, the next…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_905569f320a4.
Thursday, January 22, 2026, 12:30 PM – 2:30 PM.
For more info visit apps.ideal-logic.com. Soil Science - Full Series
Cost: Full Series 15% Discount - $230.00
REGISTER ONLINE, Financial aid slots available on a first-come, first-served basis.
Join us in our series Getting Down to Earth: Understanding soils for ecosystem resilience and repair to learn about the properties of soil, the ecology of soil in its microclimate and larger environment, and how to manage and remediate soil for your restoration site. These classes were developed and are instructed by Christina Pfeiffer and Rodney Pond and are a part of UW Botanic Garden’s Ecological Restoration for Professionals program. This series will be beneficial for those working in ecological restoration, landscape professionals, landscape architects and designers, and natural area stewards. Home gardeners are welcome as well!
The Soils Science - Full Series includes all 6 soils science classes: Scratching the Surface: Soil Formation, Structure, and Chemistry , Buried Alive!: Digging into Soil Biology and Ecology , Soaking It All In: Understanding Soil Water , Getting into the…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer and Rodney Pond. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_38813016038f.
Tuesday, January 27, 2026, 9:00 AM – 11:15 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Scratching the Surface: Soil Formation, Structure, and Chemistry (online)
Cost: $45
REGISTER ONLINE, Financial aid slots available on a first-come, first-served basis.
Class 1 of 6. Students will be introduced to the format of the class series and learn the essential basics of soil science; how they are formed, their physical properties and chemistry. Students will be provided and introduced to soil management plan and soil assessment worksheets to develop for their own project sites. Instructors will give demonstrations of soil properties assessment techniques to be performed as homework at their project sites. Getting Down to Earth: Understanding soils for ecosystem resilience and repair - About the Series
Understanding soils – what they are, how they function, how they degrade, and how to steward them back to health – empowers restoration professionals to design and implement more resilient and self-sustaining ecosystem restoration projects. This series of classes will build from the ground up a holistic knowledge of soils that will enable students to understand how and when…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_fcd880cec112.
Tuesday, January 27, 2026, 9:00 AM – 11:15 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Tree Pruning II (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
This class will show you how, what and when to apply a specific pruning system. This class will cover the natural pruning system, including structural pruning of young trees, as well as mature tree pruning techniques (crown cleaning, crown thinning, crown raising, crown reduction). More formal systems including pollarding, espalier, and pleaching are also covered. Pruning cycles and seasonal timing are discussed. Mal-pruning is defined (tree topping, lion’s tailing, over thinning), and rehabilitative pruning techniques are explained. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2.
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Ellie Bender. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_8b81ad49c406.
Thursday, January 29, 2026, 9:30 AM – 11:30 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Gardening with the Seasons: Winter (online)
Cost: $25
Financial aid slots available on a first-come, first-served basis, REGISTER ONLINE, Though it seems there isn't much to do in the garden over winter, dormant season tasks can set the stage for a good gardening year. When weather keeps us indoors, we can plan ahead for tasks and garden changes to be done in the months ahead. When the weather is nice enough to spend time outdoors, it can be amazing how much we can actually take care of now. This session will cover dormant season pruning and transplanting for specific plant types, winter weeding and garden care, best tools and practices, and planning ahead for the new growing season.
About this series:
Plants and gardens don't live by the written calendar, but by the seasonal cycles and cues of changes in daylight, temperature, and moisture. When gardeners become acquainted with the seasonal rhythms and life cycles in the garden, and learn to work in sync with nature, caring for the garden becomes more of a process and less of a battle with potential…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_363dfa8fbfb5.
Thursday, January 29, 2026, 7:00 PM – 8:30 PM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Buried Alive!: Digging into Soil Biology & Ecology (online)
Cost: $45
REGISTER ONLINE, Financial aid slots available on a first-come, first-served basis.
Class 2 of 6. We will explore the realm of soil biology, its web of interdependence that creates soil ecology, and how a healthy soil ecosystem builds the foundation of whole ecosystem health and resilience. Emphasis will be made on the relationship between soil biology, physical properties, and chemistry. Soil and landscape stewardship practices and their impacts on soil biology will be introduced. Instructors will provide a soil biology assessment work sheet and review key observations that indicate soil ecosystem health. Getting Down to Earth: Understanding soils for ecosystem resilience and repair - About the Series
Understanding soils – what they are, how they function, how they degrade, and how to steward them back to health – empowers restoration professionals to design and implement more resilient and self-sustaining ecosystem restoration projects. This series of classes will build from the ground up a…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer & Rodney Pond. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_65ab7912b6a5.
Tuesday, February 3, 2026, 9:00 AM – 11:15 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Pine Trees Tour
Sometimes it seems like Pine Trees are all over the place and it's because they are! The Pine family has more species than any other family of conifer, including some of the oldest, tallest, and most economically important trees on the planet. Come join us for a lunch break tree tour and spend an hour with UW Alum Theodore Hoss getting to know some of the specimens around the Denny and Parrington Lawns on the UW Campus! All campus tree tours take place outdoors, so please dress for the weather. To register, please fill out our registration form. For more information, please visit the UW Campus Tree Tours Website.
Contact: tdhoss@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Wednesday, February 4, 2026, 12:00 PM – 1:00 PM.
Meet at the front of Denny Hall.
For more info visit docs.google.com. Master Pruner: Shrub Pruning III: The Puzzlers and Consequences (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
This class covers how to prune rhododendron, hydrangea, callicarpa, Viburnum bodnantense, and abelia. Included in this class are basic pruning techniques, common pruning mistakes, and corrective pruning strategies. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2.
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Ellie Bender. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_cf206708e6f0.
Thursday, February 5, 2026, 9:30 AM – 11:30 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Corrective Pruning (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
This class covers how to restore the natural shapes of trees and shrubs that have been mal-pruned. Students attending this class should already be familiar with principles of selective pruning. Included are discussions of water-sprouts, suckers, radical renovation techniques, and crown restoration. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2
Christina Pfeiffer is a horticulture consultant and educator with over 40 years’ experience in landscape horticulture. She brings an emphasis on sustainable garden practices that work in sync with nature to her classes. She holds degrees in horticulture from Michigan State and the University of Washington, and is an ISA Certified Arborist ®. For Christina, the next best thing to being in the garden is teaching and…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_aea487e8e1df.
Thursday, February 5, 2026, 12:30 PM – 2:30 PM.
For more info visit apps.ideal-logic.com. Arboretum Lichens
Cost: $45
Limited financial aid slots offered on a first-come, first-serve basis.
REGISTER ONLINE
Lichens grow on trees, shrubs and rocks in botanic gardens and can tell us about air quality and the make-up of plants and geology. Botanic gardens can take on new meaning as a *fun* place to observe a symbiotic organism made up of a fungus and algae. You will also learn about common lichens found in an urban environment and take home a user-friendly chart that lists lichens found in your neighborhood.
Lichens are harmless to your plants and add aesthetic value to trees and shrubs. We can actually use them as indicators of air pollution! Join Dr. Katherine Glew at the Washington Park Arboretum to get a head start on learning lichens from one of Seattle’s botanic gardens. You can enjoy the late winter/early spring season by looking for lichens, rather than staying inside and missing out on the excitement of being outside!
Instructor Katherine Glew, Ph.D. is Curatorial Associate of Lichens at the University of…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Katherine Glew, Ph.D. Curatorial Associate of Lichens at the UW Herbarium, Burke Museum. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_9a781a534777.
Saturday, February 7, 2026, 10:00 AM – 12:00 PM.
Washington Park Arboretum.
For more info visit apps.ideal-logic.com. Conifer Trees Tour
Coniferous trees define the forests of western Washington, but have you ever noticed that most other forests of the world are completely lacking these cone bearing trees? Come find out why that is with UW Alum Theodore Hoss, and learn all about the 8 families of coniferous trees that grow on planet earth. We will cover a variety of conifers from all over the globe and learn to identify the different families based on their shared traits and preferred habitats. All campus tree tours take place outdoors, so please dress for the weather. To register, please fill out our registration form. For more information, please visit the UW Campus Tree Tours Website.
Contact: tdhoss@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Sunday, February 8, 2026, 1:00 PM – 3:00 PM.
Husky Union Building (meet by the Husky statue).
For more info visit docs.google.com. Soaking It All In: Understanding Soil Water (online)
Cost: $45
REGISTER ONLINE, Financial aid slots available on a first-come, first-served basis.
Class 3 of 6. We will dive into exploring how water enters, moves, and gets stored in soils and the relationship between levels of soil moisture and ecosystem function. Topics will include how topography influences water movement, soil physical and chemical properties control soil water storage, and field methods for assessing soil water holding capacity and drainage. Irrigation tools and best management practices will be reviewed. Getting Down to Earth: Understanding soils for ecosystem resilience and repair - About the Series
Understanding soils – what they are, how they function, how they degrade, and how to steward them back to health – empowers restoration professionals to design and implement more resilient and self-sustaining ecosystem restoration projects. This series of classes will build from the ground up a holistic knowledge of soils that will enable students to understand how and when to choose soil…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer & Rodney Pond. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_faed8c7deb99.
Tuesday, February 10, 2026, 9:00 AM – 11:15 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Prune and Renovate the Overgrown Landscape (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
This is a primary class of the Master Pruner course series. It covers basic pruning of ornamental trees and shrubs as well as creative solutions to the overgrown or over-planted garden. The types of pruning cuts are shown and discussed, and the concept of the 'pruning budget' is discussed for different plant and different growth types. Before and after photos and diagrams of real-life pruning examples will be used to illustrate pruning for size reduction and pruning for definition (thinning). Students will gain insight into the process of yard renovation, where pruning is but one tool in renovating a garden. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2.
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Ellie Bender. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_1095d0f40080.
Thursday, February 12, 2026, 9:30 AM – 11:30 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Fruit Tree Pruning (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
Learn the basics of fruit tree pruning and how seasonal growth differences and specific goals affect when you use different pruning approaches. Apple, cherry, plum, and pear pruning will be addressed. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2
Ingela Wanerstrand is the owner of Green Darner Garden Design and a frequent horticultural speaker.
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Ingela Wanerstrand. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_cb5cbeb85e48.
Thursday, February 12, 2026, 12:30 PM – 2:30 PM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Getting into the Weeds: Sorting out the details of soil conditions & management considerations (online)
Cost: $45
REGISTER ONLINE, Financial aid slots available on a first-come, first-served basis.
Class 4 of 6. Building up from the previous classes, we will review soil disturbance and resulting stewardship challenges commonly encountered at restoration sites such as former agricultural land, urban fill, construction sites, brownfields, and degraded natural areas. We will review how to assess for common soil disturbances as well as historical and ecological site conditions for their soil management plans. Reasons and resources will be reviewed for more technical soil testing through consultants and labs. Getting Down to Earth: Understanding soils for ecosystem resilience and repair - About the Series
Understanding soils – what they are, how they function, how they degrade, and how to steward them back to health – empowers restoration professionals to design and implement more resilient and self-sustaining ecosystem restoration projects. This series of classes will build from the ground up a holistic knowledge…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer & Rodney Pond. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_135e539bce47.
Tuesday, February 17, 2026, 9:00 AM – 11:15 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com. Master Pruner: Pruning Art or Atrocity? (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
This class covers the three main forms of mal-pruning: tree topping, inappropriate shearing of trees and shrubs, and over-thinning. Then we compare and contrast mal-pruning with bona-fide examples of pruning art: pollarding, cloud pruning, topiary, pleaching, and coppicing. The class ends on a humorous note as slides are shown of "The Good, the Bad, and the Bizarre". Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2
Instructor Christina Pfeiffer is a horticulture consultant and educator with over 40 years’ experience in landscape horticulture. She brings an emphasis on sustainable garden practices that work in sync with nature to her classes. She holds degrees in horticulture from Michigan State and the University of Washington, and is an ISA Certified Arborist…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_7ab79c4180a0.
Thursday, February 19, 2026, 9:30 AM – 11:30 AM.
For more info visit apps.ideal-logic.com. Medicinal Trees Tours
Many potent medicines around the world trace their origins back to trees. This includes both traditional medicines and those now distributed by the pharmaceutical industry! From cures for cancer to relief from hemorrhoids, join us for this lunch break tour guided by UW Alum Theodore Hoss to learn about the many benefits that trees on campus can offer us as humans. All campus tree tours take place outdoors, so please dress for the weather. To register, please fill out our registration form. For more information, please visit the UW Campus Tree Tours Website.
Contact: tdhoss@uw.edu. Accessibility Contact: sefsmain@uw.edu.
Thursday, February 19, 2026, 12:00 PM – 1:00 PM.
Meet at the bus shelter on Stevens Way just west of Anderson Hall.
For more info visit docs.google.com. Master Pruner: Japanese Garden Pruning (online)
Cost: $35 for PlantAmnesty Members, $75 for non-members
Register Online, Limited financial aid slots offered on a first-come, first-serve basis.
This class will cover pruning Japanese upright maples (fan pruning), Japanese laceleaf maples (shell pruning), pruning pines (cloud pruning) and shearing masses of lower story plants. Part of the Master Pruner Series held in partnership with PlantAmnesty.
Professional credits pending: ISA -2, APLD - 2, CPH - 2, ecoPRO -2, NALP/WALP - 2
Instructor Bess Bronstein is a horticultural consultant, a previous instructor for the Edmonds Community College horticulture program, and an ISA Certified Arborist.
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Bess Bronstein. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_2df57b8829b3.
Thursday, February 19, 2026, 12:30 PM – 2:30 PM.
For more info visit apps.ideal-logic.com. Digging In: Getting Down & Dirty into Soil Management & Remediation Techniques (online)
Cost: $45
REGISTER ONLINE, Financial aid slots available on a first-come, first-served basis.
Class 5 of 6. Conserving and building self-sustaining soils form the foundation of ecosystem restoration. Learn how a good understanding of existing site and soil conditions informs choosing best approaches to protecting intact soil ecosystems and repairing disturbed soils. Long-standing best practices as well as practices rooted in recent groundbreaking research will be covered. Working around existing native vegetation, especially trees, to protect roots, proper use of soil amendments, erosion control, and mulch will be reviewed. Getting Down to Earth: Understanding soils for ecosystem resilience and repair - About the Series
Understanding soils – what they are, how they function, how they degrade, and how to steward them back to health – empowers restoration professionals to design and implement more resilient and self-sustaining ecosystem restoration projects. This series of classes will build from the…
Event interval: Single day event. Accessibility Contact: urbhort@uw.edu. Presenter: Christina Pfeiffer & Rodney Pond. Contact Information: urbhort@uw.edu. Ticket Link: https://apps.ideal-logic.com/uwbg?key=2WSB-TGY2T_K9KH-5PTF_f146493ed2cb.
Tuesday, February 24, 2026, 9:00 AM – 11:15 AM.
Online via Zoom.
For more info visit apps.ideal-logic.com.