Runoff Now Feeds Prairie Rain Garden at Center for Urban Horticulture

May 1st, 2015 by UWBG Communication Staff
photo

Malcolm Howard standing in the prairie rain garden in its first spring after planting, looking west across the Union Bay Natural Area.

What to do about muddy puddles caused by rain runoff in the middle of a trail used by hundreds of people every day? Could a garden solve the problem?

Masters of Environmental Horticulture graduate student Malcolm Howard choose this problem area as his MEH project. He explains how the site was chosen: “The rain garden was placed along the trail to intercept runoff from the nearby parking lot. Instead of water ponding on the trail after rains, the rain garden helps retain this runoff and convey the remaining water under the trail.”

The prairie rain garden was installed just south west of the parking lot that is on the west side of Merrill Hallat the Center for Urban Horticulture. The trail leads to the popular Union Bay Natural Area where visitors enjoy watching birds and feeling immersed in a wild place.

What does Malcolm expect to accomplish with the Prairie Rain Garden? “I hope that the garden can help improve trail conditions, while displaying some interesting native prairie plants for people to enjoy and learn about.”

The Prairie Rain Garden received a small project grant from the UW Sustainability Fund in January 2015.

Prairie Rain Garden Summary with plant list.

What and Where is the Sino-Himalayan Hillside?

May 1st, 2015 by Sasha McGuire, Education Program Assistant
Photo Credit: Scott Zona

Illicium henryi (Henry’s Star Anise)-found on the Hillside. Photo Credit: Scott Zona

Take a closer look at this often overlooked collection from the higher elevations of Western China and the Himalayan foothills. This area of the Arboretum, right off of Azalea Way, showcases some unique and unusual plants, and contains tremendous diversity. A great number of garden-worthy plants that thrive in the Pacific Northwest can be found here as well. You may even get some new ideas for your garden!

Plants found here include Osmanthus, Lithocarpus, Rhododendron, Stachyurus, and Illicium.

Ray Larson, UW Botanic Gardens Curator of Living Collections, will lead you on a journey through some of the most interesting plant collections in the Washington Park Arboretum. Learn about rare and unusual plants, collections based on genetics and eco-geographic habitats, and unusual stories of how these plants have made their way to us over the years. Each class will include both a presentation and walk through the collections.

What: A Closer Look: Sino-Himalayan Hillside
When: Tuesday, May 5th, 6:30-8pm
Where: Washington Park Arboretum, Graham Visitors Center
Cost: Just $5!
How: Register online, or by phone (206-685-8033)

 

New Workshop: Learn to Inspire Action that Supports Urban Forests

April 24th, 2015 by Jessica Farmer, Adult Education Supervisor

 Building Support for Urban Forests
Using a Social Marketing Approach

Thursday, June 18, 8:30am – 4:30pm

Fall Color
UW Botanic Gardens Center for Urban Horticulture
3501 NE 41st St., Seattle, WA 98105
Registration fee: $125, lunch included
Contact: urbhort@uw.edu, 206.685.8033

Register online!

 

Communicating the value of healthy urban forests, inspiring desired actions, and securing adequate support can be very challenging in today’s atmosphere of limited budgets and competing priorities.

This workshop is designed to empower urban forest managers and advocates with effective marketing tools that will influence target audience behaviors and inspire actions to protect the environment.

Participants will use a 10-step strategic planning model to:

  • Select target audiences
  • Prioritize desired behaviors
  • Identify audience barriers, benefits and motivators
  • Develop a strategic marketing mix that produces desired outcomesNancy-Lee

Nancy Lee, president of Social Marketing Services Inc., an adjunct faculty at the UW Evans School of Public Affairs, and co-author of Social Marketing: Changing Behaviors for Good, will lead this full-day intensive workshop. Lee has been a consultant for more than 150 nonprofit and public sector agencies and has participated in the development of more than 200 social marketing campaign strategies.

 

What is Social Marketing?

Social marketing seeks to develop and integrate marketing concepts with other approaches to influence behaviors that benefit individuals and communities for the greater social good. It seeks to integrate research, best practice, theory, audience and partnership insight, to inform the delivery of competition sensitive and segmented social change programs that are effective, efficient, equitable and sustainable.

Sponsers:

forterra_logo

 

Trillium Tea, Talk, and Tour

April 20th, 2015 by Sasha McGuire, Education Program Assistant

Trillium TeaTrilliums are beautiful wildflowers that often bring back fond memories of walking through the woods in early spring. Tour Cottage Lake Gardens, which has all 48 species of the world’s trilliums and is one of the only places in the world you can see them all growing in one place.

The exciting event begins with an indoor tea enjoying light refreshment using vintage trillium china. Guests then listen to a talk describing their fascinating evolution, descriptions of the different types, how to grow them in your own garden along with many beautiful photos of the most popular species. By the end of the talk everyone is so excited about trilliums that they can’t wait to go outside and tour the Trillium Trail. Afterwards trilliums and other companion plants will be available for purchase. We will meet at Cottage Lake Gardens.

What: Trillium Tea, Talk, and Tour
When: Tuesday, April 28, 2015 from 10am-1:30pm
Where: Cottage Lake Gardens, Woodinville, WA
How Much: $20; $25 after April 21st

Register online, or call 206-685-8033

 

Our 2014 Trillium Tour!

Our 2014 Trillium Tour with our host Susie Egan!

April Color Appears at the Washington Park Arboretum

April 19th, 2015 by UWBG Horticulturist
Selected cuttings from the Washington Park Arboretum (April 13 - 26, 2015)

Selected cuttings from the Washington Park Arboretum (April 13 – 26, 2015)

1)  Acer cissifolium        Vine-leaf Maple

  • A three-leaf maple native to Japan.
  • The extraordinary racemes of tiny flowers give the tree a cloud-like appearance.
  • Located in the Asiatic Maple Collection.

2)  Acer rubrum        Red Maple

  • This popular street tree is native to eastern North America.
  • On this sample the petals have fallen, leaving the elongating peduncles and their tiny, immature samaras.
  • Located in grid 3-5E on Arboretum Drive.

3)  Cornus florida        Flowering Dogwood

  • Named for its showy bracts.
  • Native to the eastern United States.
  • These cuttings are from ‘Royal Red’ near the south end of Azalea Way and from an unlabeled white cultivar near the north end.

4)  Cornus nuttallii        Pacific Dogwood

  • A west coast native named for Thomas Nuttall– a British botanist and explorer.
  • Natural seedlings are scattered throughout the Arboretum.
  • This is the provincial “flower” and floral emblem of British Columbia.

5)  Cornus nuttallii x florida    ‘Eddie’s White Wonder’

  • So named because it was one of a few survivors of a flood at Henry Eddie’s nursery near Vancouver, B.C.
  • It is a hybrid of Cornus nuttallii and C. florida.
  • Several specimens are growing along Azalea Way.

Another collection stunner blooming now

April 19th, 2015 by Catherine Nelson, Adult Tours Program Assistant

RhododendronoccidentaleAlong Azalea Way this time of year, as many of you know, the Rhododendron cultivars, Redbuds & Dogwood Trees are putting on their show of stunning blossoms.   Amongst all these flowering shrubs and trees it is sometimes hard to discern any individual plants, but its always worth it for me to stop at the group of Rhododendron occindentale at the North end of Azalea Way.   These Rhododendron species, commonly known as Western Azalea, get my attention because in addition to the clusters of pretty flowers (and unlike most Rhododendron species) they have a wonderful scent.  My nose could spend a lot of time near these shrubs.  This grouping of about 10 shrubs (located in the very NW bed along with several other pink/orange flowering cultivars) were planted in 1946 and now each plant stands about 8-10 feet tall.

The R. occindentale is one of two native west coast Rhodies (the other being R. macrophyllum, our state flower) and is found mainly in the mountain and coastal areas of southern Oregon and Northern California.   Because our climate and soils are similar, they are a plant that transfers quite well to our PNW gardens.  They are a slow grower which can take sun or shade and seem to adapt to a variety of soils.  Their native environments range from coastal marshes, river and lake sides and up to mountain meadows.  But that’s not all – the other perk to these shrubs is that they can bear a lovely orange/red fall foliage color.

Come along on one of our Free Weekend Walks and enjoy a guided tour of these and many other collection plants in their full spring glory.   No registration, visitors meet at the Graham Visitors Center at 1:00 pm each Sunday.

For more detail on these shrubs in their natural environment click the article link from Pacific Horticultural Society

Picking the Right Plant and Place

April 17th, 2015 by Sasha McGuire, Education Program Assistant
Which one to get?

Which one to get?

This class is for all those people who go to the nursery or greenhouse, see 50 seemingly identical plants and just throw up their hands. Which one to choose? Aren’t they all the same? Bare root, ball and burlap or container?  And all I need to do at home is just dig a hole and plop it in right?

Or maybe you have purchased plants before, (expensive plants, too!), only to have them mysteriously kick the bucket a year or two later. Find out what could have gone wrong and how to stop it from happening again. (No more wasted $$!)

Emily Bishton will demystify this process. Learn how to pick the best plants from the greenhouse by choosing those with the best root and branch structure, and predicting how they will grow in the future. Once you’ve picked  your perfect plant, find out how to plant, mulch and water it properly. With these tips, your plants will bring you joy and beauty for years to come!

What: Getting Plants Off to a Great Start

Over and under watering are common causes of plant unhappiness

Over and under watering are common causes of plant unhappiness. Chris is watering just right!

Where: UW Botanic Gardens – Center for Urban Horticulture
When: Wednesday, April 22, from 6:30-8pm
Who: Emily Bishton, Green Light Gardening
How much: $15 (Register Online or by phone, 206-685-8033)

Exciting News at Fiddleheads Forest School!

April 13th, 2015 by Kit Harrington

 

 


Listening and responding to the needs of our community is a cornerstone of the Fiddleheads philosophy. Sarah and I were absolutely astounded this year at the outpouring of interest our tiny school received. As word of the Fiddleheads Forest School spread, parents from all over the region took notice of the individualized attention we give to each child, our unique curriculum that thoughtfully integrates the specialized opportunities afforded by the environment to each student, and our remarkable forest grove classroom site where students develop a deep, mindful connection to their environment and to their peers. The result of all this care and consideration is that this year more than 90 families from as far south as Kent and as far north as Edmonds applied to become a part of the Fiddleheads Forest School community. The level of excitement and passion families expressed to us during tours, our open house event, in letters and over the phone had a profound impact on us both, and we knew immediately that we had a responsibility to respond.

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The Fiddleheads Forest School provides a unique experience built upon careful observation and reflection, and is unlike any other existing Forest School model. The level of interest in our program this year shows us that families are responding to the quality of experience Fiddleheads creates, and we want to make sure those families feel they are being heard. After our first year we resisted growth, choosing instead to focus our attention on developing our curriculum, community, and infrastructure. At Fiddleheads, we never want to grow just for the sake of it. We understand the extent to which growth can impact a school, and knew from day one that we would only move forward with expansion if we truly believed it was in the best interest of the children, the families, and the teachers. However, after months of careful consideration and reflection we finally determined that we now capable of expanding the Fiddleheads Forest School in a way that is sustainable while continuing to offer the sort of high-quality education that families have come to expect. These past few weeks have been a whirlwind of meetings intended to determine this growth’s direction, and after thorough deliberation we are finally ready to move forward.

SC_150410_680258Today we are excited to announce that in fall of 2015 Fiddleheads will be expanding to a full second site here at the Washington Park Arboretum! The new site is just across the road from the current classroom area and consists of a grove of native trees and plants adjacent to the arboretum’s Mountain Ash meadow. Just as beautiful but with its own unique features, we feel confident that this new grove is an ideal place to grow our program while still remaining connected as a school. As teachers, we will each attend to a separate site in collaboration with a second qualified lead teacher as well as student interns from the University of Washington and surrounding colleges. The two of us will continue to collaborate in our role as preschool directors to maintain a high level of quality and care throughout the program. While the classes will be distinct, children will regularly come together to engage in group activities coordinated by teachers in both classrooms. This expansion will offer increased opportunities for socialization among the students and collaboration among the teachers. We are deeply thrilled to move forward on this path.

 

This expansion to a second site adds an additional 28 spaces to our roster, meaning that we now have a total of 49 positions for families in our 2, 3, and 5-day programs. This will help us continue to meet demand by allowing us to accept between 18 and 20 new students each year. Over the past week we have begun contacting families already on our waitlist, and we are excited to announce that our second site is already filling up. Because we feel strongly about the developmental importance of maintaining age and gender balance, we are reopening the call for applications to fill a limited number of spots for girls turning 5 years old during the 2015-2016 calendar school year. Families interested in applying for these spots or being added to our current waitlist can fill out an online application. Those families who would like to be added to our 2016-2017 interest list can do so by submitting an email address here. Finally, if you are interested in becoming a part of the Fiddleheads Forest School community we encourage you to follow us on Facebook for up-to-the minute news regarding the school and the arboretum; as well as teacher tips, articles and reflections on the outdoor education movement here in Seattle and beyond. We feel so fortunate that many of you are already a part of the wonderful, supportive community here at the Washington Park Arboretum, and we are looking forward to a fantastic year ahead! Stay tuned for updates and future developments!

SC_150410_680302

Warmly,

Kit and Sarah
Teachers & Preschool Directors
UW Botanic Gardens Fiddleheads Forest School

Core Collection Highlight: Viburnum

April 5th, 2015 by UWBG Horticulturist
Selected cuttings from the Viburnum Collection at the Washington Park Arboretum (3/30/15-4/13/15)

Selected cuttings from the Viburnum Collection at the Washington Park Arboretum (3/30/15 – 4/13/15)

Our Viburnum Collection is recognized as one of the top three national collections. Our taxonomic display currently is home to over 100 different kinds and 330 living specimens.
[Description references: “Viburnums — Shrubs for Every Season” by Michael Dirr.]
Here are a few samples of this diverse and ornamental shrub.

1)  Viburnum carlesii var. bitchiuense        Bitchu Viburnum

  • Wonderfully fragrant flowers in early spring.
  • Closely allied to V. carlesii.  Botanists still debate whether to “split” or “lump”.
  • Located across from the Graham Visitor Center in full flower. Grid: 40-3E

2)  Viburnum macrocephalum       Chinese Snowball Viburnum

  • 6’-10’ rounded shrub.
  • Known for 3″ – 8″ wide, hemispherical cymes, hence the name “Snowball”.
  • Located along maintenance facility mixed-shrub border fence. Grid: 43-5E

3)  Viburnum propinquum

  • Large evergreen shrub with glossy three-veined leaves.
  • Known to be tender in cold Pacific Northwest winters.
  • Located in the Rhododendron Glen parking lot landscape. Grid: 12-8E

4)  Viburnum x rhytidophylloides ‘Alleghany’        Lantanaphyllum Viburnum

  • National Arboretum introduction in 1958.
  • Handsome dense evergreen shrub with abundant inflorescences.
  • Located in Viburnum Collection. Grid: 25-5W

5)  Viburnum utile        Service Viburnum

  • Rare in commerce, but important evergreen species for breeding.
  • Dirr doesn’t think it has much ornamental value. I (David Zuckerman) disagree.
  • Located in Viburnum Collection. Grid: 26-4W

Exploding trees, now showing at your local Arboretum

April 1st, 2015 by Kathleen DeMaria, Arboretum Gardener

March did not go out like a lamb, nor did it end with a whimper. No, this lion ended with a grand BANG!

A lightning strike from the massive thunderstorm that roared through Seattle yesterday was a direct hit on one of our largest trees in the Washington Park Arboretum.

Lighting strike as seen from the Columbia Tower. Photo courtesy of KOMO

Lighting strike as seen from a helicopter and from the Columbia Tower. Photos courtesy of KOMO

 

A Grand Fir located in the Oak grove at the north end of the Arboretum was obliterated with one flash. All that remains of a tree that was easily over 100 feet tall is a jagged snag and a circular field of debris extending at least 150 feet in all directions.

Lightning Strike 3.31.15 002

 

Electricity always takes the path of least resistance, so arborists in places where lightning is common will install tree protection systems. These usually are metal rods affixed to the top of the tree with a metal cable running down the tree to a ground rod buried deep in the soil. This system allows the tree to avoid catastrophic explosions like the one we had yesterday. Lightning is relatively uncommon in the Seattle area, so none of our trees have lightning protection systems.

Lightning Strike 3.31.15 014Lightning Strike 3.31.15 030

 

 

 

 

 

 

 

 

 

 

 

 

 

 

So why did the tree explode instead of just breaking or cracking? Good question. A lightning bolt is hotter than the surface of the sun and has a strong electric current. The current is carried through the tree by the sapwood below the bark. This sapwood is composed of mostly water and when the bolt’s heat and electrical charge hit the tree, the water boils instantly and turns to steam; just like a pressure cooker, except the tree doesn’t have a steam release valve on top. So the result of the excessive heat and  pressure causes the tree to explode. This is not common, but the results are spectacular!

Lightning Strike 3.31.15 025Lightning Strike 3.31.15 001

We will never know why this tree was hit, but we have had a day full of speculation and mitigating safety hazards. Was the lightning attracted to this metal bolt inside the tree from a former cable?

Lightning Strike 3.31.15 020

Was it just a case of being in the wrong place at the wrong time? Was it the high volume of spring sap running? Was it because it was the tallest tree in an open area near water? Was it all of these factors and some unknown? We may never know but we will never forget.

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One odd bonus of this amazing event is that lightning strikes are one of a few (non-synthetic) ways to fix nitrogen in the soil. Along with nitrogen-fixing bacteria and algae, the heat of a lightning flash causes atmospheric nitrogen to combine with oxygen to form nitrogen oxides. These oxides then combine with atmospheric moisture and are then delivered to the soil by rain, where it is transformed by microorganisms into nitrates that can be taken up by plant roots. Fascinating.

We know you never need an excuse to visit the Washington Park Arboretum, but we plan to keep the debris field intact for a few more days so any curious onlookers can come and check out our exploding tree. For your own safety, please stay behind the barriers, and enjoy the show.