Harbinger of Spring in Seattle – Early flowering cherries on Azalea Way!

March 25th, 2013 by UWBG Horticulturist

bird enjoying cherry flowersMost visitors experiencing the beauty of our historic Azalea Way flowering cherries from now through May probably have no idea of how intensive maintaining their health and prolonging their longevity truly is for the UW Botanic Gardens horticulture staff.   Just ask our Integrated Pest manager, Ryan Garrison. Ryan with staff support spends many a day throughout the year monitoring and controlling the numerous diseases and insect pests our 175 plus cherries are prone to suffer from. Our rainy climate doesn’t help one bit either, especially when dealing with our most notable disease during blossom time;  a fungus known as Cherry Blossom Brown Rot. Yucko!  The good news is any new cherries we plant need to show a reasonable level of resistance. The not so good news is many of our older earlier bloomers, the ones extremely susceptible to the brown rot fungus,  need to be protected with fungicide applications during their bloom period.  As with all of our pest issues, we start with cultural and mechanical control efforts before resorting to chemical controls. The following Integrated Pest management (IPM) program discusses our best management practices for the control of blossom brown rot.  If you are interested in planting cherries for your home garden, I’ve included a list of cherries recommended for our PNW climate, all have good to excellent resistance to blossom brown rot.

Cherry Blossom Brown Rot - causal fungal agent known as Monolinia fructicola. The fungus overwinters on infected twigs and dried fruit on the tree or ground.  The fungal spores are spread in the spring by wind and rain through the blossoms, causing twig dieback.  As part of the UWBG IPM program, moving toward our goal of eliminating the use of all synthetic pesticides is our ultimate goal.

IPM relies on many strategies to manage plant health care. 

  • Proper ID of the pest and its life cycle
  • Regular monitoring of the plants
  • The use of physical, mechanical, cultural, and biological controls
  • Chemical controls used as a last resort*
  • Least toxic chemicals used

* All spray applications are in compliance with WSDA pesticide regulations.  Sign postings are located at all entrances and Graham Visitor Center. Spray applications are scheduled based on timing and weather. We do our best to apply when public are not present. For more information, please contact, David Zuckerman at 206-543-8008 or dzman@uw.edu

The cherries are pruned in early fall  to remove infected twigs and improve air circulation.  Tree rings are given a fresh coat of mulch in the fall to bury any infected plant material that may be on the ground.  In our Cherry Replacement program we are only using cultivars that are resistant to Blossom Brown Rot.

Cherries recommended for the PNW:

    • Prunus ‘Berry Cascade Snow’
    • Prunus ‘Kwanzan’ syn. ‘Sekiyama’
    • Prunus ‘Pink Flair®’
    • Prunus ‘Royal Burgundy’
    • Prunus ‘Shirofugen’
    • Prunus ‘Shirotae’
    • Prunus ‘Snow Goose’
    • Prunus subhirtella var. ascendens
    • Prunus x yedoensis ‘Shidare Yoshino’
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The Red Maples are flowering

March 24th, 2013 by Catherine Nelson, Adult Tours Program Assistant

acer rubrum flowerThe Red or Swamp Maple, Acer rubrum, is always noticed for its intense flame color in the fall, but I love these trees best right now – when they are covered in flowers prior to foliation.

From a distance the light gray bark of the tree sets off the pink & maroon flowers creating a stunning effect – it’s as if the tree is full of red fuzz.  In order to see these gorgeous tiny flowers, you need to find a tree with low hanging branches and get up close; they are only about an 1-1 1/2″ long.

The Acer rubrum is native to North America, East of the Mississippi from the Southern US to Canada.  The tree is monoecious and carries both male and female flowers, but bears them on separate branches.   The flowers with a darker red color are identified as the females. It is a very popular street tree in Seattle, so keep your eyes open while traveling around the city right now, you can’t miss them.

 

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March Color Appears at the Washington Park Arboretum
(Part II)

March 24th, 2013 by Pat Chinn-Sloan

Selected cuttings from the Pacific Connections Garden at the Washington Park Arboretum (March 18 - 31, 2013)

Pacific Connections Garden

1)  Corokia x virgata    ‘Sunsplash’

  • An odd shrub from New Zealand with variegated foliage and wiry, twisty branches.
  • This carefree evergreen tolerates some dry and looks great in containers.
  • Specimens can be found in the New Zealand Entry Garden.

2)  Grevillea victoriae

  • Fine-textured foliage, long thin flower clusters and drought tolerance make these evergreen shrubs very popular.
  • Also known as Royal Grevillea, it is endemic to parts of Victoria in Australia.
  • Several varieties of Grevillea can be found in the Australian Entry Garden.

3)  Gaultheria mucronata   ‘Rubra’ 

  • A hardy evergreen shrub with pinkish-white bell-shaped flowers followed by beautiful red berries late summer through winter.
  • Often referred to as “female prickly heath”, it needs a male plant to ensure fruiting.
  • Beautiful masses of G. mucronata can be found in the Chilean Gateway Garden.

4)  Phyllostachys dulcis

  • Sweet shoot bamboo is considered one of the best edible bamboos.
  • Large drooping leaves, thick culms and a white ring at the node make this a very beautiful bamboo.
  • A lovely drift graces the Chinese Entry Garden.

5)  Ribes sanguineum cv.

  • Flowering current is native to western coastal North America.
  • It and its varieties and cultivars are valued for their brightly-colored spring flowers and bird and habitat support.
  • Enjoy the incredible display of Ribes currently blooming in the Cascadian Entry Garden.
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Fiddleheads Forest School: A Nature Preschool at the UW Botanic Gardens

March 22nd, 2013 by Community Programs Coordinator

In September, the UW Botanic Gardens will open an outdoor, nature-based preschool. The Fiddlehead Forest School is a play-based, exploratory and outdoor program that creates opportunities for children to develop meaningful and caring relationships with one another and the natural world.

GRAND OPENING SEPTEMBER 2013

Fiddleheads Forest School: A Nature Preschool at the UW Botanic Gardens

Take a mSH_fiddleheadphotooment to envision a three year old. This person is probably full of energy and exuding curiosity. Their hands are on everything, tuning into the world with their senses. Their excitement, energy and curiosity are contagious. This small human is developing on a massive scale. They are creating neural connections faster than at any other point in their development. They are learning about the world, and their curiosity knows no bounds. They are also learning about themselves and how to interact with other humans.

Now envision a preschool with those energetic, curious three-year-olds at the UWBG Washington Park Arboretum. Those small, curious hands look for bugs in the leaf litter of our forested areas. Their eyes and ears are fine-tuned by looking and listening for birds in our wetlands, their noses by smelling flowers in our Winter Garden, their taste buds by tasting ripe huckleberries in the Woodland Garden and their imaginations by laying in the grass along Azalea Way looking for cloud shapes.SSHChildleaves

The Fiddleheads Forest School believes in supporting the growth of the whole child through attention to their social and emotional development, self-regulation and physical development.

This is a 10-month preschool with two class options, M/W/F or Tu/Th from 9am-12pm. See the information packet and application on our website.

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Earth Day at the Arboretum

March 21st, 2013 by Community Programs Coordinator

Join Wilderness Awareness School on April 20th from 10am-1pm at the Washington Park Arboretum for a free, fun-filled afternoon of nature connection activities to celebrate Earth Day. Bring yourself, your buddies and the whole family for nature games that will expand your senses and enrich a deeper connection to the earth.

EARTHDAY_2013_A

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Cuba, Una Vez Más

March 21st, 2013 by Sarah Reichard

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The student musicians at the KORIMACAO Project sang several wonderful songs for us. The singer in red on the left was excellent and would be an easy winner for Cuban Idol, if that existed.

[Note: Because last year I blogged about the various legs of our trip and activities, and this year had many of the same events, I am taking a wider view. However, Joan Wells, one of our 2013 trip members, is blogging about her experience. You might want to follow along for Joan’s vibrant descriptions]

At the end of February, another band of intrepid adventurers joined me for my return trip to Cuba. Since my last reflections on the previous trip, I have continued to read about Cuba and 2012 previous travelers have had two reunions and traded numerous emails and articles about this fascinating and confusing country. I was very curious to see what my reactions would be for this trip.

What was the same? We went to many of the same places and heard from many of the same people. Even when there were different people, the impressions were often the same. For instance, I was again impressed with the musical abilities of so many people. Again, we almost always had live music in restaurants and it was common on the streets. Last year we saw a rehearsal by a very talented group of young people at the KORIMACAO Project in Zapata. We did enjoy them again this year, but we also saw a powerful performance in Havana of the Opera de la Calle. This mix of professional and amateur artists has a great musical show that starts out telling the story of Cuba in Spanish, and then somewhat surreally breaks into “Bohemian Rhapsody” by Queen (in English), as shown in this video from a previous performance. Following that song, they moved into a beautiful rendition of “Imagine” by John Lennon. This is always a powerful song, but tears came to my eyes when the Cuban singer looked out into the small, almost entirely American audience and sang:

“Imagine there’s no countries
It isn’t hard to do
Nothing to kill or die for
And no religion too
Imagine all the people
Living life in peace”

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After a fun but soggy hike through the clinging mud of Mil Cumbres, our group attempts to scrap about 50 collective pounds of mud off of our boots.

Indeed. Imagine what these young people’s lives could be. Should be. I never understood that song more than in that minute. Imagine what the last two generations of Cubans could have become and done if U.S. and Cuban politics had not hijacked their options.

 

The beauty of the country is also unchanged. Havana has marvelous colonial architecture in states between ruins to restoration. The countryside is still gorgeous, even though we had some very Seattle-ish rainy weather while we were in the countryside. Everyone’s spirits were up and no one complained, though hiking in red Mil Cumbres mud resulted in impressive accumulations of mud on our boots, leading us to drag our feet like we were wearing 10 lb. ankle weights. I had particularly been looking forward to seeing ethereal Viñales again and sharing it with the group. It was still beautiful, but our desire to explore the town and surrounding areas was…dampened.

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Beautiful Viñales in the sunshine, 2012

 

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Beautiful Viñales in the rainy mist, 2013

What was different? It is a little hard to say, but it seemed like Cubans felt more comfortable with us. I did not sense the anxiety about tips from our group. Yes, they wanted and needed them, but it seemed like they were less concerned that they might not get them. They seemed more giving in talking about the political situation there. Perhaps less concerned about the consequences of being frank with us?

One notable discussion was arranged by our travel partner organization, the Fund for Reconciliation and Development. Our speaker was a retired former diplomat for the Cuban government, with friends obviously in high places. We had a very open discussion about the rights and wrongs of both the Cuban and American governments over the past 50 years and beyond. Last year we danced around the subject of the Cuban Five and Alan Gross, but here we laid out the arguments. I felt emboldened to raise the issue about the lack of free press and access of almost everyone to the Internet (there are no Internet cafes and even at our very nice Havana hotel, the Internet was not available most of the time we were there, and out of the price range for ordinary Cubans). He quickly agreed with me that Cuba will not advance without either and surprised us by saying that since he is retired, he also no longer has access to the Internet! Imagine that – we have smart phones that allow us to access the Internet anywhere, but in Cuba even retired government officials have limited access to it. That we were even having this conversation, however, made me hopeful for their future.

There are still lessons we can learn from them, however. The visit to the Alamar Organoponic Gardens and the National Institute for Research on Tropical Agriculture [note that I am not linking you to the actual institutional websites because they do not have them] was again inspirational. Their practical attitude about food security and food sovereignty may have been born of necessity from The Special Period but it is taking them in a direction we could learn from. And at Las Terrazas, we heard from the Director of the field station that they have 30 years of data about the phenology (timing of plant flowering, leaf growth, etc.) that gives them a good record for tracking climate change. Not many places here have that.

On this trip we also had a wonderful time bird-watching. Bee hummingbird? Cuban tody? Pygmy owl? Sí!  More about that next…

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What’s Going on Around the Burnt Tree?

March 12th, 2013 by UWBG Communication Staff

By Andrew Fraser

Preparing the area to be planted with native grasses and flowers near Shoveler's Pond

Preparing the area to be planted with native grasses and flowers near Shoveler’s Pond

If you have walked around Shoveler’s Pond in the Union Bay Natural Area (Montlake Fill) this month you have seen the area undergoing a flurry of activity from plowing to bulldozers moving dirt. This is all part of the ESRM 473 restoration project. Each winter quarter, students in the class design and implement a restoration project in the Union Bay Natural Area. Previous year projects have included mound construction and prairie plant installation around Shoveler’s Pond, trimming the willows and clearing up the area around the large central pond, wetland construction and prairie conversion of the E5 parking lot.

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Planting native grasses near Shoveler’s Pond.

This year is the first of a multi-year process of converting the non-native grassland of UBNA into that of the local South Puget Sound Prairies and Gary Oak Savannas. Students have selected, propagated and purchased a large quantity of plants and seeds of  native flora and have begun installing them this week. The goal of these projects is to help our native flora to get a leg up over the large number of non-native plants in the area and provide an easy view location of some of the beautiful local native grasses and wildflowers. Within the next two years, this year’s project site will change from an open gravel and sand patch to a prairie landscape covered with native grasses such as Idaho Fescue, Blue Wildrye, and Tufted Hairgrass with wildflowers such as Common Camas, White Fawn lily, Chocolate lilies, Prairie lupine, Scarlet Paint Brush, and Broad-leafed Shooting Start blooming in the area from Early Spring to Early Summer.

Please forgive our mess and come see the next stage of UBNA’s transformation from the Montlake Dump to a premier Seattle natural area.

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Building the New Zealand Focal Forest, Pacific Connections Update

March 11th, 2013 by UWBG Horticulturist

The 2.5 acre New Zealand focal forest construction project is scheduled to be completed by the end of June.  W.S. Contractors LLC  is currently finishing up infrastructure details, including the future bus turnaround and toilet area located across Arboretum Drive from the NZ focal forest in the future Australia exhibit. Irrigation system installation will begin later this month through May. Planting will begin in June. There will be approximately 10,000 total plants representing over 90 taxa for the 9 plant communities that will be represented.  Garden dedications have been tentatively set for September 13 and 14.

In tandem with the 2.5 acre NZ focal forest project, the Lake Washington Blvd street lighting upgrade through WPA is completed. The Olmsted inspired lamps installed with modern LED bulbs is a huge aesthetic and vehicular safety improvement.   Also, the lower section of the Chilean Gateway re-do will be wrapping up with new plantings in the coming weeks. Our goal for the lower Chilean Gateway is to make it uninviting for pedestrians to walk curbside and trample our plants. We accomplished this by creating raised “fingers” and small berms close to the curb by adding over 120 yards of soil amendment. The well-draining soil-mix will also provide much better growing conditions for the Chilean blue wheatgrass, Elymus megellanicus, than before.

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Stock your library: Shop at the Garden Lovers’ Book Sale

March 11th, 2013 by Tech Librarian, Tracy Mehlin

What could be better than a garden full of beautiful plants? A home library full of books about plants!

The 8th annual Garden Lovers’ Book Sale is the best source of used books on plants, horticulture, garden design, edibles, pest control, and special this year only: cooking!

Dahlia photo by Brian ThompsonThe fun begins on Friday, April 5th at 5 pm at the Wine & Cheese Preview Party. Tickets cost $20 and include light refreshments plus first crack at the books. Purchase in advance by calling 206-543-0415.

On Saturday the doors open at 9:00 am. The public sale is free. Bring your own bags or boxes to load up on great deals.

Sale is at the Elisabeth C. Miller Library at the Center for Urban Horticulture, 3501 NE 41st St, Seattle, WA 98105.

  • Preview party: April 5, 5-8pm, $20.00
  • Public sale: April 6, 9am-3pm, free.
  • All proceeds benefit the new materials budget for the Miller Library.
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March Color Appears at the Washington Park Arboretum

March 10th, 2013 by Pat Chinn-Sloan

Selected cuttings from the Washington Park Arboretum (from March 4 - 17, 2013)

1)  Camellia japonica  ‘High Hat’

  • One of our earlier-flowering Japanese camellias.
  • This specimen can be found along the west side of Arboretum Drive near the construction zone detour.

2)  Pieris japonica  ‘Valentine’s Day’

  • Showing its large panicles of pink flowers.
  • Can be found on Azalea Way just south of the Lilacs.

3)  Rhododendron floribundum

  • Native to the Szechwan Province of China.
  • Specimen currently resides along the Upper Trail near the Rhododendron seedling area.

4)  Salix irrorata

  • Upright shrub with slender purple shoots and gray catkins borne before the leaves.
  • Can be found in the Witt Winter Garden.

5)  Stachyurus himalaicus

  • Native to western China and Taiwan.
  • Spreading, deciduous shrub with arching shoots and bell-shaped flowers borne in racemes in late winter.
  • Can be found on the west side of Arboretum Drive across from the double lot.
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