49 posts in Horticulture

New Arbor Installed in the Seattle Garden Club Fragrance Garden

On June 7, a new centerpiece was installed to enhance the Seattle Garden Club Fragrance Garden at the Center for Urban Horticulture. This beautiful arbor, designed by Tim Sharp of Iron Design Center NW, was a gift from the Seattle Garden Club, who has supported the Fragrance Garden both financially and with volunteer garden care since its installation in 2007. The Garden was extensively renovated and enhanced in 2015, and the arbor completes the design elements envisioned at that time. 

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Summer Flower Subtlety at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, June 18, 2018 - July 1, 2018

1)  Illicium henryi                    Henry Anise Tree

This attractive evergreen shrub is native to China.
It has star-shaped flowers in pink to deep crimson, anise-scented leaves when bruised and is tolerant of shade.
This specimen is located adjacent to the Lookout Loop Trail in the Asiatic Maple collection. Grid 25-1E, if using our mobile interactive plant map.

2)  Leptospermum scoparium                    Manuka

A broad-leafed evergreen shrub native to New South Wales, Victoria, Tasmania, New Zealand. 

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Selected Cuttings from the Washington Park Arboretum for June 2018

Selected cuttings from the Washington Park Arboretum, June 4 - 17, 2018

1)  Kalmia latifolia                     Mountain Laurel

This attractive evergreen shrub is native to the eastern United States.
Has five-sided cup-shaped clusters of pink flowers.
The name honors Pehr Kalm (1715-1779) and latifoliia means “Broad Leafed”.

2)  Rhododendron occidentale                     Western Azalea

This deciduous shrub is native to the coasts of central and southern Oregon and California.
Fragrant, funnel-shaped flowers are borne in trusses and vary from white to pale rose, with or without a yellow blotch and sometimes streaked with darker rose markings. 

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Selected Cuttings from the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, May 21, 2018 - June 3, 2018

1)  Enkianthus campanulatus                    Redvein Enkianthus

This attractive deciduous shrub is native to open woodlands in Japan.
Tiny bell-shaped, creamy-yellow to reddish flowers held together in clusters.
Small elliptic leaves turning bright red, orange and yellow in the fall.

2)  Davidia involucrata                     Handkerchief Tree

This deciduous tree is native to woodlands in central China.
Its small, reddish purple flower heads are surrounded by a pair of large, white bracts up to 30 cm. 

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Selected cuttings make their appearance in late March at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, March 19, 2018 - April 1, 2018

1)  Berberis darwinii                     Darwin’s Barberry

This barberry was discovered in Chile by Charles Darwin in 1835 during his voyage on the Beagle.
Located in the Chilean entry garden of the Pacific Connections Garden, the red-tinted flower buds open to bright yellow-orange flowers.
The abundant summer fruit of this barberry is sweet and delicious as opposed to our native sour barberries (mahonias). 

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First to Flower in March

Selected cuttings from the Washington Park Arboretum, Marcy 5 - 18, 2018

1)  Forsythia ovata     Korean Forsythia

This genus is named in honor of Scottish botanist William Forsyth. Forsyth was a founding member of the Royal Horticulture Society in England.
A short and spreading deciduous shrub that is popular in gardens and yards for its early spring display of bright yellow flowers.
These are planted throughout the park, but can be enjoyed walking down Azalea Way. 

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Requiem for Two Oaks and a Southern Beech

Selected cuttings from three significant tree collections in the Washington Park Arboretum, February 19, 2018 - March 5, 2018

“So if you’re travelin’ in the north country fair
Where the winds hit heavy on the borderline
Remember me to one who lives there
She once was a true love of mine.”
– Bob Dylan
Three significant tree collections succumbed to frigid north winds this past weekend.  These cuttings pay homage to their past lives.
1)   Nothofagus pumilio                Lenga Beech in Mapuche language      (Grid 49-2E)

This Chilean deciduous tree from the Andes (accession 637-70*A) was received as a whole plant from Edinburgh Royal Botanic Garden in 1970. 

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Colorful Willows and Dogwoods for Winter

Selected cuttings from the Washington Park Arboretum, February 5 - 18, 2018

1)  Salix  ‘Swizzlestick’                   Corkscrew Willow

Thrives in wet locations and is salt tolerant.
Orange-yellow young twigs that have a corkscrew growth pattern
Cut back hard in spring to promote attractive new branches.

2)  Cornus sericea  ‘Flaviramea’ Yellow Twig Dogwood

Medium to large, deciduous shrub
Bright yellow-green young twigs easily grown in medium-to-wet soils in full sun or part shade.
Species native to North America (excluding lower mid-west and deep south)

3)  Salix alba  ‘Britzensis’             Coral Bark Willow

Fast growing to 80 feet tall, but may be coppiced each spring. 

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Color in Winter at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, January 22 - February 1, 2018

1)   Sarcococca hookeriana var. digyna                     Sweet Box

Evergreen, rhizomatous, suckering shrub
Purplish stems with narrowly lanceolate, mid-green leaves and clusters of small, creamy-white, fragrant flowers
Native to western China

2)   Hamamelis mollis                      Chinese Witch Hazel

Medium-to-large, deciduous shrub
Fragrant yellow flowers often with a red base, with four ribbon-shaped petals that grow in clusters
Native to central and eastern China

3)   Daphne bholua  ‘Jacqueline Postill’                     Bhulu Swa, Nepalese Paper plant

Evergreen shrub
Leathery leaves and deep pink flowers with a powerful fragrance
Native to the Himalayas and neighboring mountain ranges from Nepal to southern China

4)   Garrya elliptica  ‘James Roof’                    Silk Tassel

Evergreen shrub to small tree
Yellowish-colored, male catkins that dangle 12″ or more from the ends of the branches in winter to early spring and turn gray as they age. 

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Fine Fall Food for Our Feathered and Feelered Friends

Selected cuttings from the Washington Park Arboretum, (November 20, 2017 - December 4, 2017)

1)   Arbutus unedo           Strawberry Tree

Arbutus unedo specimens can be found surrounding the courtyard on the south side of the Graham Visitors Center.
As the fruit requires 12 months to ripen, both flowers and ripe fruit are present in the fall for an excellent display as well as food for both pollinators and other wildlife.
Varied thrush visit our courtyard in the winter to take advantage of the dense cover and fruit. 

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