95 posts in Horticulture

Jan 10, 2021 / Washington Park Arboretum, Horticulture / UWBG Arborist, Clif Edwards

Winter Interests at the Washington Park Arboretum

Photo of Briar Rose Camellia

1)   Camellia sasanqua ‘Briar Rose’                                          Briar Rose Camellia

This medium-sized, flowering evergreen shrub is native to Japan.  Camellia sasanqua has many cultivars with the most popular being varieties that bloom in winter.
You can currently view ‘Briar Rose’ Camellia in bloom, sitting at the Mary Hughes Foxworth memorial in the Camellia Collection.

2)  Garrya x issaquahensis                                                               Silk Tassel Tree

The Silk Tassel Tree is a medium-sized evergreen bush with an abundant winter floral display of long male catkins that are creamy white-to-light green with pink highlights. 

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Happy Holidays from Your UWBG Horticulture Staff!

Photo of Ilex opaca, American Holly grove

We invite you to enjoy our “Game of Groves”.
Can you name the following iconic tree groves based on the photos shown and hints below?

I am a grove of nine broadleaf evergreen trees with berries that are commonly used as Christmas greens.  My location is an “island” in the middle of the ocean surrounding our five Pacific Rim flora.  

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Nov 12, 2020 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Darrin Hedberg

Selections from the New Zealand Garden at the Washington Park Arboretum

Photo of Mingimingi

1)  Coprosma propinqua                                       Mingimingi

Coprosma is a genus of about 90 species of shrubs and trees found in various Pacific regions, including New Zealand and Australia.  They range from trees to low-growing spreading shrubs and those with a divaricating habit.
A member of the plant family Rubiaceae, C. propinqua is found in swampy areas and near streams throughout New Zealand.  The leaves are very small and oblong and the berries are a translucent blue color. 

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Oct 26, 2020 / UWBG At Home, Horticulture, News / UWBG Horticulturist, Annie Bilotta

The Purples and Reds of Fall from the Home of UWBG Horticulturist, Annie Bilotta

Photo of Forsythia or Easter Tree

1)    Forsythia                                                        Common name:    Forsythia or Easter Tree

A staple of many gardens, it is a harbinger of spring with its early yellow blossoms.  It also provides some very nice fall color, extending its garden interest.
A member of the Olive family, Oleaceae.
Nicknamed the Easter Tree because it blooms around Easter time in early spring.
There are approximately 14 species, mostly from Asia. 

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Oct 11, 2020 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Joanna Long

“Barking up the Right Tree”

Photo of Orange Bark Stewartia

1)  Stewartia monadelpha                                                                  Orange Bark Stewartia

Stewartia monadelpha is a small tree (up to 25 feet high) with stunning cinnamon bark.
A member of the Camellia family, the white flowers resemble those of small, simple Camellias and can be viewed in early summer.
Several beautiful specimens can be viewed at the southern end of the Camellia Collection.

2)   Lagerstroemia indica x fauriei  ‘Muskogee’                             Muskogee Crepe Myrtle


This garden hybrid was developed by the National Arboretum in Washington, D.C. 

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Sep 10, 2020 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Ryan Garrison

Selected Cuttings from the Washington Park Arboretum and the Garden of Virginia L. Morell

Photo of Narrowleaf English Holly

Virginia L. Morell was an avid gardener, president of the American Holly Society, Arboretum Foundation board member, and volunteer at the Washington Park Arboretum.  Virginia and Jean L. Haigh started the Arboretum ‘Saplings’ Program, which they ran for two years.  This program was taken over by UW Botanic Gardens Youth and Family Education and now serves thousands of school children each year. 

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Aug 24, 2020 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Roy Farrow

More Summer Specials at the Washington Park Arboretum

Photo of Rose Glory Bower

1)  Clerodendrum bungei                                                                            Rose Glory Bower

Rose Glory Bower (of the Lamiaceae family) is native to China and northern India.
This shrub spreads aggressively by root suckers and has become invasive in the South.
The rosy-red flowers are very showy and fragrant and attractive to butterflies.
You can find Clerodendrum bungei along Azalea Way below the Winter Garden.

2)   Hydrangea serrata ‘Blue Bird’                                                        Blue Bird Hydrangea

The Blue Bird Hydrangea was an Royal Horticulture Society Award of Merit winner in 1960. 

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Aug 9, 2020 / Washington Park Arboretum, Horticulture, News / UWBG Arborist, Clif Edwards

Summer Specials at the Washington Park Arboretum

Photo of Hardy Fuchsia

1)   Fuchsia magellanica                                                                     Hardy Fuchsia

The stunning display of pink flowers currently on Fuchsia magellanica are enjoyed by hummingbirds and humans.
This widely cultivated small ornamental shrub is native to Argentina and Chile.
You can find this and other Fuchsia sp. blooming in the Pacific Connections Garden.

2)   Lagerstroemia ‘Natchez’                                                         Natchez Crape Myrtle

An attractive small deciduous tree with slender, mottled stems. 

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Jul 9, 2020 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Joanna Long

Australian Inspiration at the Washington Park Arboretum

Photo of Ozothamnus rosmarinifolius 'Silver Jubilee'

1)  Ozothamnus rosmarinifolius    ‘Silver Jubilee’

The silvery foliage serves as a lovely backdrop for the dense clusters of white flowers in spring.
This shrub can grow to about four feet tall and wide and is a member of the Asteraceae family.
You can find Ozothamnus rosmarinifolius ‘Silver Jubilee’ blooming in the Australian portion of the Pacific Connections Garden.

2)   Callistemon pityoides  (Mt. 

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Jun 11, 2020 / Center for Urban Horticulture, Horticulture, News / UWBG Horticulturist, David Zuckerman

Selected Cuttings from the Center for Urban Horticulture

Close-up of Buddleja longiflora (Butterfly Bush)

1)   Buddleja longiflora

This rare evergreen butterfly bush is native to the Serra do Caparao mountains in Brazil.
What makes this Buddleja species unique from other species and cultivars is its stunning, long tubular orange flowers that are paired in three-to-five flowered cymes.
Its flowers, plus striking white tomentose leaves and small stature (four feet), make this a worthy plant to introduce into the nursery trade. 

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