65 posts in Horticulture

Many Forms of Japanese Maples Seen at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, April 22, 2019 - May 12, 2019

1)   Acer palmatum ‘Beni otake’                          “Big Red Bamboo”

This linearilobum type of Japanese maple has long, strap-like lobes to its leaves and an upright-layered form.
Fall color of this maple is deep crimson and can be seen next to parking lot 11 in the Woodland Garden.

2)   Acer palmatum ’Shigitatsu sawa’        “Snipes, quacking, flying up from a swamp”

This variegated Japanese maple of the Amoenum type has a pale yellow blade, divided by deep green veins with a pale pinkish blush at the lobe tips. 

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Spring Highlights at the Washington Park Arboretum

Selected cuttings at the Washington Park Arboretum, April 8 - 21, 2019

1)   Amelanchier X spicata                          Serviceberry

This shrubby, multi-stemmed tree, native to United States and Canada, has an impressive spring display of white flowers.
We have lost a couple of our Amelanchier due to past winters; the remaining collections reside south of the Centennial Garden on Azalea Way.
Amelanchier are being planted more frequently in the urban environment for beauty and the value for wildlife. 

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“Curtain” Shrubs for the Spring Garden

Selected cuttings from the Washington Park Arboretum, March 25 - April 7, 2019

1)   Corylus maxima  ‘Atropurpurea Superba’                          Purple Leaf Filbert

This very large growing European filbert shrub is festooned with catkins before the purple leaves form, giving an impression of a pendulous curtain of 3-inch mauve spikes.
Its size can be controlled by thinning out the oldest stems in spring.
This cutting is from a mature specimen located at the service entrance to the Broadmoor Golf Course. 

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Selections from the Camellia Collection at the Washington Park Arboretum

Selections from the Camellia Collection at the Washington Park Arboretum, March 11 - 24, 2019

1)   Camellia japonica  ‘Willmeta’

This light pink Camellia is reminiscent of an apple blossom.
Will and Meta Jensen brought this cultivar with them as a seedling from Holland and the specific epithet is a combination of their first names.

2)   Camellia japonica  ‘Amabilis’

This white Camellia has impressively large single blossoms.
‘Amabilis’ is a French cultivar originating in Nantes in the 1820s. 

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It’s Snow Big Deal!

Selected cuttings from the Washington Park Arboretum, February 25, 2019 - March 10, 2019

Here’s a sampling of some of the Arboretum trees that sustained some damage from the recent snow. Luckily most of the cuttings were taking from plants that will survive!

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50 Year Snow Storm Hits Arboretum Plant Collections Hard!

The record cold temperatures and snow that fell in Washington Park Arboretum between Feb 3 and Feb 11 will be one for the record books when it comes to accounting for all the plant collections damage and total losses.

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Early Flowering Rhododendrons at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, January 21, 2019 - February 3, 2019

1)  Rhododendron arboretum hybrid

This Rhododendron, located in the Joseph A. Witt Winter Garden, dutifully produces its blooms of bright rose in the dark of winter.
The UW Botanic Gardens’ database has records of it blooming in December, January, and February.

2)  Rhododendron floribundum

Native to the southern central area of China, and was first described by Adrien René Franchet.
Franchet was a French botanist who was noted for his extensive work describing the flora of China and Japan, based on the collections made by French Catholic missionaries in China – Armand David, Pierre Jean Marie Delavay, Paul Guillaume Farges, Jean-André Soulié, and others. 

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Jan 24, 2019 / Center for Urban Horticulture, Students, Union Bay Natural Area, Horticulture, News / Jon Backus, Union Bay Natural Area Research Assistant

Volunteers Give Back on MLK Day of Service 2019 at the Union Bay Natural Area

Volunteers helping out in the Union Bay Natural Area, 2019 MLK Day of Service

“The time is always right to do what is right.” – Martin Luther King Jr.
While championing civil rights, Martin Luther King Jr. was also a strong advocate for environmental justice. In honor of MLK Day of Service 2019, over 30 dedicated volunteers came ready to work to help restore valuable habitat for wildlife in the Union Bay Natural Area (UBNA) at the Center for Urban Horticulture. 

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Selected Cuttings from the Witt Winter Garden at the Washington Park Arboretum

Selected cuttings from the Witt Winter Garden at the Washington Park Arboretum (December 31, 2018 - January 13, 2019)

1)   Chimonanthus praecox                          Wintersweet

The light yellow flowers are debatably the sweetest of the Witt Winter Garden.
Wintersweet is highly cultivated in China where the flowers are used in teas and herbal remedies despite the fact that the seeds are poisonous.
Also in China, the flower petals are used in potpourri and to scent linen.

2)   Cornus sanguinea ‘Midwinter Fire’                          Midwinter Fire Dogwood

Cornus sanguinea is native to Europe. 

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Winter Interest at the Washington Park Arboretum

1)  Camellia sasanqua                          Sasanqua Camellia

This glossy evergreen shrub with attractive flowers is native to China and Japan.
There are many cultivated varieties of this species with the first ones being recorded from Japan around 1700. Over 15 varieties reside in our Camellia Collections.
The plant was valuable to early Japan as the leaves were used for tea and the seeds used to make tea seed oil. 

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