Seasonal Highlights

January: Heather, hellebore, holly, mahonia, sarcococca, witch hazel, the Winter Garden.
February: Daphne, dogwood, chimonanthus, heather, hellebore, holly, rhododendron, sarcococca, witch hazel, the Winter Garden.
March: Camellia, flowering cherry, corylopsis, daphne, forsythia, heather, hellebore, magnolia, rhododendron, witch hazel.
April: Azalea Way, barberry, camellia, flowering cherry, halesia, maple, madrona, magnolia, rhododendron, serviceberry.
May: Crab apple, dogwood, magnolia, mountain ash, rhododendron, red bud,serviceberry.
June: Rock roses, brooms, Korean dogwood, rhododendrons, stewartia, styrax.
July: Stewartia, eucryphia, hydrangeas, maackias. Tree Tour trail map
August: Eucryphias, hydrangea, sorrel trees, crabapples(fruit). Tree Tour trail map
September: Franklinia, Japanese maples, sorrel trees. Tree Tour trail map
October: Fall Colors: Japanese maples, witch hazels, sourgums, sorrel trees, buckeyes, strawberry trees, mountain ash. Tree tour trail map
November: Hollies, callicarpa, mountain ash, viburnum. Tree tour trail map
December: Sarcococca, hollies, the Winter Garden.

1) Rhododendron luteum

Also called Yellow Azalea or Honeysuckle Azalea.
Despite the sweet perfume, the nectar is toxic. Records of people poisoned by eating the honey date back to 4^th century B.C.
Cultivated both as an ornamental and as root stock.

2) Laburnocytisus adamii

Also known as Adam’s laburnum or broom laburnum.
Considered a horticultural curiosity, some branches produce yellow flowers while other branches produce coppery-pink flowers.
Located along Arboretum Drive south just south of the Sassafras.

3) Paeonia Lutea var. Ludlowii

A rare Chinese form of tree peony.
Large saucer-shaped blooms appear in late spring in a beautiful clear yellow color.
Avoid pruning except to remove large branches.
Located along Arboretum Drive across from the Sequoias.

4) Petteria ramemtacea

Fragrant yellow flowers in early summer and tri-foliate leaves make this unusual plant resemble a shrubby golden chain tree.
Native to Yugoslavia and Albania.
This specimen is located along the east side of Arboretum Drive behind the Dove Tree.

5) Sophora microphylla

1) Azara lanceolata

An evergreen shrub with arching branches and lance-shaped leaves, A. lanceolata bears clustered yellow flowers in mid to late spring. Native to South America, Azaras is a genus of 10 species within the family, Flacourtiaceae.
Located in the double lot on the east side of Arboretum Drive.

2) Cercis siliquastrum (Judas-tree)

A deciduous tree usually of low, bushy habit, C. siliquastrum forms magenta-colored flower clusters before and with the leaves, and often on the main branches.
The popular name of Judas-tree is derived from the legend that this was the tree upon which Judas hanged himself after the great Betrayal.
Located along Arboretum Drive near the Rock Roses.

3) Citrus trifoliata

Native to Northern China and Korea, C. trifoliata is a deciduous shrub armed with sharp spines along rigid green shoots. Solitary, fragrant white flowers are borne in late spring, and often again in autumn.
Located west of Azalea Way near the Boyer parking lot.

4) Fothergilla major

Erect terminal spikes of fragrant white flowers give this upright shrub a charming quality during the spring season.
Native to the Allegheny Mountains, from Virginia to South Carolina.
This specimen is located near the ongoing Pacific Connections Gardens Project, east of Arboretum Drive.

5) Malus ‘Makamik’
As with many of our flowering crabapples, M. ‘Makamik’ is currently showing off its clustered pink to purple blossoms.

University of Washington Botanic Gardens