Clethra barbinervis 'Takaeda Nishiki'

Clethra barbinervis ‘Takaeda Nishiki’

Variegated form of Japanese summer sweet with amazing white splashed foliage and masses of powerfully fragrant white flowers all summer. To 10′ tall moderately fast in part shade to full sun in rich, moisture retentive soil. Regular summer water. In time it forms a trunk that displays mottled exfoliating bark which is very pretty. . Wonderful woodland tree that endures full sun with regular irrigation. Light yellow fall color. Graceful at all times. Nice branching pattern in symmetrical whorls. The clusters of flowers dry and cling to the tree in winter. These can be removed by the fastidious gardener or left to hang and decompose with the effect of spanish moss.  Blooms continuously most of the summer. The clusters of pendant white flowers emit an intoxicating perfume that is most notable on warm to hot days. It will perfume the entire garden- its not a cloying sweetness either but a much more sophisticated aroma that has you seeking more. Water regularly, not drought adapted. Lovely, lovely specimen tree. Avoid hot dry sites.

My Favorites

Plant type:  |  Sun exposure: , ,
Biome: ,  |  USDA Hardiness zone: Zn5a -15º to -20ºF
Foliage color:  |  Foliage season:


This treasured evergreen to semi evergreen asian dogwood is a wonderful tree for a protected location. New growth is copper colored and retains this hue for quite some time . To 26′ with a strongly pyramidal habit. In early summer true flowers with erupting chartreuse then light yellow very showy bracts.  These are followed by red edible berries that appeal to some and a lot to birds. The bloom period is exceptionally long for a dogwood and it blooms con currently with Korean Dogwood (Cornus kousa) to which it is closely related. Mostly evergreen expect leaves to drop below about 20ºF twig damage does not occur until 10ºF. Definitely site well out of subfreezing east wind. A south or western exposure. Very regal and elegant tree The more protected the location the more evergreen.  This fast growing tree would make an elegant espalier – flowers appear on wood from the previous season. Light, consistent irrigation in average to enriched soil. Himalayan dogwood. Thrives at the cool Oregon coast . Avoid  hot and dry locations..

My Favorites

Plant type:  |  Sun exposure: ,
Biome: , ,  |  USDA Hardiness zone: Zn7b 10º to 5ºF
Foliage color: ,  |  Foliage season:


Cornus nuttallii

Pacific Dogwood is one of our most beloved native flowering trees. From BC south to the Sierra  Nevada of California this understory to margin tree alights in April and May in pristine white bracts/ true flowers appear. They perch on upward arching stems for a perfect display. This large conical shaped tree can achieve 35′ in great age. Water deeply and infrequently during its first summer in the ground, once it is firmly established it can go with natural rainfall. In full hot sun more irrigation may be needed. Native to the Portland city limits and a firm spring decoration on our freeways. Pacific dogwood contrasts wonderfully in bloom with deep green conifers. Average growth when young is 2′-3′ per year. In certain seedlings this spectacular species may re-bloom in August/September.  Its a fairly small percentage but when it occurs its a refreshing display at the end of hot summer. Fall color is pink/red/orange and is conspicuous in the understory. Full sun to overhead  shade in the understory. In autumn red fruits decorate the branch tips and are food for birds. Give this native tree good air circulation and mulch after planting. Oregon native plant.

My Favorites

Plant type:  |  Sun exposure: , ,
Biome: , , ,  |  USDA Hardiness zone: Zn5a -15º to -20ºF
Foliage color:  |  Foliage season:


Cotinus obovatus

Cotinus obovatus

American smoke tree has a surprisingly limited natural range in Arkansas, Missouri, Oklahoma but its an exceedingly adaptable tree. Large round leaves are soft green when they emerge. In mid summer the tips of the branches are covered in clouds of beige smoke- which is not as prolific as the hybrids or the species Cotinus coggygria. Rounded medium sized tree to 22′ tall and handsome. Moderately slow growing 1-2′ per year when young. Full sun and regular irrigation to established then fully summer drought established. Deep rich soils yield the best performance. Autumn is its time of true glory. The large soft leaves transform into electric shades of orange/red/yellow. It holds this color for weeks before dropping. An amazing show that outshines just about any other deciduous tree. Limited supply. Accepts some summer irrigation. It is being used as a street tree in Portland, where its arboreal habit is superior to Cotinus coggygria and its hybrids.

My Favorites

Plant type:  |  Sun exposure:
Biome: ,  |  USDA Hardiness zone: Zn4a -25º to -30ºF
Foliage color:  |  Foliage season:


Crinodendron patagua

Crinodendron patagua

Chilean Lily of the Valley Tree or Evergreen Snowbell- both descriptive common names for this unusual tree from South America. Fast growing evergreen tree that looks superficially like a live oak. In mid to late summer relatively large pure white waxy bells appear and line the stems like small bells. The bottom of the waxy bloom is deeply serrated. Cool. To 16′ tall and half as wide. Often forms multi-trunks if you don’t want this then diligently prune it until you get one sturdy trunk. Do not site in the direct path of subfreezing east wind- a south or west exposure will do in windy areas. Easy to grow tree that gets by with a minimum of water in summer once established.

My Favorites

Plant type:  |  Sun exposure:
Biome: , ,  |  USDA Hardiness zone: Zn7b 10º to 5ºF
Foliage color:  |  Foliage season:


Cupressus (Hesperocypress) macrocarpa 'Citriodora'

Cupressus (Hesperocypress) macrocarpa ‘Citriodora’

Fantastic form of the incredibly tough Monterey Cypress. Foliage on this fast growing large evergreen tree is brilliantly hued in chartreuse/gold and acid green. Pinch the foliage and the fragrance of lemons is released. Fast growing tree for poor to average well drained soil. Avoid overly rich soils- which causes rank, unsteady growth. Average un-amended native soils are best. Light summer water to initiate growth and then completely drought tolerant. To 35′ tall x 25′ wide in 15 years. In time it develops a really cool flat spreading crown that this species is so famous for. Great drought and cold tolerance at our nursery. Give it amble room, full all day sun and not much else. Cold hardy to 0ºF. Long lived tree. This species has been placed in the genus Hesperocypress.

My Favorites

Plant type:  |  Sun exposure:
Biome: , , , ,  |  USDA Hardiness zone: Zn7a 5º to 0ºF
Foliage color:  |  Foliage season:


Cupressus glabra 'Sulphurea'

Cupressus glabra ‘Sulphurea’

Remarkable form of the hardy Arizona Cypress. This variety has foliage frosted in chartreuse/cream with interior foliage closer to sea green. A great affect. To 15′ tall but only 4′ wide this is a decidedly fastigiate form of this species. Fast growing tree for screens, specimen. Poor to average soil- avoid rich soil- this causes Cypress to grow to fat and fast in our climate- they get rank and rocky. So plant in average to poor soil with light irrigation until you see appreciable new growth and then none- ever. This produces a more measured growth rate and a sturdier plant. Full sun- from ALL directions- no shade at all. Open exposed sites are best. Very pretty plant that adores our climate. Cold hardy below 0ºF. Rare tree and quantities are limited. Completely drought tolerant.

My Favorites

Plant type:  |  Sun exposure:
Biome: , ,  |  USDA Hardiness zone: Zn6a -5º to -10ºF
Foliage color:  |  Foliage season:


Cupressus sempervirens 'Glauca'

Cupressus sempervirens ‘Glauca’

The most common form of Italian Cypress with a strongly fastigiate (skinny upright habit) and blue green foliage. Fast growing tree that demands average to poor soil and little to no summer moisture. Soil that is too rich and too much water in our climate leads to prodigious rank growth and instability. Dry, poor soils and no summer water leads to steady measured growth and no tipping. Full all day sun from every direction. This will ensure thick foliage from the base to the top. Established plants can easily put on 3′-5′ of growth per year. To 22′ tall and about 18″ wide. Extremely drought tolerant. Does not succumb to spider mites or other diseases as Arborvitae frequently can.  If it is too tall you may top it and it will re-grow a new terminal leader quickly. Great in containers. Protect containers from temperatures below 10ºF. Takes intense reflected heat with no problem. Great urban tree.

 

My Favorites

Plant type:  |  Sun exposure:
Biome: ,  |  USDA Hardiness zone: Zn7a 5º to 0ºF
Foliage color:  |  Foliage season:


Cupressus sempervirens 'Swane's Golden'

Cupressus sempervirens ‘Swane’s Golden’

The golden form of Italian Cypress which is a very useful plant for bright vertical effects in gardens. Fast growing fastigiate tree to 18′ tall and just 18″ wide. Full sun and average to poor soil with little to no summer water. If it becomes disheveled in ice or snow simply give it a good hair cut and a denser form will emerge. You may also cut the top to limit size and a new vertical leader will quickly form. Deer resistant. Avoid overly enriched soil and shade or growth will be rank and unkempt. Grows about 2′-3′ in an average year.

My Favorites

Plant type:  |  Sun exposure:
Biome: , ,  |  USDA Hardiness zone: Zn7a 5º to 0ºF
Foliage color:  |  Foliage season:


Cupressus sempervirens 'Totem'

Cupressus sempervirens ‘Totem’

A superior form of Italian Cypress that is thinner and more resistant to ice and snow. The foliage is forest green eschewing the blue hue of the more common ‘Glauca’. To just 10″ wide it rises to 16′ tall in a fast growing spire. Full sun (which means all parts of the columnar tree from top to bottom should receive full sunlight) and poor to average, unimproved soil. Avoid overly enriched soil which causes fast rank growth which can make the tree unsteady. Its adapted to the very poorest soils which ensure measured, sturdy growth. Our favorite form of this useful disease and pest resistant columnar tree. Cold hardy.

My Favorites

Plant type:  |  Sun exposure:
Biome: , ,  |  USDA Hardiness zone: Zn7a 5º to 0ºF
Foliage color: ,  |  Foliage season: