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.

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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.

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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.

 

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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.

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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.

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Dendropanax trifidus

Dendropanax trifidus

Underused cold hardy evergreen tree that has fascinating and handsome foliage and tolerates full sun to total shade as well as summer drought. Umbrella shaped tree with glossy large triple lobed leaves that become entire on adult foliage. Slow growing to 17′ tall and half as wide. Attractive pale tan bark. Very tough and adaptable small tree. Green flowers in summer become black berries by autumn but are almost always stripped by birds. Great branching structure and form in time. Very cold hardy and deer resistant.

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Embothrium coccineum

Embothrium coccineum

Chilean Fire tree is a  brilliant and fun tree to grow in the milder parts of the PNW. Our seed strain is from established cold hardy specimens around Portland.  Moderately fast growing somewhat thin tree to 18′ tall and just 6′ wide in 10 years. In late spring (May) the tree is smothered in fascinating tubular hot orange/red flowers that are effective for a month or more. Semi-deciduous to deciduous in these hardy forms. Full sun and average well drained soil that has NOT been amended. Protea family it is sensitive to high nutrients- best in our native unimproved conditions. Light summer water. Hummingbirds manna. Long grown in the PNW- because it adores our maritime climate. Fantastic performance at the Oregon coast. Less susceptible to overly enriched soil. Mulch after planting. Fall color is very late Nov/Dec and is red glowing orange. Very important to water this tree until you see progressive new growth. It can be somewhat difficult to establish. Avoid disturbing the roots and mulch lightly with bark. In subsequent years water once every 2 weeks in summer is sufficient. Blooms on wood from the previous year. Prune AFTER flowering if needed. Full sun, from every direction.

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Eriobotrya japonica

Eriobotrya japonica

Loquat is much hardier than most people think. Enormous specimens are ancient and scattered around Portland. In my previous garden I had a huge specimen that sailed through the worst winters (below 10ºF) and epic ice and snow with NO damage. Bold, broadleaved evergreen tree. The leaves are huge and look very tropical. In winter buds clad in brown fur support many very fragrant white flowers. Loved by overwintering Anna’s Hummingbirds. If the winter fizzles out and temperature fail to drop below 20ºF you may see the small, sweet fruits ripen in summer to early autumn. Primarily it is grown for its great foliage and convenient size. To 18′ tall and 10′ wide forming a rounded crown in 10 years. Full sun and rich to average soil. Completely drought adapted but summer water will increase the growth rate. Hardy to 5ºF and does not suffer foliage damage until that point is reached. Avoid growing this tree in the windy eastern exposed suburbs of Portland. Excellent tree for a small garden. Japan.

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Eucalyptus archeri

Alpine Cider Gum from high elevations in Tasmania has proven to be one of the reliable species of Eucalyptus for our region. Juvenile (young) growth is perfoliate and very very light gray blue- this is the foliage used as popular cut material. The tree may be cut back nearly to the ground regularly to retain this foliage- The tree must be established at least a year before you do this. Otherwise the adult foliage is totally different. Bright green and elongated leaves with a round tip hang densely on an upright growing nice looking tree. Eventually, the bark becomes amazing with pink and gray striations. Blooms in early spring with white flowers. Extremely fast growing tree to 35′ tall + that is a great evergreen garden tree. Good looking year round. Handles ice and snow like a champ- shedding snow and bending under ice without breaking. Full sun and rich to average soil with regular summer water through the first year. High deer resistance. Hardier to cold with age.

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Eucalyptus dalrympleana

Eucalyptus dalrympleana

Mountain white gum or just Mountain gum is a wonderful cold hardy Eucalypt that can achieve the largest proportions of any that we grow. In Portland specimens of 60′ occur and it presents as a large spreading tree with sickle shaped leaves of deep green and glossy. Very aromatic when crushed and excellent material for wreaths. In time it develops fantastic powder white bark.  Fast growing in youth to 6′ a year in rich soil with regular irrigation. Once established it is very drought tolerant. In time it forms a large spreading crown on a majestic and easy to grow tree. Requires a large site. Eucalyptus are intolerant of all shade and should be hit from all sides by sunlight. Otherwise they will grow sparsely and lean towards the sun. White flowers occur in late winter and are more curious than showy. Does have some leaf drop- take note near patios. Cold hardy to 5ºF when established. Gains cold hardiness with age. Moderately deer resistant.

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