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Quercus × warei REGAL PRINCE

Quercus × warei REGAL PRINCE

REGAL PRINCE® Fastigiate oak, REGAL PRINCE® Cypress oak, REGAL PRINCE® Columnar Oak

synonym Quercus x warei 'Long'

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Description

Quercus × warei REGAL PRINCE is a relatively new cultivar among columnar oaks. It is a hybrid between Quercus bicolor and Quercus robur ‘Fastigiata’ and is a sibling seedling from the same cross that produced Quercus × warei ‘Nadler’ (KINDRED SPIRIT). The original tree was found, selected and patented in 1997 by nurseryman Earl Cully on the Columbia campus of the University of Missouri in the United States. As a young tree, it grows narrowly columnar with a strong fastigiate habit and develops a stronger and fuller branching structure than many other columnar oaks. With age, the crown becomes broader and more open and eventually forms a narrow oval shape, reaching about fourteen meters in height and five to six meters in width.

The large, inversely ovate and lobed leaves are very attractive and healthy, with good resistance to powdery mildew. Because the branches grow upward at an angle, the underside of the bicolored leaves becomes especially visible. The felted, silvery underside contrasts beautifully with the glossy dark green upper surface. The young foliage emerges bronze colored and turns gold yellow to yellow brown in autumn. In winter the leaves often remain attached for a long time. Young twigs are gray brown, while the older bark becomes greenish gray and develops small rectangular furrows. The yellow male catkins appear in May at the same time as the leaves unfold. In autumn, oval acorns about two and a half centimeters long develop, half enclosed by the cup.

In the United States, Quercus × warei REGAL PRINCE is a very popular narrow street tree that tolerates road salt well. As a standard tree or feathered tree, it is also of great value in Europe for modern street tree plantings. When used as a feathered tree it can act as a barrier against wind, noise and particulate matter, helping to create a more pleasant microclimate. As a vertical design element it is also very suitable for private gardens. The REGAL PRINCE columnar oak prefers nutrient rich and moisture retentive, slightly acidic soils, but this selection is quite tolerant of most conditions. Wind is also not a problem for this tree.

Types of planting

Tree types

standard trees feathered trees

Use

Location

street avenue park central reservation large garden cemetery windbreak

Pavement

none none

Characteristics

Crown shape

columnar columnar narrow oval narrow oval

Crown structure

dense dense

Height

12 - 15 m

Width

5 - 6 m

Winter hardiness zone

4B - 9B

Aspects

Wind

tolerant to wind

Soil

loess sabulous clay light clay sand loamy soil

Nutrient level

low in nutrients moderately rich in nutrients rich in nutrients

Soil moisture level

dry moist wet

Light requirements

sun partial shade

pH range

acidic neutral

Host plant/forage plant

birds small mammals

Extreme environments

tolerant to salt spray

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Photos

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feathered feathered
Quercus × warei REGAL PRINCE feathered
feathered feathered
Quercus × warei REGAL PRINCE feathered
feathered feathered
Quercus × warei REGAL PRINCE feathered
feathered feathered
Quercus × warei REGAL PRINCE feathered
leaves leaves
Quercus × warei REGAL PRINCE leaves
leaves leaves
Quercus × warei REGAL PRINCE leaves
leaves leaves
Quercus × warei REGAL PRINCE leaves
leaves leaves
Quercus × warei REGAL PRINCE leaves
leaves leaves
Quercus × warei REGAL PRINCE leaves
leaves leaves
Quercus × warei REGAL PRINCE leaves
twigs twigs
Quercus × warei REGAL PRINCE twigs
twigs twigs
Quercus × warei REGAL PRINCE twigs
bark bark
Quercus × warei REGAL PRINCE bark

Flowers

Flowers

catkins discrete pendulous

Flower colour

yellow

Flowering period

April - May

Leaves

Leaf colour

dark green underside white-grey

Leaves

deciduous obovate polished lobate

Autumn colour

yellow golden yellow yellow-brown

Fruits

Fruit colour

brown

Fruits

small acorn

Bark

Bark colour

grey-green

Bark

furrowed

Twigs

Twig colour

green grey-green

Twigs

bare vertical branches finely branched long shoots

Root system

Root system

deep shallow extensive tap root

For and by green professionals

The TreeEbb is a platform for and by green professionals, in which we collect knowledge and experience from the sector and make this available for users. All the details and photos are free to use for non-commercial purposes. Want to share your tree knowledge? Send photographs and additional information to treeebb@ebben.nl

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Winter hardiness

A plant's winter hardiness is the coldest area in which it is frost-resistant. This is based on the average annual minimum temperature. Winter hardiness zones are thirteen different frost zones in steps of 5.5 degrees Celsius. This format is an international standard for the hardiness of plants. The zones in which the plant is frost-resistant are always included in the description of trees and other vegetation.

Winter hardiness is a genetic characteristic and is not influenced by the location in which the plant is cultivated. This means that a plant that has been cultivated for many years in winter-hardiness zone 6 but has a winter hardiness of 3 is perfectly suited for replanting in a colder zone. It will thrive there thanks to its genetic characteristics.

When choosing planting for a project, the winter hardiness of the plants is extremely important. By choosing species that match the zone in which the project is being created, it is possible to ensure that plants can withstand the minimum temperature in that area.

Winter hardiness map
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