Quercus - - Semi-mature and mature Quercus robur 'Fastigiata Koster'

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Quercus robur 'Fastigiata Koster' - English Oak, Common Oak

 

Family:

Fagaceae

Origins:

United Kingdom, Europe, north Africa, western Asia

Plant Type:

Deciduous tree

Size:

12m x 3m

Habit/ Form:

A broad domed tree on a short massive trunk the large branches often twisting.

Leaves:

Alternate, obovate, margin pinnatifid with rounded lobes, bright green aging to dark green, turn yellowish brown in autumn. The leaves do not fall until late in autumn.

Flowers:

Inconspicuous among new growth in spring.

Fruit:

A pale brown oval acorn, 25 - 45mm x 20 -25mm, the involucre (saucer) covers one third of the acorn.

Bark / Trunk:

A massive trunk with deeply furrowed grey bark.

Vigour / Longevity:

Slow to moderate, long lived

Environmental Requirements:

Sunny positions, best in cool climates.

Hardiness:

Frost hardy to -10°C, tolerates periodically wet soils, snow tolerant, tolerates neglect. More tolerant of coastal conditions than most other deciduous trees.

Soil / Drainage:

Prefers deep moist, well drained soils.

Pruning:

Early training to establish a single leader and to lift the lower branches, if access is needed under the crown. As this tree matures it is usually self shaping but can tolerate hard pruning.

Watering:

Not drought tolerant, water in dry summers.

Fertilising:

Apply a complete fertiliser in late winter for spring growth, until established.

Pests / Diseases:

Oak Blotch Leaf Miner, Chlorosis in alkaline soils, treat with Iron Chelates, Aphids, Mildew common in warmer climates.

Uses:

Street tree, shade tree, avenue tree and golf course tree (the hard bark is not damaged by the golf balls).

 

 

© Text reproduced here with the kind permission of Tony Wilson and Barck Books.

 

 

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