common oak 'Irtha'

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A very unusual form of small deciduous tree, slowly reaching approximately 10m. The leaves are much reduced and a bit twisted, giving a kind of ribbony appearance. They form clusters at the branch ends which, with the fresh yellow-green leaves in spring, look a bit like blossom. The real flowers are inconspicuous but become acorns which show clearly amongst the leaves.

common oak 'Irtha'

Scientific classification

Species
common oak 'Irtha' (Quercus robur 'Irtha')
Genus
Quercus
Family
Fagaceae
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Toxicity
Trees
Plant type
8-12 metres
Height
4-8 metres
Spread
Deciduous
Foliage
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Habit
Autumn · Spring · Summer
Season of interest
Full sun
Sunlight
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Ideal temperature

common oak 'Irtha' pictures

common oak 'Irtha'

Distribution of common oak 'Irtha'

Distribution map

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Culture

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Toxicity

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Quick identification of common oak 'Irtha'

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common oak 'Irtha' care guide

Deep watering during dry spells, allowing slight surface drying between soakings
Watering
Full sun
Sunlight
Information to be completed
Ideal temperature

Watering

Deep watering during dry spells, allowing slight surface drying between soakings

Fertilizing

Balanced shrub or tree feed once each early spring

Pruning

Little pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. Timing depends on the plant: generally late winter or early spring; plants prone to bleeding and deciduous magnolias need different timing, and deciduous azaleas and lilacs are pruned after flowering.

Propagation

Propagate by hardwood cuttings in autunm

Growing

Suited to small-medium gardens. Grows in any well-drained but moisture-retentive soil in good light. For more information see tree cultivation.

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Common pests and diseases

Diseases

May be susceptible to powdery mildews and honey fungus

Pests

May be susceptible to oak processionary moth, aphids, caterpillars, leaf-mining moths and oak gall wasps

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