Red Oak (Quercus rubra)
The Red Oak is a large tree with a wide, round crown which can grow to 20-30m. The sharply lobed, leathery, shiny dark green leaves appear very late. The acorns are contained in cups up to one-third of their length. Striking red autumn colour.
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Appearance
The Red Oak is a large tree with a wide, round crown which can grow to 20-30m. The sharply lobed, leathery, shiny dark green leaves appear very late. The acorns are contained in cups up to one-third of their length. Striking red autumn colour.
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Autumn
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Leaves
Deeply pinnate-lobed with deep scalloping; pointed leathery lobes. 12-24cm long, 8-15cm wide, leaf stem 2-8cm long. Leaves are dark green above, pale green below. Very decorative red, orange and yellow autumn colour.
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Leaf upperside
Deeply pinnate-lobed with deep scalloping; pointed leathery lobes. 12-24cm long, 8-15cm wide, leaf stem 2-8cm long. Leaves are dark green above, pale green below. Very decorative red, orange and yellow autumn colour.
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Leaf underside
Deeply pinnate-lobed with deep scalloping; pointed leathery lobes. 12-24cm long, 8-15cm wide, leaf stem 2-8cm long. Leaves are dark green above, pale green below. Very decorative red, orange and yellow autumn colour.
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Flowers
Flowering period IV-V, yellow--green male flowers in pendent clusters of catkins. Female flowers singly or in ear-like clusters at the tips of young shoots.
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Fruits
Brown, short-stalked acorns up to 3cm long. Enclosed up to one-third in a short-stalked cup.
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Bark
Brown or grey-brown bark with shallow furrows. Branches are grey-brown, dark brown or dark grey-green.
Application
Pioneer tree, tip afforestation, noise abatement, wind-break, public areas, parks, urban areas, roadside verges, car parks, pedestrian precincts, pollen(allergy)
Native regions
Western North America, Eastern North America
Location parameters
Light: full sun to off-sun, temperature: normal to cool, soil: dry to moist, soil structure: normal to airy, soil depth: shallow to deep, soil quality: medium, pH value: 5.0 to 7.0
Demands
Sun, heat-tolerant, frost-hardy; for moderately dry to moist soils, likes sandy-loamy, well-drained, acid to neutral soils; avoids high lime concentrations; resistant to urban climates, wind-tolerant
Growth
Height of growth: 20m to 25m, spread:10m to 15m, rapid growth potential, growth habits: wide, spreading
Leaves
Deeply pinnate-lobed with deep scalloping; pointed leathery lobes. 12-24cm long, 8-15cm wide, leaf stem 2-8cm long. Leaves are dark green above, pale green below. Very decorative red, orange and yellow autumn colour.
Flowers
Flowering period IV-V, yellow--green male flowers in pendent clusters of catkins. Female flowers singly or in ear-like clusters at the tips of young shoots.
Fruits
Brown, short-stalked acorns up to 3cm long. Enclosed up to one-third in a short-stalked cup.
Bark
Brown or grey-brown bark with shallow furrows. Branches are grey-brown, dark brown or dark grey-green.
Roots
Surface-rooting, expansive root system