Quercus ellipsoidalis – Northern pin oak, Hill's oak

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Fagaceae

Quercus ellipsoidalis – Northern pin oak, Hill's oak

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An oak tree that bears a strong resemblance to Q. palustris, occurring in the wild in the north-east of North America. There it forms a large tree with a broad ovoid crown up to approx. 25 m in height. Cultivated specimens are no taller than approx. 15 m. The shallow grooves in the grey bark are yellow. For this reason the tree is also known as “Yellow oak”. The ovoid leaf is deep pinnately lobed. The lobes are pointed and carry sharp serrations. The leaves are bright green, light green on the underside turning to deep purple in the autumn. The acorns, 1 - 2 cm in size, are elliptical and are one-third to half enclosed by the cupule. This is what most distinguishes it from Q. palustris that has rounded to flattened acorns one-third to a quarter enclosed in the cupule.
Availability
Clear stem (3)
Specifications
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Height
8 - 15 (25) m
Width
8-15m
Crown
broad ovoid, half-open crown
Bark and branches
greyish-brown, bark fissured, young twigs olive coloured
Leaf
ovoid to elongated, deep pinnately lobed, dark green, 8 - 14 cm
Autumn colour
red, purple
Flowers
gold coloured ♂ catkins, 7 - 10 cm long, May
Fruits
acorns 1 - 2 cm in size, elliptical
Spines/thorns
None
Toxicity
usually not toxic to people, (large) pets and livestock
Soil type
preferably calcareous
Soil moisture
suitable for wet soil
Paving
tolerates no paving
Winter hardiness zone
4 (-34,4 to -28,9 °C)
Wind resistance
good
Other resistances
resistant to frost (WH 1 - 6), can withstand wind, resistant to de-icing salt
Application
avenues and broad streets, industrial areas
Shape
clearstem tree, multi-stem treem
Origin
north-east of North America
Clear stem tree Multi-stem tree loamy soil sandy soil tolerates no paving resistant to de-icing salt resistant to frost (WH 1 - 6) suitable for wet soil can withstand wind broad ovoid 1st size , taller than 12 metres half-open crown green yellow average growing Attractive autumn colour non-toxic (usually)
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Frequently asked questions
Quercus ellipsoidalis

Quercus ellipsoidalis can eventually reach a height of 8 - 15 (25) m, depending on the site and climate conditions.

Quercus ellipsoidalis is average growing and can eventually reach a height of 8 - 15 (25) m, depending on the site and climate conditions.

The leaves of Quercus ellipsoidalis turn red, purple in autumn.

The right time to plant Quercus ellipsoidalis is during the dormancy period. In Western Europe, Quercus ellipsoidalis with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.

Quercus ellipsoidalis blooms in may.
General