Quercus palustris 'Green Pillar'Columnar pin oak
A columnar form of the pin oak, with a straight trunk and short, ascending branches, giving the height of an oak in a spread of 3 to 4 metres. Deeply cut, glossy leaves, red in autumn, and the urban toughness of the species.
- Columnar crown 3 to 4 metres in spread, with no containment pruning
- Cut, glossy leaf, red in autumn
- Tolerates compaction, temporary waterlogging and urban conditions
About this cultivar
Quercus palustris 'Green Pillar' reaches 12 to 15 metres in height and 3 to 4 in spread, with a narrow crown, dense from the base, that holds its shape without containment pruning. It is an American selection chosen for street planting where the straight species, with its broad crown and low, drooping branches, does not fit.
The leaves, lobed with deep sinuses and fine points, are glossy green in summer and pass through orange and red in autumn, staying on the tree for part of the winter after they have dried.
It prefers moist to wet, acidic soils, suffers from chlorosis on active lime, and tolerates compaction, temporary waterlogging and urban conditions. It grows at a good pace in full sun and withstands cold and wind.
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