Columnar Oak - Quercus x Rosacea Columna

A columnar oak that  grows slower then Q. Robur Fastigiata , columna tends to fan out with age, rather then growing straight up.
This  hybrid oak is worth planting as it has interest from spring where its catkins appear ( flowers) leaves are greyish/ green in summer turning shades of yellow in autumn.
Its acorns grow together in groups of 2 -3.

Sapling is 17 inches tall approx