Landscaping Tips from Sean Conway - Garden Design Ideas - Country Living. Conway fashioned his allée from fastigiate hornbeams (Carpinus betulus 'Fastigiata'), which naturally tend toward a columnar shape.
Carpinus betula betulus Fastigiata: This fine tree is columnar in its youth becoming rounded as it matures. It has a dense habit and is very formal in its appearance. The foliage turns yellow in the fall.
Cercidiphyllum japonicum (Katsura Tree) - An unusual but easily grown tree in the UK, known for its beautiful, heart-shaped leaves which turn fantastic shades of yellow, purple and red in autumn. As the leaves fall from the tree late in the year, they gi