The line between whether a plant is a "tree" or a "shrub" is sometimes very thin and quite blurry! We use the following criteria to decide which type applies to a certain plant:
Cedrus deodara 'Feelin Blue'
Cephalotaxus harringtonia 'Fritz Huber'
Cephalotaxus harringtonia 'Golden Dragon'
Chamaecyparis obtusa 'Well's Special'
Cryptomeria japonica 'Globosa Nana'
Illicium x 'Orion'
Illicium x 'Scorpio'
Osmanthus fragrans 'Tea Olive'
Syringa x "Red Pixie'