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:
Abies firma, Japanese Fir
Abies pinsapo 'Aurea', Golden Spanish Fir
Abies pinsapo 'Glauca', Blue Spanish Fir
Cedrus deodara 'Eisregen', Hardy Deodar Cedar
Cryptomeria japonica 'Rein's Dense Jade'
Cryptomeria japonica 'Yellow Twig'
Cunninghamia lanceolata 'Glauca'
Ilex pedunculosa 'Stevens'
Picea glauca 'Gold Tip'
Picea orientalis 'Skylands'
Sequoia sempervirens 'Atlanta'