Thuja occidentalis 'Smaragd'

One of the finest columnar or narrow, compact pyramidal Arborvitaes growing 10 to 15 feet high and 3 to 4 feet wide. Rich, emerald green, fine-textured foliage persists even through winter. Excellent heat and cold tolerance.

USDA Z5 - Cold Hardy to -10 to -20(F)
Sun to Partial Shade