3 Thuja Cypress Thuja 'Smaragd' - Hardy plantUpright and forming a narrow cone, the white cedar 'Smaragd' (Thuja occidentalis) is small to medium sized and ideal as an evergreen hedge or a solitary tree! Ideal for small gardens. The Thuja stands up well to sea winds. The 'Smaragd' should be pruned once a year, in autumn. Plant the hardy Thuja in a nice sheltered spot in full sun or partial shade. Keep the soil moist. Remember to add extra water during dry periods. A welcome addition!