Genus Cupressocyparis Species leylandii Cultivar 'Emerald Isle' Common Name 'Emerald Isle' Leyland Cypress Patent ID Trademarked Height 20 to 25 Feet Spread 6 to 8 Feet Habit Pyramidal shaped. Fast growth habit. Zone 5 to 9 Culture Full Sun. Flower Flower Color Foliage Soft, bright green on flat sprays. Evergreen. Category: Conifer Description Graceful, pyramidal form from Monrovia Nursery.