Green Rocket Leyland Cypress

Green Rocket Leyland cypress is an evergreen hybrid selected for its straight upright leader, narrow pyramidal outline, and dark green scale-like foliage. Its dense vertical form suits a tall screen or windbreak where there is room for a large tree. ## Form and placement The cultivar patent describes a narrow, upright pyramid with a sturdy leader and dark green foliage. Nursery listings give mature heights around 25–35 feet and widths around 8–10 feet, though another product profile lists a somewhat smaller range. Leave enough space for the tree to develop rather than relying on continual shearing to hold it narrow. ## Growing conditions Plant in full sun and moist, well-drained soil. The cultivar patent reports cold tolerance to USDA Zone 6, while current sellers place the selection in Zones 6–10. Water regularly while roots establish and during extended dry spells. Its straight leader and naturally narrow shape make it useful for a property border, hedge, or privacy screen. Sources: [Green Rocket plant patent](https://patents.google.com/patent/US20110209258P1/en), [Briar Patch Farm and Nursery](https://www.briarpatchnursery.com/2025/Evergreens-2025.pdf), [PlantingTree product profile](https://www.plantingtree.com/products/green-rocket-leyland-cypress). ## Maintenance Keep the root zone evenly moist during establishment, then water deeply during prolonged dry weather. Remove damaged branches and prune selectively if the tree is being maintained as a screen. Preserve the central leader to retain its characteristic upright outline.