Steeplechase Arborvitae Western Red Cedar

Steeplechase is a dense, broadly pyramidal hybrid arborvitae selected for finely textured, dark green foliage. The American Conifer Society lists mature dimensions near 20 feet tall by 8 feet wide, matching the catalog size for this cultivar. ## Garden Use Use this evergreen as a tall screen, hedge, or specimen where its upright outline has room to develop. It offers a more finely textured form than Green Giant, but its mature height still calls for careful placement away from buildings, paths, and overhead lines. ## Growing Conditions Choose a site that can accommodate the mature crown and allow the root zone to establish before dry weather. The American Conifer Society lists growth near 2 feet per year, so spacing and screening plans should account for steady growth. The plant patent describes Steeplechase as a branch mutation of Green Giant with a denser, bushier habit and finely textured foliage. ## Maintenance Prune selectively to maintain clearance or shape, avoiding repeated hard cuts into old wood. The cultivar is covered by U.S. Plant Patent 16,094, issued November 1, 2005. See the [American Conifer Society profile](https://conifersociety.org/conifers/thuja-standishii-x-plicata-steeplechase/) and [U.S. plant patent](https://patentimages.storage.googleapis.com/ba/9a/44/fe2bd53a4c4879/USPP16094.pdf) for its identity and measured dimensions.