The “Aptos Blue” coast redwood (Sequoia sempervirens “Aptos Blue”) is hardy at U.S. Department of Agriculture plant hardiness zones 8 through 10 or zones 7 through 9, depending on the source. This cultivar grows 70 to 100 feet tall in urban areas, and its own canopy spreads 15 to 30 feet wide. Because of the evergreen tree’s mature size and shallow, spreading root system, don’t plant it nearer than 100 feet in a building’s base.
“Aptos Blue” requires moist, well-drained, acidic soil with a pH range of 4.5 to 6.5. Adding a 3- to 4-inch-thick layer of mulch on top of the ground helps keep a constant degree of moisture, reducing drought stress on the tree. The cultivar also needs exposure to full sun or partial shade. Its seaside tolerance is ranked as good in a medium zone by California Polytechnic State University’s Urban Forest Ecosystems Institute. The tree grows 36 or more inches per year.