Birch-leaf Mountain-mahogany
Cercocarpus betuloides var. betuloides
Care
part shade, full sun
very low
Fast, Medium, Slow; adaptable. Tolerates serpentine soil..
8–20ft tall , 10–12ft wide
Jan-Dec
Evergreen
Resistant
Chaparral and oak woodlands of the Sierra Nevada foothills, Coast Ranges, and transverse ranges from 1000-6000 ft elevation, extending south to San Diego County.
Care Guide
Planting
Plant your Mountain Mahogany in full sun or partial shade with fast to medium drainage - it's adaptable to most soil types, including poor or serpentine soils, so drainage matters more than fertility. Space it according to its mature size (8–20 feet tall) and your desired effect; it works well as a hedge or privacy screen and responds well to pruning if you need to keep it narrow. Plant in fall or winter to take advantage of the rainy season for establishment. Avoid planting in areas that stay wet, as this plant prefers drier conditions.
After Planting
Water weekly through your first summer, then reduce to once monthly (or less) once established - this is a very low-water plant and overwatering is the most common mistake. You can prune lightly or heavily depending on your needs; it responds well to both and can even be cut to the ground for rejuvenation. Year one focuses on root establishment; after that, this fast-growing shrub becomes increasingly drought-tolerant and requires minimal maintenance. It's evergreen and tolerates cold down to 20°F, so no special winter care is needed in the Bay Area.
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Wildlife Supported
Insects
Larvae feed on emerging foliage April-June, form characteristic silk tents
Important larval host; caterpillars feed on new growth
Host plant for multiple subspecies; larvae feed on spring foliage
Parasite/host plant relationship; mistletoe berries provide winter food for birds
Native bee collecting pollen during blooming/budbreak period
Early season pollen source for nesting queens and workers
Host plant for caterpillars; adults present spring through fall
Caterpillars feed on foliage; larvae gregarious on host plant
+5 more species