Fremontodendron californicum is a fast-growing California native shrub or small tree that produces large golden-yellow flowers - technically sepals, as the plant bears no true petals - from late winter into early summer. In warm, dry Western gardens it works as a bold specimen, informal screen, or espalier against a south- or west-facing wall. Plants routinely reach 10–15 feet within a few years under favorable conditions.
Full sun and excellent drainage are non-negotiable. Summer irrigation reliably kills established plants; plant on a slope or in lean, gravelly soil and avoid amending the planting hole with compost or other moisture-retaining materials. The minute stellate hairs covering foliage and stems irritate skin, eyes, and airways - wear gloves, long sleeves, and eye protection when working near or pruning this plant. Native to chaparral, foothill woodland, and rocky canyon slopes from the Sierra Nevada foothills and Coast Ranges south into Baja California, typically at 2,000–6,000 ft elevation. Cold hardiness drops sharply below about 15°F.
Ecoregions:Northwestern Forested MountainsMarine West Coast ForestNorth American DesertsMediterranean CaliforniaTemperate Sierras
Phytophthora Root Rot
Wilting despite moist soil, yellowing leaves, stunted growth, and dark, decayed roots and crown tissue. Vines may collapse during hot weather.
Plant in well-draining soil and avoid waterlogging. Remove and destroy affected vines. Improve drainage with raised beds or amended soil and avoid overwatering.