Gambelia speciosa (formerly Galvezia speciosa) is a sprawling evergreen shrub native to the Channel Islands of California and coastal Baja California. It produces dense clusters of tubular red flowers over a long season, reliably drawing hummingbirds, and is one of the more showy natives available for mild-climate gardens.
Grows 3–6 feet tall and wide with a loose, arching habit. Drainage is the critical factor: established plants handle drought and poor rocky or sandy soils well, but wet or heavy clay invites root rot. Full sun works on the coast; afternoon shade reduces stress at hot inland sites. A light shear after the main spring flush tightens the form and encourages rebloom into fall. Propagates readily from semi-hardwood cuttings.
Well suited to fire-wise, low-water, and slope-stabilization plantings across Southern California. Generally deer resistant.
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.
Powdery mildew
White or grey powdery coating on leaves — usually starting on older growth in humid conditions or when nights cool.
Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.