Botanical Name: Keckiella antirrhinoides
Common Name: Yellow penstemon Type of Plant: dicot: shrub Character summer deciduous Habit of Growth: Overall Shape a loosely-branched shrub, with ascending primary stems and secondary branching forming an open, somewhat irregular canopy; older plants become mounded and wide-spreading Height 4' - 6' (8') Spread equal or more Growth Rate slow-moderate Environment: Exposure outdoors thrives in full-sun habitats; avoid shaded locations Soil tolerates most except poorly-drained clay Hardiness hardy (zones 18-24): prefers warm sunny sites Morphology: Leaves pinnate, opposite, narrowly elliptical, 1/2"-1" long; bright green, with entire margins Flowers bright lemon-yellow, trumpet-shaped, with flaring 2-lipped corolla; 1/2"-3/4" long, borne in showy panicles; April - June Fruit a small papery capsule Propagation: seed or softwood cuttings Usage: an attractive large-sized filler, valued for its heavy flower display and drought tolerance; several planted together form a loose open screen; well-adapted to slope plantings Landscape Care: Watering prefers an occasional deep soak; can survive without summer watering but will go dormant and lose its leaves Fertilizing little needed Pruning head back after flowering to promote a more dense structure if desired Pests/Diseases relatively free - susceptible to root fungus diseases in wet heavily shaded locations Special Conditions/Other Origin: chaparral of Riverside/San Bernardino counties to Baja Family: Scrophulariaceae Notes: |
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