Form: Woody climbing vine.
Leaf retention: Evergreen but deciduous below 20°F.
Growth rate: Moderate to fast.
Mature Size: 15-25' long.
Flowers: Large, trumpet-shaped, purple lobes with white tubes,
inside throat veined purple and white, fragrant.
Bloom: Mid-winter into spring, summer and sometimes fall.
Fruit: Large prickly seed pods.
Leaves: Green, paired leaflets, lance-shaped, glossy, smooth edges.
Stems: No thorns, climbs with tendrils, needs support.
Roots: Forms underground tubers. Invasive in moist, fertile soils.
Wildlife: Attracts hummingbirds, butterflies, bees.
Toxic / Danger: Seed is poisonous if ingested.
Origin: Argentina and southern Brazil.
Cultivation and Uses
USDA hardiness zones: 8b-11. Can die back in very low temperatures
but will recover from roots. Root hardiness 10-15°F.
Sunset climate zones: H1-H2, 9, 12-24.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to part shade.
Water after becoming established: Monthly, or more often to
maintain appearance. Extra water speeds growth.
Soil: Well drained, tolerant, pH 5.5-7.5 (acidic to neutral).
Low salt tolerance. Fertilizing and organic soil amendments cause
rampant growth and should be minimized.
Mulch: To retain moisture and keep roots cool and shaded.
First Year Care: Water frequently to establish an extensive root
Planting: Can be grown in containers.
Prune: Late fall to early winter to keep in bounds. Deadheading
flowers produces more blooms.
Propagation: Stem cuttings, tip layering. Seed has long germination
period and needs scarification.
Uses: Ornamental, privacy screen on trellis, cover for fence or wall.
A member of the Bignonia family and related to Bignonia capreolata: Crossvine.
Former botanical name: Clytostoma callistegioides.
Other common names are Argentine Trumpet and Painted Trumpet.
This moderately vigorous plant covers a large area.
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