⚠️
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Submit a photoYellow Clematis
Clematis tangutica
⚠️ NOXIOUS — a woody vine from central Asia with bright yellow nodding bell-shaped flowers and feathery seed heads like its garden cousins. Still found in older Alberta gardens but now illegal to sell. Climbs and smothers native shrubs and trees along river valleys, especially in Calgary's Bow and Elbow valleys. Forms dense curtains that prevent regeneration.
Quick Facts
Distribution
Urban and river-valley Alberta; spreading
Light
Full sun to part shade
Bloom Time
July–Sept
Soil
Adaptable
Water
Moderate
Use Caution— Mildly toxic (protoanemonin) if chewed — oral irritation, GI upset
Growing & Cultivation
Propagation
DO NOT PROPAGATE. Control: cut vines at base and treat stumps with glyphosate; dig out root mass.
