World Plants

Verbena bonariensis (Purpletop Vervain, Tall Verbena, Pretty Verbena)

USDA Hardiness Zone	8b - 9a
USDA Hardiness Ref.
Canadian Hardiness Zone	8a
Canada Hardiness Ref.
RHS Hardiness Zone	H4
RHS Hardiness Ref.
Temperature (°C)	-9 - (-4)
Temperature (°F)	15 - 25
Height	2 m
Growth	Fast
Flowering Period	June, July, August, September, October

General Description	This species is listed as locally invasive in its natural habitat.
Shape	Mat-forming.
Landscape	May become problematic in the landscape as it seeds quite readily. Plant as a pollinator to attract the Monarch, Painted Lady, Peacock, Red Admiral, Comma and Small Tortoiseshell butterflies as well as bees and hoverflies.
Propagation	Seed.
Cultivation	Plant in partial sun to partial shade in moist but well-drained humus-rich soil of any acidity. Protect from harsh winds.
Notable Specimens	Olds College, Olds, Alberta, Canada. Queen Sirikit Botanic Garden, Mae Rim District, Chiang Mai Province, Thailand.
Habitat	Horticultural origin.
Bark/Stem Description	Wiry, upright, robust flower stems that have a coating of thin, short hair-like fibres.
Leaf Description	Lanceolate, serrated unstemmed leaves that grow from flower stems.
Flower Description	Terminal inflorescences of 20 - 30 long tubular flowers approximately 3 cm long and .5 cm wide.
Colour Description	Medium green stems and leaves with white hair-like fibres. Magenta to violet blooms.
Texture Description	Soft, hairy.