Verbena bonariensis

Verbena bonariensis #1
Verbena bonariensis #1
Verbena bonariensis #2
Verbena bonariensis #2
Family:
Verbenaceae
Synonyms:

Verbena brasiliensis, V.patagonica

Common Names:
purple top, Argentinian vervain
Type:
Herbaceous perennials
Links:
RHS Plant Details
Description and Uses:

V. bonariensis is a tall perennial with erect, branching stems to 2m in height, bearing sparse, oblong leaves and numerous branched clusters of small, purple flowers from summer to autumn.
Often described as a ‘see through plant’ since despite its’ height the wiry stems do not hide other plants.
Long-flowering and attractive to insects.

Cultivation Requirements:

Grow in moist but well-drained or well-drained, moderately fertile soil in full sun. In cold areas, protect with a dry winter mulch.

Cut down in spring as new growth emerges from the base; deadhead in autumn if seed is not required.

Planting:

Best planted in the spring to avoid winter wet.

Problems:

Generally free from pests and diseases. Can rot off in the Winter.

Propagation:

Propagate by seed in pots at 18-21°C in autumn to early spring or allow to self-seed. Self-seeding can be prolific in well-drained and gravelly soils.

Softwood cuttings (basal or heel) in spring or summer.

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