Verbena rigida (syn. v. venosa) slender vervain
Symbivit Tric (arbuscular)
Symbivit (arbuscular)Slender vervain is a South American perennial from Brasil and Argentina which is cultivated in temperate parts of the world as a self-seeding annual. It usually germinates only when the weather has turned really hot which is mid to late June in Central Europe and starts to flower within a few weeks afterwards. Plants that were overwintered in a pot indoors and planted out in spring will flower about a week earlier.
Slender vervain makes lax corymbs or short terminal spikes composed of salverform flowers of vibrant magenta colour atop 40-60 cm tall, many-branched, slightly procumbent stems. Leaves are quite handsome, mid green, lance-shaped, coarsely toothed, and rough. Flowering lasts until the last sunny and warm days of autumn, commonly early to mid October.
Last update 11-11-2021
The plant hates too much water and naturally occupies dry slopes and plains. It is not fussy about soil pH, it will live in almost any free-draining soil. Feeding is not necessary but selective fertilizes may promote formation of new flowers during summer. Perennial hardiness is irrelevant if the plant is cultivated as a self-seeding annual.
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