Verbena bonariensis
Patagonian vervain
Common names: Argentine ironweed, Tall ironweed
Photo: frank wouters · CC BY 2.0 · Source
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Description
The Patagonian vervain rises on tall, slender stems topped with small violet flower spikes, creating a light, airy transparency over the bed. It blooms from July until frost and is an irresistible magnet for butterflies and bees. In mild climates it is short‑lived yet persistent and readily self‑sows.
Care instructions
Sow the seeds in February in a warm environment and transplant after the last frost (mid‑May) to a full‑sun location. Water sparingly; the plant tolerates drought well. Cut back spent stems only in spring—seed heads provide winter food for birds and the plant will continue to self‑sow.
Companion planting
Good neighbours
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