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Gaura (Gaura lindheimeri, now also classified as Oenothera lindheimeri) is a perennial herbaceous plant native to Texas and Louisiana, much loved for its slender, airy stems and small white-pink flowers that look like butterflies fluttering in the breeze.
A member of the Onagraceae family, it grows in a bushy, arching habit, 60-100 cm (24-39 in) tall. The slender, flexible stems carry numerous small four-petaled flowers.
The bloom is remarkably long, from late spring through the first autumn frosts, with flowers opening progressively along the stem.
Sow in spring, either in trays or directly outdoors, covering the seeds just below the surface. Germination takes 15-25 days at 18-22°C (64-72°F).
It prefers well-drained soil, even poor and stony ground, in full sun. Once established it develops a long taproot that makes it very drought-tolerant.
Thin plants to about 40-50 cm (16-20 in) apart; it needs little care during the season, aside from a light tidy-up prune at the end of winter.
Avoid heavy soil and waterlogging, which can damage the taproot. In areas with very cold winters it can benefit from a protective mulch layer.
A hardy, resistant plant, rarely bothered by pests. The main risk remains root rot in soil that's too wet or compacted.
The name Gaura comes from the Greek "gauros" (superb, magnificent), a tribute to the grace of its flowers. It's one of the most popular plants in modern naturalistic gardens and mixed borders thanks to its light, continuous movement.