Commonly known as “Gaura” it has recently been renamed Oenothera and is in the same family as evening primrose. Loved by bees and other pollinators, it has a delicate appearance and long blooming period from mid-summer to mid/late autumn.
It needs a spot in full sun and is a great plant for drought conditions. It will also tolerate humidity and partial shade.
For the winter it is best to leave the stems to protect the crown from the cold. Cut them down in the spring once the new growth is coming through. It doesn’t like sitting in wet ground especially in winter.