Height x Spread: 50cm x 40cm .
Commonly known as evening primrose, this long flowering perennial has a tall upright habit. Large bowl-shaped vibrant yellow flowers appear in clusters over narrow bright green foliage during mid-summer.
Evening primrose prefers a well-drained soil in a sunny site. This plant is ideal for adding a splash of colour to your flower beds and borders, unlike common evening primrose which is biennial O.'Crown Imperial' is sterile therefore it does not self-seed.