Spreading clumps of wand-like stems with incised dark green leaves topped with generous heads of very pale lavender blue flowers in summer. Average soil in sun. 45cm.
AGM An excellent and very floriferous form which produces masses of rich blue flowers with a hint of purple in late summer and autumn. Drained soil in sun, 45cm.
syn. Silphium trifoliatum. An elegant prairie plant from north America with pretty yellow daisies on the top of stems with narrow leaves in whorls of 3. Not sure of height yet but probably at least 1.8m! Good soil in sun.
