HARDY PERENNIAL. Ht 50-90cm.
Also known as American great valerian or Greek valerian.
This extremely attractive plant produces tall stems bearing sprays of blue flowers with prominent yellow stamens.
It is a cottage garden favourite which self-seeds after flowering.
This plant is ideal for the back of a border and also good for deep/ large containers.
The flowers can be added to salads as a garnish.
Plant in fairly rich soil in part shade/ full sun.