Appropriately named, this completely new rare plant from Japan produces until late September, slowly lengthening spires, up to twelve inches long, of deep royal blue, on many two to three foot stems, each of which is lightly clad with pointed sawt... (Click for more details)

A unique introduction from Japan making a solid dome of numerous, radiating two foot stems clad in jagged-edged pointed leaves, branching terminally into stubby three inch spikes of china blue flowers. (Click for more details)

Numerous long, graceful, pointed spikes of bright blue flowers open from June until late summer. This popular herbaceous border plant also produces excellent cut flowers. (Click for more details)

Handsome individual spikes of blue flowers on tall strong stems sparsely clad with encircling leaves. In autumn, all leaves turn bright yellow, and this was how we spotted it through the trees when collecting seed on Sakhalin Island, Russia (RBS0... (Click for more details)