Echium wildpretii

Tower of Jewels is an unusual biennial plant native to the Canary Islands where it grows on rocky, volcanic hillsides in cool dry summers. It will tolerate temperatures down to 25 F. The first year it produces a 2-3 foot wide basal rosette of silvery green long thin leaves. The second or possibly the third year a 5-7 foot tall flower stem emerges with the same narrow silvery leaves as the rosette. In spring this is topped by hundreds of dark rose-pink flowers with protruding stamens in a dense terminal spike.  Flowers bloom in late spring to early summer in their native habitat. They then set seed and the plant dies. Even in death, it is attractive.

This is a plant for tropical gardens in zones 9-10. However, with a greenhouse and a very large pot, it could be grown further north.