Beth Chatto's Gravel Garden. Allium Nigrum and a very wide selection of allium bulbs in the UK, try Bloms. Cool colors in a hot garden: allium Nigrum is planted with veronica 'Kapitan', stachys byzantia, and a cristophii.
Blue Queen Salvia - Blooms profusely for months! Enjoy summer-long beauty year after year with this brilliant violet-blue Salvia, a member of the mint family. Heat- and drought-resistant hybrid blooms profusely for months with plump spikes of double blooms. Grows 15-18" tall, 12-18" wide in full sun or partial shade. Ships in a 3" pot. Zones 5-9. Salvia nemorosa ‘Blaukonigin’