Zone 5 Salvias are generally hardy to -20 degrees F. They are mainly herbaceous perennials with soft foliage that dies back to the ground for winter. A few are subshrubs -- semi-woody perennials.
(Nuevo Leon Hybrid Sage) Imagine tiny, smooth, green leaves and deeper lavender-blue flowers than those of Salvia lycioides x greggii 'San Isidro'. With its midnight purple flowers, Nuevo Leon is a dramatic Salvia greggii hybrid.
(Yunnan Sage or yun nan shu wei cao) Yunnan Sage's tall spikes of violet-to-purple flowers bloom from summer into fall. Native to Southwestern China's provinces of Yunnan, Guizhou and Sichuan, it grows on shady, grassy hillsides and along forest margins at elevations up to 9,500 feet.