Penstemon Azureus

This lovely blue-purple penstemon with thick bluish green leaves is native to the foothills and middle elevations of the Sierras where it thrives in sun to part shade with good drainage. It is drought tolerant and more importantly, one of the more garden tolerant ones. Refined, neat, and tidy, in warmer countries it will attract hummingbirds if you place it on or in a rock wall