Purple sage can be used un the kitchen as any ordinary sage with the advantage to add colour to the herb or ornamental garden. In my garden it is less vigorous than my other sages. It likes well drained soil, sun and just about any soil will do (it probably dislikes very acid soils though).
Synonyms Salvia officinalis Purpurascens Group
Salvia officinalis 'Purpurea'