I bought one Prunella laciniata plant from a garden center in 1997. It is an attractive, low-growing, conservatively-spreading xeric species in my experimental garden at 10,000 feet (see photo). Its foliage is deeply incised and an attractive gray-green in color. The plant is very floriferous, displaying somewhat reddish-violet-hued blossoms set off against dark-red bracts. Even after the flowers fade, the gray-green leaves and dark-red bracts persist into winter, giving extended color to that area of my garden.
I would like to share this lovely plant with others through seeds. I have collected a large supply but so far have been unable to germinate a single seed. Does anyone have experience germinating this particular species of Prunella? I have germinated Prunella x grandiflora in 3 separate colors (Jelitto seeds) with no trouble at all. Does Prunella laciniata need stratification?