I'm really not sure. You can try cross-posting to the Salvia forum.

FataMorgana

Thank you. I'll try the Salvia forum. Don't really expect it to be edible by humans, though...

salvia roemeriana:

Use Ornamental: Adds crimson color and attractive foliage to shady areas. Also a good pot plant for the shade.
Use Wildlife: Flowers attract hummingbirds and butterflies
Use Food: As with other red-flowered Salvias, its flowers are both edible and sweet and can make an attractive garnish.
Conspicuous Flowers: yes
Interesting Foliage: yes
Fragrant Foliage: yes
Attracts: Hummingbirds , Butterflies
Nectar Source: yes
Deer Resistant: High

Greg
Southern Nevada