Zone: 8 to 10
Bloom Time: Summer to Fall
Height: 2′ to 3′
The Salvia plant family has a few blue varieties, but Salvia guaranitica “Black and Blue” is my favorite.
Like most Salvias, it requires very little work and blooms all summer long. However, it is a tender perennial that should be treated as an annual in some parts of the country…it comes back every year in my zone 7 garden in South Carolina.
It has a stunning combination of bright blue flowers with black stems.