How to Grow Perennial Blue Salvia — Salvia x superba
Perennial blue salvia, Salvia x superba, bear slender, terminal racemes of bright violet or purple flower from midsummer to early autumn. Perennial blue salvia is a clump-forming, erect, branched perennial with lance-shaped mid-green leaves. It grows up to 3 feet (91cm) tall. It grows best in Zones 5 to 9. Get to know perennial blue…