Salvia flowers

For a beautiful blue bloom, consider growing salvias. The Salvia blue bedder is a favorite of the O'Neals, and it can be grown as a perennial in zones 8 to 10. "Salvia serves as a supporting filler and adds a striking pop of color in a bouquet," they say. "Salvia is a bloom we give the wiggle test to, to see if it's mature to cut."