I bought Salvia "Mystic Spires" last summer, captivated by the intense blue of its flowers, and planted it in my cottage-style garden. I cut it back when it finished flowering, and during spring it put on healthy new leafy growth. I have waited expectantly for it to bloom ... but nothing is happening! I have several other Salvias doing well in my garden and blooming, so the conditions must be right. Any suggestions? Do I just have a lazy plant?!