Phlox paniculata ( Blue Boy Garden Phlox )
Showy , cluster - constitute perennial with a brilliant floral display . leave are narrow and toothed , to 5 in long . From summer to precipitate , fragrant , 1 in efflorescence seem in Brobdingnagian clusters on tall stems above the leaf . Many refer varieties are available in a wide range of colors . corking in border , rock gardens , formal beds and meadows . Mildew may be a problem towards closing of time of year ....