Song Siren Layla Yarrow ( Achillea Millefollium "song siren layla")- From the Song SIren series, this beautiful yarrow features long lasting violet blooms bringing butterflies, bees and beneficial insects to the garden. Easy to grow and very heat and drought tolerant once established. Excellent for cutting. Blooms late Spring through Summer. Up to 22" tall, mounding habit to about 14" Perennial zones 3-9. One live plant in 3" container.