Plantain Lily - zone 3-8 Height 18" (28" in bloom) - Plant 20" apart. A medium sized blue hosta that holds its color long into summer, even in sunnier spots. Pointed leaves and attractive shape. It is difficult to find a garden that is without this versatile East Asian native. Lush foliage in diverse colors, heights, and textures, coupled with its ability to excel in deep shade have captured gardener's hearts everywhere.