Astilbe WhiteAstilbe White Astilbe White is a hardy, shade loving, herbaceous perennial. Flowers appear in the summer, when delicate plumes of white flowers bloom on tall, slender stems. These flowers are a favourite of butterflies and other pollinators, and add elegance to cut flower displays. The flowers are complemented by glossy green, fern like foliage. Astilbes are great for shady borders and planting en masse for a stunning display. Another great