These are perennial herbaceous plants native to Asia; generally they grow 30-40 cm in height, but there are dwarf species and also larger species, up to 100-120 cm. They consist of dense, rounded bushes, consisting of thin stems with generally composed leaves, similar to ferns, pointed and notched, dark green in color; some species have bronze or reddish leaves. From June to the end of summer they produce long erect inflorescences, sometimes arched, taller than the bush, pyramid-shaped and with a feathery and soft appearance: they are made up of countless small flowers, red, cream, white, pink or lilac. There are numerous hybrids of astilbe, selected for the color of the flowers or for the decorative leaves.
the astilbe they are grown in a semi-shaded place, where they can enjoy a few hours of sunshine in the cooler periods of the day; these plants can be planted even in full sun, but in this case they need continuous watering, or to be placed near water gardens because otherwise direct sunlight could cause serious damages. Astilbe grows without problems even in complete shade, in this case however their flowering will be very poor.
They are plants that do not fear the cold weather and can even withstand temperatures close to -20 ° C, fear a lot more than the heat, and in the summer months should be shaded, if placed in full sun to prevent the action of direct sunlight during during the hottest hours of the day it can cause very serious damage.