This grower is sure of this plant identification.
Original stock from Royal Botanic Garden Edinburgh as a student many years ago given to me by Alfred Evans curator
False goatsbeard, Spiraea
Astilbe genus (False goatsbeard). This genus consists of summer flowering perennials. They have upright stems and tufts of ferny leaves with toothed edges. The flowers are produced in tiny panicles of white to pink blooms. This genus has about 14 species of pretty, early to late summer perennials, and they can be grow in moist ground beside woodland streams. The pointed plume-like panicles of tiny, white to pink or red flowers rise well above the foliage.
They are fully hardy and will need rich moist soil and some will need partial shade. Leave undisturbed if possible, and give an annual spring mulch of well rotted compost.
Grown for their panicles of flowers. Can be used for ground cover.