How to Propagate American meadowsweet?
Propagate suckering species such as S. alba by division in late summer or early spring. Propagate by softwood or semi-ripe cuttings in spring to late summer or hardwood cuttings in winter

American meadowsweet · Spiraea alba
Also known as: meadow sweet; pale bridewort; queen of the meadows
Grow in most moist soils, including wet and boggy soils, tolerant of all but the most extreme conditions, in full sun or light shade
Propagate suckering species such as S. alba by division in late summer or early spring. Propagate by softwood or semi-ripe cuttings in spring to late summer or hardwood cuttings in winter