How to Propagate astilbe 'Opal'?
Propagate by division in late winter or early spring, pot divisions under glass and plant out in late spring

astilbe 'Opal' · Astilbe 'Opal'
Grow in moist, fertile, humus-rich soil in full sun, or in partial shade if soil is likely to dry out in the summer. Plants must be divided every three to four years to maintain vigour
Propagate by division in late winter or early spring, pot divisions under glass and plant out in late spring