astilbe 'Irrlicht'

Grow in moist, fertile, humus-rich soil in full sun or, where soil is likely to dry out in summer, grow in partial shade. Plants must be divided every three to four years to maintain vigour

No pruning required but can cut back after flowering, or delay until spring as faded flower spikes can remain attractive in autumn and winter

Propagate by division in late winter or early spring, pot divisions under glass and plant out in late spring

Generally pest-free

May be susceptible to powdery mildews