Propagation
Sow fresh seeds in autumn or spring in containers and place in a shaded cold frame. prick out and pot-up when large enough to handle and plant out during spring with the spacing of 1.8 m (6 ft).

Divide the clump during early spring and ensure that there is at least one growth bud on each division. Large divisions can be planted out directly into their permanent positions.

Botanic information
Leaf: The large broad-ovate to almost orbicular leathery textured basal leaves are palmately 3-9 lobed with coarsely serrated margins. The pinnatisect lobes have a long accumulate apex and the hollow, finely pubescent terete petiole is up to 700 mm (28 in) long. The upper surface is a dark green and the underside is pale green with prominent venation. during autumn the leaves turn reddish then yellow before falling.
Note:
The smaller stem leaves are up to 150 mm (6 in) long.

Flower: The red-purple crateriform to cyathiform flowers have 6-tepals with the outer 3-elliptical to orbicular and the stamens do not exceed the perianth segments. The flowers pedestal is up to the 25 mm (1 in) long and they are arranged in a large branch panicle that is held above the foliage on scape that is up to 2 m (6 ft) tall. They appear during early summer and pollinated by wind.

Fruit: The brown oblong to ellipsoid winged achenes are up to 8 mm (⅓ in) wide and the brown-black broadly ovoid seeds are viable but the plant is commonly reproduced vegetatively to maintain true to type.