Rodgersia podophylla aka Rodgersia

Rodgersia podophylla is a perennial in the saxifrage family. Its native range spans northeastern China, Korea, and parts of Japan. It grows on shaded slopes, in damp woods, and beside streams. In Japan, records place it in mountain woods. These sites lie at 2,300–6,560 feet [700–2,000 metres] above sea level. Gardeners grow it mainly for its large leaves.

The plant forms a leafy mound and spreads through creeping rhizomes. The foliage mound reaches about 3 feet [0.9 metres] tall and wide. Listed garden heights reach 5 feet [1.52 metres]. Spread varies between sources, from 4–8.2 feet [1.22–2.5 metres]. Allow space for the clump to expand over time. Its palmate leaves have coarse teeth and deep veins. Most have five divisions, though some have seven. Leaves near the base reach about 16 inches [0.4 metres] across. Leaves on the stems are smaller. Young leaves show bronze tones, then become green or bronze-green. They turn reddish bronze in autumn before the plant loses them.

Small, creamy-white flowers rise in branched clusters above the leaves. The clusters can reach 1 foot [0.3 metres] long. Chicago Botanic Garden lists flowering from May through August. RHS places flowering in late summer. Bloom may be sparse or absent in some gardens. Missouri Botanical Garden values the flowers as well as the foliage. Chicago places more value on the leaves than the flowers.

Grow this plant in deep, rich soil with steady moisture. Part shade suits it, though RHS also allows full sun. It tolerates boggy soil and poor drainage. RHS lists acid, neutral, and alkaline soils as suitable. Missouri Botanical Garden favours acidic soil rich in humus. Dry soil can cause brown edges on the leaves. Shelter helps protect the broad leaves from wind damage. Its hardiness ratings are USDA zones 5–8 and RHS H6. It suits damp borders, woodland gardens, and pond or stream edges. It can also serve as ground cover.

Divide plants in spring, or raise them from seed. Remove spent flower stalks after bloom. Serious pest and disease problems are uncommon. Slugs and snails may chew the leaves, especially young growth. Powdery mildew is another possible problem. Plants For A Future lists young leaves as edible. It gives no details on their preparation or use. The same source reports no known hazards or medicinal uses.