alum root 'Plum Royale'

Grow in fertile, moist, but well-drained soil in sun or partial shade. If the soil is moist, a shadier position may be tolerated. To prevent the rhizomes rising to the surface, mulch annually and divide every few years

Remove any dead leaves and deadhead

Can be propagated by division

Prone to vine weevils and leaf and bud eelworm

Maybe affected by Heuchera rust