How to Fertilize alum root 'Walnut'?
Light balanced feed in spring and early summer

alum root 'Walnut' · Heuchera 'Walnut'
Grow in a fertile, moist but well-drained, neutral soil in sun or partial shade. The woody rootstock tends to lift out of the ground so mulch annually or lift and replant. Tidy up old foliage in spring
Light balanced feed in spring and early summer