What's eating my heucherella sweet tea?

Heucherella Sweet Tea, an intergeneric hybrid (Heuchera × Tiarella), inherits the vine weevil susceptibility of both parents — larvae can kill plants by destroying roots. Foliar nematodes cause angular brown patches on its ornamental caramel-toned leaves. Slugs target new growth. A late-summer beneficial nematode soil drench is the most important single pest-control action.

Adults leave U-shaped notches on leaf margins; larvae destroy roots and the crown below soil, causing sudden wilting and plant death with no early warning signs Drench soil with parasitic nematodes (Steinernema kraussei) in August–September while soil is warm; hand-collect adults at night; examine crowns of collapsing plants for white grubs

Angular dead patches bounded by leaf veins, starting pale and turning brown; spreads rapidly plant-to-plant in wet conditions via water splash Remove and dispose of all affected plants or leaves in the bin, not compost; always water at the base; space plants well for good air movement; buy from certified clean sources

Holes in young, tender leaves, especially in spring or after rain; the soft, new season's growth is most at risk Apply iron phosphate slug bait around plants in spring; use copper barriers or coarse-grit mulch; hand-pick at dusk; avoid thick mulch against the crown