What's eating my iron butterfly tiarella?

Iron Butterfly Tiarella is a compact, deeply lobed cultivar that shares the genus's main vulnerabilities. Black vine weevil is the most damaging pest, with larvae silently destroying the root system. Slugs and snails attack young growth, and foliar nematodes can cause angular leaf spots. Vine weevil control in late summer is the priority preventive task.

Notched leaf margins from adult feeding; larvae chew roots and crowns below soil level, causing abrupt plant wilt or death Apply soil-drench nematodes (Steinernema kraussei) in August–September when soil is warm and moist; hand-collect adults at night; inspect crowns of declining plants for larvae

Ragged holes in the ornamental lobed leaves; young divisions are especially vulnerable in spring Scatter iron phosphate bait around plants in spring and after rain; set beer traps nearby; hand-pick after dark; avoid thick moist mulch directly against crowns

Angular, wedge-shaped dead patches between veins on lower leaves; spreads upward through the plant via water splash Remove and discard all affected plant material; avoid wetting leaves when irrigating; never compost suspect foliage; source new stock from reputable, certified-clean suppliers