What's eating my spring symphony tiarella?

Spring Symphony Tiarella is prized for its delicate pink flower spikes but shares the genus vulnerability to black vine weevil, whose larvae kill plants by destroying the root system. Slugs and snails are also a seasonal threat on the soft, lobed foliage. Applying nematodes in late summer is the most effective single pest-management step for this cultivar.

Adults scallop leaf margins at night; larvae eat roots and bore into the crown causing sudden collapse with no prior warning Drench with beneficial nematodes (Steinernema kraussei) in late summer while soil is warm; hand-collect adults at dusk; check the roots of any wilting plant for white, legless grubs

Holes through the lobed, often bronze-flushed leaves; flower stems can be severed at ground level in spring Apply iron phosphate bait from first growth emergence; set beer traps; hand-pick at dusk; keep the area around crowns free of dense, moisture-retaining mulch

Angular brown dead zones between leaf veins that spread in wet conditions via water splash to neighboring leaves and plants Remove and bin (do not compost) all affected material; water at the base only; improve air circulation; replace from clean nursery stock