What's eating my thomas edison dahlia?

Thomas Edison dahlia, a large deep-purple decorative variety, faces the full range of dahlia garden pests. Slugs are the top early-season threat. Earwigs shred the voluminous blooms at night. Aphids and capsid bugs distort tender growth. Deer are attracted to the tall, lush plants. Consistent trapping, pellets, and repellent sprays keep displays intact through summer.

Demolish soft emerging shoots before they reach 6 in. tall, or chew holes through lower leaves; damage peaks in damp, mild springs Ferric phosphate slug pellets applied at tuber planting and throughout the season; gritty mulch or wool pellets as a surface barrier; hand-pick at dusk

Bore into the dense packed petals of large decorative blooms and eat petal margins overnight — cut blooms may contain earwigs, spreading damage indoors Damp newspaper or straw trap in an upturned pot on a cane near each plant; shake out into soapy water each morning through flowering season

Pierce developing shoot tips and buds, leaving brown-spotted, tattered foliage and distorted flower buds that fail to open correctly Pyrethrin or bifenthrin spray targeting growing tips in late spring; remove surrounding weed hosts; clear debris at season end

Thomas Edison's tall stature (up to 4 ft) makes it a visible target — deer strip buds and top shoots, often snapping the main stem Deer repellent spray (reapply weekly); motion-activated deterrents; temporary fencing around beds during key flowering period