Coreopsis Leaf Damage: Aphids or Slugs?

Invisible Pests Eating Coreopsis

Holes in leaves with no visible pests suggest either tiny aphids (check leaf undersides and stems) or nocturnal slugs/snails.

Controls

• Aphids: Horticultural soap or strong water spray.
• Slugs: Beer traps, diatomaceous earth, or iron phosphate bait. Organic slug control.

Inspect at night with a flashlight to catch slugs in action.