Ants on a Young Weeping Cherry: Harmless or a Sign of Trouble?

A young weeping cherry tree had ants crawling on its leaves. The owner wondered if treatment was needed. The expert reassured that ants alone rarely damage trees—they’re usually farming aphids or nesting in cavities. The real concern is what attracts them.

What to Check

• Aphids: Look on leaf undersides for small, soft-bodied insects. Ants “farm” them for honeydew.
• Tree cavities: Ants may nest in decayed wood or hollows.
• Trunk/root damage: Avoid mower/string trimmer injuries, which invite pests and disease.

Action Plan

If the tree looks healthy—good leaf color, no dieback—no treatment is needed. Simply monitor. If aphids are present, a strong spray of water or insecticidal soap can dislodge them. The ants will leave once their food source is gone. Protect the trunk with a mulch ring to prevent mechanical damage.