Honeylocust Dropping “Seeds” and Thinning: Insect Frass, Not Seeds

A 13-year-old honeylocust has dropped brown “seeds” for two years; this year the mess is heavy and the canopy is thin with many bare branches.

Insect Droppings, Not Seeds

The brown material is likely insect frass (droppings) from leaf-feeding caterpillars or other insects. Identify the pest by collecting samples and consulting a local garden center for targeted insecticide advice.

Tree Resilience

A well-watered, fertilized tree can tolerate some defoliation and will often re-leaf. Natural predators also help regulate pest populations. Proper maintenance supports recovery.