Bonsai Plum Plossom(Mei Hua) – Orange Frass at the Base? It’s Likely Termites – Quick Guide
A few days ago I noticed a small pile of orange, fine, sawdust-like particles right at the base of my potted Mei Hua (Japanese apricot / Prunus mume). I brushed it away… and two days later, a fresh pile appeared in almost the same spot.
After checking photos and comparing with common pest signs, this is almost certainly termite frass (drywood or subterranean termite droppings).
Key signs that point to termites:
- Fine, uniform orange-tan pellets (often hexagonal under magnification)
- Repeated appearance after cleaning
- Location focused around the trunk base and root flare
- No large holes or obvious bark damage (typical of drywood termites in early stages)
Quick Confirmation Steps
- Gently scrape away surface soil around the root neck and look for tiny exit holes (1–2 mm) or mud tubes.
- Check if the wood at the base feels soft or sounds hollow when tapped lightly.
- Inspect at night with a flashlight — termites are more active after dark.
What to Do Right Away
- Isolate the pot — move it away from other plants onto a hard surface.
- Clean the visible frass with a brush or vacuum (don’t blow it around).
- Apply bait — place termite bait stations (Advance, Sentricon, or similar) near the base. Workers carry the active ingredient back to the colony.
- Soil drench (if needed) — use a labeled imidacloprid or fipronil-based product (diluted properly) as a root-zone treatment.
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Worst case — if the trunk is heavily damaged, consider bare-rooting, washing roots, pruning affected parts, and repotting in fresh soil.
Prevention Tips
- Keep soil on the drier side — termites love constant moisture.
- Elevate pots off the ground.
- Inspect trunk base and soil surface every few months.
Early action usually saves the tree. I’ve started baiting mine — fingers crossed.
Have you seen similar orange frass on your bonsai or potted trees? Drop a comment below.
