Spots, webbing, or bugs on my Moth orchid?Phalaenopsis spp.
Spider mites. Wipe the leaves down (avoid soaking the crown), raise humidity nearby without wetting the leaves, and treat with insecticidal soap or neem oil weekly until clear. Isolate it from other plants.
If something is visibly living on your Moth orchid — or its leaves have suspicious spots — catching it early is everything. Here's how to identify the usual suspects and treat them.
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What's causing it
Spider mites
How to tell: Fine webbing in the leaf joints, tiny moving dots, and a stippled, dusty look to the leaves. They thrive in the dry air many homes have.
The fix: Wipe the leaves down (avoid soaking the crown), raise humidity nearby without wetting the leaves, and treat with insecticidal soap or neem oil weekly until clear. Isolate it from other plants.
Mealybugs
How to tell: White, cottony fluff tucked into leaf joints and along stems, sometimes with sticky residue.
The fix: Dab each one with a cotton bud dipped in rubbing alcohol, then treat with neem oil. Check weekly — they hide.
Scale
How to tell: Small, brown, limpet-like bumps stuck to stems and the undersides of leaves, often with sticky honeydew.
The fix: Scrape them off gently with a fingernail or old toothbrush, then treat with neem oil and keep checking.
Fungal or bacterial spot
How to tell: Soft, translucent, or black-edged spots on leaves, often after water sat in the crown or on the leaves.
The fix: Remove affected tissue with a clean blade, keep water off the crown and leaves entirely, and improve airflow around the plant.
Sunburn (not a pest)
How to tell: Dry, bleached, or brown dry patches only where strong direct sun hits the leaf, with no bugs or webbing — Moth orchid is medium / indirect light.
The fix: Move it back from the glass into its medium / indirect light range.
Not sure which one it is?
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Get the app →Prevention
Inspect new plants before bringing them home, keep water off the crown and leaves, check the undersides of leaves now and then, and isolate anything infested.
Common questions
How do I get rid of bugs on my Moth orchid naturally?
For most houseplant pests: isolate the plant, rinse it off, wipe the leaves, and treat with insecticidal soap or neem oil once a week until they're gone. Dab mealybugs with rubbing alcohol. Persistence beats strength.
Are pest treatments safe around pets?
Neem oil and pesticides can irritate or harm curious pets — keep treated plants out of reach while they dry, follow the label, and check with your vet or ASPCA if a pet ingests any.
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