What's Eating Your Elephant Ear Philodendron?

Philodendron giganteum

Reviewed by Kiersten Rankel M.S.

Quick Answer

For elephant ear philodendron, the most likely culprits are mealybugs hiding where the petiole meets the leaf and along the central vein on the underside, and thrips that scar the new emerging leaves with silver streaks. Spider mites flare in winter heat. Scale insects creep along the long petioles and central trunk.

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What does the damage look like?

Tap the closest match to jump straight to the fix.

White cottony tufts in leaf joints

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Silver streaks on new leaves

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Tiny pale dots and webs

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Brown bumps stuck to stems

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Pests, ranked by impact

Mealybugs

Damage

High

Removal

Hard

What it looks like

Soft white insects covered in cottony fluff, 2 to 4 mm long. Cluster where each leaf stem meets the central trunk and run in lines along the prominent central vein on the underside of the giant leaves. Insidious because each 3-foot leaf has so many hiding places.

What the damage looks like

White cottony tufts visible at leaf-petiole junctions and along the central vein. A sticky shiny film coats leaves below the cluster. New emerging leaves unfurl stunted or yellowed. Severe infestations slow the plant and stall new leaf production for months.

How to get rid of them

Option 1

Cotton swab dipped in 70% isopropyl alcohol

Dab every visible mealybug. The alcohol melts the waxy coating and kills on contact. Lift each huge leaf and inspect the entire underside along the central vein and lateral veins, then check every leaf-petiole junction. Repeat every 3 days for 3 weeks to catch newly hatched eggs.

Option 2

Insecticidal soap and neem oil rotation, 4 weeks

Spray ready-to-use insecticidal soap on the underside of every leaf and into each leaf-petiole junction at lights-out.

Alternate weekly with cold-pressed neem oil (2 tablespoons plus 1 teaspoon dish soap per gallon of water).

Continue 4 weeks because the vast leaf underside hides eggs that hatch in waves.

Option 3

Isolate the plant from your collection

Move the philodendron at least 6 feet from other houseplants. Mealybugs spread by crawling and a sprawling philodendron's leaves often touch nearby pots. Wipe surrounding surfaces and any tools that touched the infested plant.

Common myth

Stronger alcohol kills mealybugs faster.

95%+ alcohol evaporates faster than it can kill the bug. On the elephant ear philodendron's broad glossy leaves, higher concentrations leave dry brown patches that are very visible at this leaf size. Stick with 70%.

Thrips

Damage

High

Removal

Hard

What it looks like

Slender dark insects 1 to 2 mm long. Walk along leaves rather than fly. Target the tightly furled new leaves emerging from the growing tip, which are the softest tissue on the plant. Tap a new leaf over a sheet of white paper to spot them.

What the damage looks like

Distinctive silver streaking on the upper surface of new leaves, often with tiny black dots (thrips droppings) alongside. New leaves unfurl already scarred and stay scarred for the leaf's whole life. On a plant where each new leaf is a months-long event, the loss compounds fast.

How to get rid of them

Option 1

Blue sticky traps at canopy height

Hang blue sticky cards (Stikem or Trappify, ~$10 per pack) just above the leafy canopy near the growing tip. Thrips are attracted to blue and stick on contact. Replace every 2 weeks. Won't eliminate alone but reduces the breeding population.

Option 2

Spinosad spray, weekly for 3 weeks

Spinosad (Captain Jack's or Monterey Garden Insect Spray, ~$12 to $15) is the most effective home treatment. Spray every leaf surface at lights-out and aim directly into the unfurling new leaves at the growing tip. Repeat weekly for 3 weeks to break the life cycle.

Option 3

Release predatory mites (Amblyseius cucumeris)

Order from Arbico Organics or similar (~$20). Sprinkle on the plant. They eat thrips eggs and nymphs and tuck into leaf folds where sprays struggle to reach. Best for established infestations where damage keeps appearing on each new leaf.

Spider mites

Damage

Medium

Removal

Moderate

What it looks like

Almost invisible without a hand lens. Yellow-green to red-orange specks running along the underside of leaves, especially near the central vein and the lateral veins branching off it. Indoor heated air through winter dries the broad leaves and triggers a population boom.

What the damage looks like

Pale tiny pale dots along the central vein and out into the leaf where colonies expand. Fine webbing strung along the leaf-petiole junction and across the underside. The sheer surface area of these leaves means an infestation can spread for weeks before you notice from above.

How to get rid of them

Option 1

Shower the leaves weekly for 3 weeks

Move the philodendron to the shower or tub. Spray cool water on the underside of every huge leaf for 30 seconds each. Mites can't reattach quickly when knocked off, and the rinse humidity slows survivors. Repeat weekly for 3 weeks.

Option 2

Neem oil at lights-out, every 5 days for 3 rounds

Mix 2 tablespoons cold-pressed neem oil and 1 teaspoon dish soap per gallon of water.

Spray top and bottom of every leaf at lights-out, paying special attention to the central vein and the leaf-petiole junction.

Repeat every 5 days for 3 rounds to cover the full egg-to-adult cycle.

Option 3

Raise humidity above 50%

Run a humidifier near the plant for 50 to 60% relative humidity. Elephant ear philodendron is a tropical understory plant and wants the moisture anyway. Hot dry indoor heating is the climate mites need to breed fast.

Brown soft scale (Coccus hesperidum) clustered on a plant stem

Scale insects

Damage

Medium

Removal

Moderate

What it looks like

Hard or soft brown bumps stuck along the long sturdy petioles and creeping up the central trunk, 1 to 3 mm wide. Look like tiny barnacles. Don't move because they're glued in place. Easier to spot here than on most houseplants because the petioles and trunk are so prominent.

What the damage looks like

Yellowed patches around each cluster on the petioles. A sticky shiny film coats the leaves below, sometimes with sooty black mold. Heavy infestations weaken petioles enough that the giant leaves start drooping under their own weight.

How to get rid of them

Option 1

Scrape and dab with alcohol, weekly for 3 weeks

Scrape every visible bump off the petioles and central trunk with a fingernail or soft toothbrush.

Dab any remaining bumps with a cotton swab dipped in 70% isopropyl alcohol.

Repeat weekly for 3 weeks to catch newly hatched crawlers as they emerge.

Option 2

Horticultural oil spray, weekly for 3 weeks

Spray horticultural oil (Bonide All Seasons, ~$15) on every petiole, the central trunk, and the underside of every leaf. Smothers crawlers and adults. Apply at lights-out, every 7 days for 3 weeks.

Stay ahead of all of them

Four habits that keep elephant ear philodendron pests rare and easy to catch.

Underleaf and joint check, every Sunday

Mealybugs and scale hide where the petiole meets the central trunk, and mites and mealybugs colonize along the central vein on the leaf underside. Lifting one leaf at a time for a 30-second scan catches colonies while they're still small.

Quarantine new houseplants for 2 weeks

Mealybugs and thrips travel home from the nursery on the plant you bought. Two weeks of isolation catches anything before it spreads to your collection, especially important when adding to a sprawling philodendron with so many hiding spots.

Wipe leaves with a damp cloth monthly

These broad glossy leaves are easy to wipe and reward the effort. The wipe catches dust, early spider mites, and scale crawlers before they multiply across the vast underside. Use a soft cloth on each leaf, top and bottom.

Run a humidifier through winter

Dry indoor heat is what tips spider mite populations into a boom on the broad leaf undersides. Holding humidity above 50% from November through March keeps the plant happy and the mites slow.

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About This Article

Kiersten Rankel M.S.

Botanical Data Lead at Greg · Plant Scientist

About the Author

Kiersten Rankel holds an M.S. in Ecology & Evolutionary Biology from Tulane University. A certified Louisiana Master Naturalist, she has over a decade of experience in science communication, with research spanning corals, cypress trees, marsh grasses, and more. At Greg, she curates species data and verifies care recommendations against botanical research.

See Kiersten Rankel's full background on LinkedIn.

Editorial Process

Pest identification and treatment guidance verified against Philodendron giganteum field reports from Greg's botanical database, cross-referenced with university extension sources and published horticultural research.

531+ Greg users growing this plant

USDA hardiness zones 10a–12b

Citations:
NC State Extension
Mealybug photo: Gianni Del Bufalo (CC BY 2.0)
Thrips photo: Ryan Hodnett (CC BY-SA 4.0)
Spider mite photo: Clemson University - USDA Cooperative Extension, Bugwood.org (CC BY 3.0 US)
Scale photo: Whitney Cranshaw, Bugwood.org (CC BY 3.0 US)