English ivy pests, webbing or sticky leaves: causes and what to do
6 results in the diagnosis tree begin with pests, 5 of them marked likely when the answers fit. They are ordered here for English ivy (Hedera helix), using what its sources say about pests and diseases and humidity and 6 problems recorded for it.
Sources last read 14 September 2026.
Hedera helix, simply ivy, or common ivy, English ivy, European ivy, King's choice ivy, is a species of flowering plant in the family Araliaceae. It is native to most of Europe and parts of western Asia. Wikipedia, CC BY-SA 4.0
Native range: Europe, Medit. to Iran (temperate). Also sold as Baltic Ivy, bentwood, bindwood, Branching Ivy, California Ivy and common English ivy.
What English ivy’s sources say that bears on this
- Pests and diseases
- Can be troubled by aphids, mealybugs, caterpillars, armored scale, soft scale and twospotted spider mites.NC State Extension · read 13 September 2026Can be troubled by aphids, vine weevil, scale insects and greenhouse red spider mite. Diseases: a leaf spot and, rarely, honey fungus.RHS · read 13 September 2026
- Humidity
- ASHRAE recommends indoor relative humidity between 30% and 60%Penn State Extension · read 13 September 2026
How this shows up on an English ivy
Curled, sticky new leaf blades with green or black insects: aphids
Green, black or pale insects crowd the soft tips and buds of the English ivy. New leaf blades curl, and white cast skins collect below.
RHS lists aphids among the pests it may attract. They favor tender tips and buds, so the damage concentrates where the plant is growing.
Telling it apart: What the white bits are. Aphids leave papery cast skins; mealybugs leave wax with an insect inside.
RHS · read 13 September 2026Dull, finely mottled leaf blades and faint webs: spider mites
Seen side-on, the English ivy looks dusty and bleached. Under a lens the undersides move with minute mites, and silk gathers where leaf blades meet the stem.
RHS lists spider mites among the pests it may attract. Mites empty the leaf cells one by one, which is what the pale dots are, and they breed fastest in warm, dry air.
Telling it apart: Where the damage starts. Mites stipple the whole leaf in fine dots; sun scorch bleaches the side facing the window.
RHS · read 13 September 2026Hard, rounded scale on the undersides of the leaf blades
The English ivy is sticky to the touch and yellows slowly. Along the veins on the undersides sit small shell-like scales that lift off with a fingernail.
RHS lists scale insects among the pests it may attract. The insect settles under a waxy shell and feeds on sap for life, so a colony builds quietly along the stems.
Telling it apart: Flick a bump with a fingernail. Scale comes away and leaves a mark; a natural bump on the stem does not move.
RHS · read 13 September 2026Irregular notches bitten from leaf edges by an insect pest
The English ivy wilts and collapses although it has been watered. In the potting mix are cream, C-shaped grubs with brown heads, and few roots remain.
RHS lists vine weevil among the pests it may attract. Grubs hatch in the potting mix and eat the roots out of sight, so a plant in a pot can collapse with little warning.
Telling it apart: The shape of the damage. Weevils bite notches from the edge; caterpillars eat holes anywhere.
RHS · read 13 September 2026Leaves eaten away and webbed together: caterpillars
Holes and ragged edges appear on the leaf blades of the English ivy, with small dark droppings on the leaves below. Some leaf blades may be rolled or tied with silk.
NC State Extension lists caterpillars among the pests it may attract. Their damage is chewing, not sucking, so the tissue is gone rather than discolored.
Telling it apart: Whether tissue is missing. Chewing pests remove it; sap-feeders only discolor it.
NC State Extension · read 13 September 2026Sticky leaf blades and white fluff where they meet the stem: mealybugs
Look into the tightest angles of the vine: white woolly patches there are mealybug colonies, often with a sticky sheen on the leaf blades below them.
NC State Extension lists mealybugs among the pests it may attract. They feed on sap and shed the excess as sticky honeydew, and a colony tucked into the joints spreads before it is noticed.
Telling it apart: Wipe a tuft with a cotton swab. An insect smears or crawls; a mineral deposit or a hair does not.
NC State Extension · read 13 September 2026Possible causes, likeliest first for an English ivy
Most likely spider mites
Ranked higher because English ivy's recorded problems point this way.
- Dull, finely mottled leaf blades and faint webs: spider mites RHS
Why: Spider mites feed on individual leaf cells, and each emptied cell shows as a pale speck.
What to try:
- Move the english ivy away from other plants.
- Wash the leaves, top and underside, with a strong spray of water in a shower or sink.
What would settle it: Hold a sheet of white paper under a leaf and tap the leaf. Tiny specks that move across the paper are mites.
Most likely mealybugs
Ranked higher because English ivy's recorded problems point this way.
- Sticky leaf blades and white fluff where they meet the stem: mealybugs NC State Extension
Why: Mealybugs are soft insects that cover themselves in white wax, which gives the cottony look.
What to try:
- Move the english ivy away from other plants.
- Wipe off every insect you can see with a cotton swab dipped in rubbing alcohol, testing a single leaf first.
What would settle it: Touch a tuft with a cotton swab. If a small, pale, oval insect is underneath, it is a mealybug.
Most likely scale insects
Ranked higher because English ivy's recorded problems point this way.
- Hard, rounded scale on the undersides of the leaf blades RHS
Why: Scale insects settle in one place under a hard or waxy shell and feed on sap.
What to try:
- Move the english ivy away from other plants.
- Scrape the scales off with a fingernail or a soft brush, then wipe the stems and leaves.
What would settle it: Push a bump gently with a fingernail. Scale comes away and leaves a mark; a bump that is part of the english ivy does not move.
Less likely for an English ivy, still possible
Questions
- What usually causes pests on an English ivy?
- For English ivy: spider mites, mealybugs and scale insects.
- How can I tell which one it is on my English ivy?
- What can you see? Fine webbing, and tiny pale speckles on the leaves; White, cottony tufts in the leaf joints; Small brown or pale bumps on stems and leaves that do not move; Clusters of small, soft insects on the new growth; Tiny dark flies around the soil; Sticky, shiny residue, but no insect I can see.
- What do English ivy's sources say about its pests and diseases?
- NC State Extension: Can be troubled by aphids, mealybugs, caterpillars, armored scale, soft scale and twospotted spider mites. RHS: Can be troubled by aphids, vine weevil, scale insects and greenhouse red spider mite. Diseases: a leaf spot and, rarely, honey fungus.
- What does this look like on an English ivy?
- Green, black or pale insects crowd the soft tips and buds of the English ivy. New leaf blades curl, and white cast skins collect below. Telling it apart: What the white bits are. Aphids leave papery cast skins; mealybugs leave wax with an insect inside.
- Is English ivy safe to handle while I check it?
- Its sources list it as toxic to cats, dogs and people. Wash your hands after handling the roots or sap, and keep trimmings away from pets.
Other plants that show pests
Dwarf umbrella treeFine pale speckling on the leaf blades, then webbing at the tips: spider mites
AlocasiaFine pale speckling on the leaves, then webbing at the tips: spider mites
Aloe veraSticky leaves and immobile shell-like insects on the stems
Areca palmDull, finely mottled fronds and faint webs: spider mites
Arrowhead plantCurled, sticky new leaf blades with green or black insects: aphids
Asparagus fernCurled, sticky new fronds with green or black insects: aphids
Something else wrong with the English ivy?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.