English Ivy

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Happiest close to a window but out of the sun’s path, in a room that stays on the cool side. Sun through glass can scorch its leaves, and farther back it gets by, just growing slower.

Give it the coolest window in the house. That’s often a north-facing sill, or an east one where the sun has moved on by late morning. A stand a few feet back from a south or west window also works, clear of the afternoon rays.

Its roots are in the woods of Europe, from Scandinavia east to Russia, and NC State calls it a shade-tolerant vine. It’s also hardy outdoors to USDA zone 4, so cool air is home turf. A sunny sill above a radiator in January, warm from both directions, is the spot it likes least.

If you have to choose, give it less sun and more cool.

Water well about every 4-6 days in summer and 6-9 in winter, letting the surface of the mix dry a little between. Clemson names too little water as one of its main indoor troubles.

A glazed or plastic pot holds moisture longer than terracotta, if you want fewer waterings.

Winter is where it struggles. NC State lists twospotted spider mites among its pests, and in radiator-dry air they can tuck into a thick tangle of ivy strands. If you spot them and that bothers you, consider rinsing the vines under the shower every few weeks; it will likely pull through either way.

Gone for a while? Ten days is fine if it’s soaked the day you leave; pull it back from a sunny window so it lasts longer.

Wind it around a wire hoop or frame for the classic ivy topiary, or let strands spill 3-6 feet from a hanging basket or high shelf; it grows fast enough to keep the snips coming.

Left alone, a strand reaches for anything vertical, gripping with the short aerial rootlets that line its stems. NC State notes they damage paint outdoors, so steer runners away from painted walls.

Any strand lying across damp soil roots at its nodes (Missouri Botanical Garden). Coil a long one back onto the pot, pin it down with a bent hairpin, and the crown fills in; or snip a few and start a second pot.

On variegated kinds, watch for all-⁠green shoots: Clemson notes that cultivars like 'Gold Heart' tend to revert to the plain green, more aggressive form. Clip them at the base to keep the pattern.

Keep it a houseplant: NC State and Missouri Botanical Garden both flag it as invasive outdoors. Indoors, give it height: a basket hung by a cool window, the top of a bookcase, a mantel where strands can fall.

A chewed leaf may irritate the mouth and stomach of a pet or child, with drooling, vomiting, or diarrhea that passes. The ASPCA lists it as toxic to dogs and cats, with stomach signs only.

The leaves carry more of its saponins than the berries do, and the sap can leave a rash on skin, so gloves help when you trim.

Its defense is a set of triterpenoid saponins, along with polyacetylene compounds (NC State). Hederagenin is the saponin the ASPCA names, though one assay of dried leaves found far more hederacoside C, 21.83 mg/g against 0.02 mg/g of hederagenin (Phytochemical Analysis, 2003). For pets, the trouble stays in the gut in the ASPCA’s description.

For people, the list runs longer, to delirium and convulsions after leaves are eaten (NC State). That’s a rare edge, not the usual course of a nibble.

Most nibbles likely pass at home. If symptoms don’t settle, or anything worries you, call Poison Control for a child. For a pet, call your vet or the ASPCA Animal Poison Control Center (a fee may apply).

A dangling vine is a toy to a cat. Hang it high, keep the strands trimmed well above paw reach, or give it a room chewers rarely visit.

1. ASPCA: mild for dogs.
2. Merck Veterinary Manual: mild for dogs (rates the whole genus).
3. Pet Poison Helpline: mild for dogs (rates the whole genus).
4. ASPCA: mild for cats.
5. Merck Veterinary Manual: mild for cats (rates the whole genus).
6. Pet Poison Helpline: mild for cats (rates the whole genus).
7. NC State Extension: mild for kids.

Cats and dogs: Most of the leading sources agree.

Kids: Sources disagree (NC State toxic, UC ANR mild; the majority wins, a tie goes lower).

Happiest at 50-80°F, and it shouldn’t sit below 45°F. It wants at least 35% humidity.

Temperature

50-80°F

Spider mites hide on the leaf undersides, and mealybugs tuck into leaf axils and stem joints. Aphids, scale, and whiteflies visit less often: look at shoot tips, stems, and along the veins.

• Spider mites
• Mealybugs
• Aphids
• Scale
• Whiteflies

Spider mites are its big problem indoors, worst in warm, dry winter air (UMN). NC State also lists aphids, mealybugs, and scale, plus leaf spots and stem rot.

Spider mites are tiny, so you see the damage first: pale, speckled leaves and, in a bad case, fine webbing. Rinse the plant hard in the shower with lukewarm water, undersides included, and repeat every week or so; UMN says repeated washing keeps them down. If they persist, spray with insecticidal soap or horticultural oil, and move it somewhere cooler.

Aphids cluster on the soft new tips (RHS says especially on indoor plants); mealybugs look like tufts of white cotton; scale looks like small brown bumps on the stems. Wipe them off with a cotton swab dipped in rubbing alcohol, then check again next week.

Leaf spots and stem rot come with wet leaves and soggy soil: water the soil, not the leaves, and let the surface dry between soaks (5-7 days in most rooms).

Feed monthly in spring and summer while it grows, and pinch shoot ends about 6 times a year for a bushier plant. Dunk the leaves upside down in soapy water 4 times a year. Repot when it’s top-heavy or dries fast.

• Feed6× a year
• Pinch6× a year
• Clean leaves4× a year
• Repot1× a year

Any ordinary potting mix that drains fast, in a pot with a drainage hole or a hanging basket, so it can trail.

Repot when the roots fill the pot, in spring, one pot size up.

Food is optional: a balanced houseplant fertilizer every two or three months in spring and summer is plenty, and none in winter (Clemson). A white crust on the soil or the pot rim means it’s getting too much.

Each lobed leaf is one plain green, with pale veins fanning across it. The surface is glossy, and the strands grow dense enough to cover the soil completely.