Bulb · Liliaceae
Oriental Lily
Lilium
Tall, richly scented summer blooms that perfume a whole garden, with one hard rule: keep them away from cats.
Full sun
Every 3–7 days
USDA 3–9
1–6 ft · 0.3–1.8 m
Overview
Oriental lilies are the big, fragrant lilies that crown high summer, and the scent charges toward you long before the flowers do. They grow from bulbs in the genus Lilium and trace back to species from Japan, which breeders crossed into the showy hybrids gardeners chase today. Stargazer grabs the spotlight, but the whole crew shares those upright stems and huge, heavily perfumed flowers, so there is a lot to love across the group.
These hardy perennials charge back year after year from the same bulb, spreading into fuller clumps as they go. Give them a good spot and the stems shoot to 6 feet (183 cm), hoisting their blooms high above the border in mid to late summer. A couple of seasons in, they hit full stride, and a settled clump puts on a show that rewards every bit of the wait.
One thing every cat owner has to nail down before planting, though. Oriental lilies are deadly to cats, far more than to any other animal, and the danger is real enough to rule them out of some homes flat. Plant them with that locked in and they turn into an easy, generous performer that asks for little beyond sun and soil that drains.
Care
The short version: full sun with a touch of afternoon shade, planted deep in rich soil that drains freely, kept evenly moist with the roots mulched and cool, and a light feed in early spring to launch the season.
Light
Give Oriental lilies full sun and they flower their hearts out, though they will take a little partial shade through the hottest part of the day. The classic play is sun on the flowers and shade on the roots, and that is exactly where a good layer of mulch pays off.
Water
Keep the soil evenly moist but never waterlogged, because standing water rots the bulbs fast. Water every 3 to 7 days as the weather calls for it, and pack down mulch to lock in that moisture and keep the roots cool right through summer.
Soil
Plant them in fertile, humus-rich soil that drains freely, sitting on the acidic to neutral side at a pH of 5.5 to 7.0. Alkaline ground stops them cold, so test first if you are unsure and dig in plenty of organic matter to set them up.
Temperature
Oriental lilies take a wide range in stride, from about 30°F to 84°F (-1°C to 29°C), and the bulbs are tough enough to overwinter right in the ground across their zones. They shrug off summer heat as long as the roots stay cool and moist.
Humidity
Average outdoor humidity suits them just fine, so skip chasing a number. Airflow beats moisture in the air every time, because crowded, damp foliage is exactly what lets botrytis get rolling.
Feeding
Feed with a light hand and they thrive. A balanced fertilizer in early spring, right as the new growth punches up, carries them through the whole season, and heaping on more does nothing.
Pruning
Deadhead the spent flowers, and on cut stems clip the anthers off before the pollen stains everything it touches. Let the foliage die back on its own so it feeds the bulb for next year, then cut the stems down in fall.
Repotting
Divide a clump every 3 to 4 years in fall once it drops into dormancy, and that keeps the blooms big instead of shrinking. Bulbs in containers love a refresh every few years, and thin flowering, crowded clumps, or bulbs shoving to the surface are your green light to act.
Size & spacing
Stems shoot up anywhere from 1 to 6 feet (30 to 183 cm) tall depending on the cultivar, with a spread of 1 to 3 feet (30 to 91 cm). Give each one room so air can rip through, and stake the tallest stems if they need a hand staying upright.
When to plant
Lilies run on a bulb's clock, and it is a satisfying one to follow. Drop the bulbs in fall or early spring, about 6 inches deep, let them root and rocket up stems through spring, and the flowers land from mid to late summer, with some cultivars pushing on into fall.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Plant bulbs in fall or early spring, about 6 inches deep
- Harvest: Mid to late summer, some cultivars into fall
Hardiness
USDA hardiness zones: 3–9
Temperature: down to -40°C
Troubleshooting
Most lily trouble kicks off underground or flares up in a wet spell, so aim your attention there first. Keep watch on the bulbs and the lower foliage, since rot and disease grab hold there before anything else. Match what you are seeing below and jump on it before it climbs the plant.
Soft bulbs and stems that never break through
A soft bulb with no shoot spells bulb rot, and the trail leads straight to soggy soil. A bulb stuck in wet ground just sits there while fungus moves in and takes it apart. Dig out every mushy one and toss it, drive plenty of compost through the bed to get water moving, and set the firm survivors back into a spot that drains fast so they can power away next season.
Fix:
- Improve drainage by amending soil with organic matter
- Remove and discard rotted bulbs
- Replant healthy bulbs in raised or better-drained sites
Brown or gray spots and fuzzy mold after a wet stretch
Cram the foliage together and let it stay damp, and botrytis pounces, spotting the leaves and rotting the stems all through a rainy run. Snip off everything that shows the marks and destroy it fast to shut the outbreak down. Open the plants up so air rushes between them, aim the water at the base instead of the leaves, and the spores lose their grip.
Fix:
- Remove and destroy affected foliage
- Improve air circulation and spacing
- Avoid overhead watering
Chewed leaves and buds with bright red beetles working them over
Spot a flash of scarlet and you have met the lily leaf beetle, whose larvae tear through leaves and buds at a startling clip. Pick the adults and grubs off by hand the instant they turn up and you stay ahead of them. Aphids crowd the buds too, so blast them with the hose or knock them back with insecticidal soap, and keep scouting through spring and early summer to catch every wave before it builds.
Fix:
- Handpick beetles and larvae
- Spray aphids off with water or treat with insecticidal soap
- Monitor regularly through the growing season
Toxicity
This plant comes with a serious warning, so read it before anything else. Oriental lilies are catastrophically toxic to cats, and even a trace of pollen or a sip of the vase water can cause fatal kidney failure, so they have no place in a home with cats. They run far milder for dogs and horses and pose no real danger to people, but the cat risk is the one that decides everything.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds
Safe for
People
Cats Severe
This is the deadly one, full stop, and it demands respect. Any part of the plant, a lick of pollen off the fur, or a sip of vase water can shut a cat's kidneys down, and the early signs slip past easily: vomiting, a sudden refusal of food, and a droopy, worn-out cat. Within a day or two that races into acute kidney failure, which turns fatal fast without emergency care, so a vet visit cannot wait a moment.
Dogs Caution
Dogs come off far lighter than cats here. Chewing the plant tends to trigger some drooling and vomiting, but the kidneys stay out of danger, and most dogs bounce back once it works through.
Horses Caution
A horse that grabs a mouthful of foliage may land a mild stomachache and a bit of drooling. It reads as uncomfortable rather than dangerous, though there is still no reason to let one graze the plant.
Rabbits Caution
Extension sources flag lilies as unsafe for rabbits, so keep the leaves, stems, and flowers off the menu entirely. Set potted plants and cut stems well clear of any rabbit that roams the house or garden.
Livestock Caution
Cattle, goats, and sheep do best kept away from lily plantings, since grazing the foliage can hand them digestive trouble. Fence off any bed where the bulbs are growing.
Birds Caution
Pet birds should not get near the leaves or blooms. Treat the whole plant, pollen and all, as off limits around a cage.
People Safe
Handle Oriental lilies with a free hand, since they pose no poisoning risk to people and no part needs to be eaten or avoided for safety. The pollen does stain skin and clothes, so brush the anthers off cut stems, and wash your hands after handling if a cat shares your home.
Keep all parts of the plant and any cut stems, fallen pollen, and vase water completely out of reach of cats; even brushing against pollen and grooming it off the fur can poison a cat. Wash hands after handling.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
Oriental lilies pour out in a flood of named hybrids, but a few keep charging back into gardens year after year. These are the ones worth knowing by name.
Stargazer
The showstopper of the bunch throws its crimson-pink blooms up toward the sky, rimmed in white and dusted with orange pollen, and it bursts open earlier than most other Oriental lilies.
Rubrum (Lilium speciosum var. rubrum)
A fragrant Japanese show lily that flings its white-and-pink spotted petals right back on themselves.
Casa Blanca
A knockout for its large, pure white, outward-facing flowers and a heady scent that sails clear across a garden.
How to propagate
Lilies multiply so eagerly from the bulb itself that seed rarely gets a look in. Each route below just trades a little speed for how soon the flowers show up, so pick your pace and go.
Bulbs & cormsEasy
Fall when dormant · 1-2 growing seasons to flowering size
The quickest way to multiply your stock is to lift a dormant bulb in fall, snap a few of the fleshy outer scales off, and pot them up. Each scale fires up its own little bulblet, and those hit flowering size in one to two seasons.
Offsets & pupsEasy
Fall · 1-2 seasons
Established bulbs keep pumping out their own little offset bulblets for free. Come fall, break them off the parent and replant each about three times its own height deep, and they bulk up over one to two seasons.
DivisionEasy
Fall when dormant · 1 season to reestablish
When a clump packs in tight, heave it up in fall while it rests and tear it apart into smaller pieces. The divisions dive right back in and bloom again the very next season.
SeedDemanding
Fall or spring · Several years to flowering
Seed is the long game, sown in fall or spring for anyone who loves the wait. Seedlings need several years to reach blooming size, so most growers charge ahead with bulbs instead.
Myths
A cat has to eat the leaves to be poisoned, so pollen and vase water are harmless.
Not a chance, because every part of a true lily is toxic to cats, not just the leaves. A cat can poison itself just by grooming a few grains of pollen off its coat or sipping the vase water, and even a tiny, indirect exposure can trigger fatal kidney failure.
Lilies are equally dangerous to cats and dogs.
The gap between the two is enormous. True lilies cause severe, often fatal kidney failure in cats specifically, while a dog that eats one usually walks away with nothing worse than a brief upset stomach and no kidney harm at all.