Tree · Taxaceae
Japanese Yew
Taxus cuspidata
A tough, shade-loving evergreen for hedges and topiary that is also one of the deadliest plants you can put in a yard.
Partial shade
Every 7–14 days
USDA 4–7
4–25 ft · 1.2–7.6 m
Overview
Japanese yew is a slow-growing evergreen conifer prized for dark green needles that hold their color all year. It takes shearing better than almost any other shrub, which is why you see it clipped into hedges, screens, and topiary across cold-winter gardens. Hardy through zones 4 to 7, it shrugs off deep cold and deep shade alike.
What sets it apart is also what makes it dangerous. Every part of the plant except the soft red aril holds taxine alkaloids, a poison that attacks the heart. The needles, bark, and seeds stay toxic whether fresh, wilted, or long dried, and the amount it takes to kill a horse or a child is shockingly small.
Grow it where drainage is sharp and the danger is understood. It asks little once established and lives for decades, but it has no place near pasture, paddock, or play area, and clippings must never be dumped where an animal might reach them.
Care
The short version: plant it in well-drained soil in sun to deep shade, water until it settles in and then only in drought, shear in early spring, and keep every part of it away from animals and children.
Light
Few plants are this easy about light. Japanese yew grows in full sun straight through to deep shade, though part shade suits it best. That tolerance is what lets it thrive on the north side of a house where little else will.
Water
Keep the soil evenly moist but never soggy while a young plant settles in, then water mainly during dry spells once it's established. The real danger is the opposite of drought, since standing water and heavy soil bring on fatal root rot. Let the top half of the soil dry between drinks.
Soil
Give it moist, fertile, well-drained sandy or loamy soil and it asks for little else. A pH from 5.5 to 7.0 works fine, but drainage is the part you can't compromise on. Yew has zero tolerance for wet ground and will rot in it.
Temperature
This is a cold-hardy evergreen, comfortable from about -20°F to 95°F (-29°C to 35°C). Deep winter cold is no problem, though dry winter wind can scorch the needles on exposed plants.
Humidity
Average outdoor humidity is all it needs, so there's no number to chase. Good air movement does more good than any moisture target, helping the dense interior stay dry and free of pests.
Feeding
A light hand is enough. Work in a balanced slow-release fertilizer or composted organic matter in early spring and leave it at that, since this slow grower has no appetite for heavy feeding.
Pruning
Yew is one of the few conifers that takes hard shearing and renewal pruning in stride, even cutting back into old wood. Shape hedges and topiary in early spring before new growth pushes. Never leave the clippings where an animal can reach them, because they stay deadly long after they wilt.
Repotting
Yew is rarely grown in containers and seldom needs repotting. When roots start circling the pot, pushing out the drainage holes, or water runs straight through, move it up a size or into the ground.
Size & spacing
Size swings widely with the cultivar, from low spreaders to columns reaching 4 to 25 feet (1.2 to 7.5 m) tall and spreading 5 to 25 feet (1.5 to 7.5 m) across. Read the tag for your variety and give it room to fill out without crowding.
When to plant
Yew is a woody evergreen, so there's no sowing season to track, just a window for getting young plants in the ground. Set them out in spring or early fall when the soil is workable and roots have time to settle before heat or hard frost. Inconspicuous flowers come in spring, and female plants carry their red arils into fall.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Spring or early fall
- Harvest: Inconspicuous spring; red arils on female plants in fall
Hardiness
USDA hardiness zones: 4–7
Temperature: down to -34°C
Troubleshooting
A healthy yew is remarkably trouble-free, and most of what goes wrong traces back to wet feet, harsh winter exposure, or a few persistent pests. Learn the early signs below and you can step in before a problem takes hold. Match what you see, then act while it still helps.
Yellowing, browning foliage over dark, mushy roots
This is root rot, almost always from soil that stays too wet. Yews have no patience for standing water, and a low or compacted spot will slowly drown the roots until the whole plant gives out. Move the plant to better-drained ground, ease off the watering, and pull out anything too far gone to save.
Fix:
- Improve drainage or relocate the plant to a well-drained site
- Reduce watering and avoid standing water
- Remove and discard severely affected plants
Bronzed, brown needles on the windward side after winter
This is winter burn, the cold and dry winter wind pulling moisture from the needles faster than frozen roots can replace it. It shows up worst on the side facing the wind and sun, while sheltered foliage stays green. Water deeply in fall before the ground freezes, screen exposed plants with burlap, and trim out the dead growth once spring pushes new shoots.
Fix:
- Water thoroughly in fall before the ground freezes
- Provide a windbreak or burlap screen in exposed sites
- Prune out dead foliage in spring once new growth resumes
Notched leaf edges with a plant that wilts and fades
The black vine weevil does the real damage out of sight, its grubs chewing the roots while the adults leave telltale C-shaped notches along the leaf margins. Scale and mealybugs can pile on, sapping a plant that's already struggling. Treat for the weevil at both the adult and grub stage, knock back scale with horticultural oil, and keep the plant vigorous with sharp drainage and steady care.
Fix:
- Treat for weevils targeting adults and larvae
- Control scale and mealybugs with horticultural oil
- Maintain plant vigor with proper drainage and care
Toxicity
Treat this plant as a serious hazard, not a garden ornament with a footnote. Nearly every part holds taxine alkaloids that can stop the heart with little or no warning, and dried clippings stay every bit as lethal as fresh growth. It has killed cats, dogs, horses, livestock, and people, so keep it far from animals and children and never plant it near pasture.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Severe
Even a nibble can be deadly. A cat may tremble, stagger, and struggle to breathe, then collapse as the heart fails, sometimes with no warning at all.
Dogs Severe
A dog that chews any part is in serious danger. Drooling, vomiting, and muscle tremors can give way to seizures and sudden cardiac arrest, often within hours.
Horses Severe
Horses are exquisitely sensitive, and a mouthful of foliage or clippings can kill in minutes. Trembling, an unsteady gait, and a slowing, faltering heartbeat may precede collapse, though many are simply found dead.
Rabbits Severe
The taxine alkaloids stop a rabbit's heart just as readily, and the dose that does it is tiny. Keep every part of the plant, fresh or dried, well out of reach.
Livestock Severe
Cattle, sheep, and goats are often found dead within hours of grazing yew or eating dumped trimmings. Those that linger show trembling, labored breathing, and sudden collapse from heart failure.
Birds Severe
Birds can be poisoned by the needles and seed, with the same cardiac collapse that strikes other animals. Only the soft red aril flesh is harmless, and the hard seed inside it is not.
People Caution
This is one of the most dangerous plants in any yard, and human deaths from eating the needles or seeds are well documented. The red aril flesh alone is non-toxic, but the seed within it is deadly, so keep children well away and never treat any green part as safe.
Never leave yew prunings or clippings where animals can reach them; wilted and dried clippings remain lethal. Keep all plant parts away from children, pets, horses, and livestock, and never plant near pasture or dump trimmings within animal reach.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Most landscape yews are Anglojap hybrids or close relatives, chosen for their shape and hardiness. These are the ones you'll meet most often.
Taxus × media 'Hicksii'
An Anglojap yew that grows upright and columnar to about 20 feet, which makes it a favorite for tall hedges and screens.
Taxus × media 'Densiformis'
A dense, low semi-dwarf that spreads wider than it grows tall, topping out around 3 to 4 feet.
Taxus × media 'Hatfieldii'
A male, fruitless cultivar with a broad pyramidal to columnar shape that reaches about 12 feet.
Taxus baccata (English yew)
The European parent of the Anglojap hybrids, handsome but less cold-hardy than Japanese yew.
Taxus canadensis (Canada yew)
A low, spreading North American native that takes deep shade and shrugs off harder cold than most.
How to propagate
Yews multiply two ways, and neither is fast. Cuttings are how nurseries keep a cultivar true, while seed is a slow, finicky route best left to the patient. Handle every part with care, since the plant is toxic at each stage.
Stem cuttingsModerate
Late summer to fall (semi-hardwood cuttings) · Several weeks to a few months to root
Cuttings are the standard way to copy a named cultivar true to type. Take semi-hardwood cuttings in late summer or fall, then settle in for a wait, since yews are slow and roots can take anywhere from several weeks to a few months to form.
SeedDemanding
Fall after cleaning seed from arils · Often a year or more due to deep dormancy
Growing from seed is a project for the patient. Clean the seed from the red arils in fall and give it a long cold stratification to break a deep dormancy, after which it sprouts slowly and unevenly, often a year or more later. Handle the seed with care, because it is highly toxic.
Myths
The red yew berries are safe to eat because birds eat them.
Only the soft red aril, the fleshy cup around the seed, is non-toxic, and that's the part a bird usually passes whole. The hard seed inside is loaded with taxine alkaloids, as are the needles and bark. Swallow the seed and it can kill you, so treat the whole plant as off-limits.
Dried or wilted yew clippings are safe to feed or discard near animals.
Drying does nothing to the poison. Wilted and dead clippings stay just as lethal as fresh growth, and they are a common killer because the limp foliage tempts animals that would leave the living plant alone. Many horse and livestock deaths trace straight back to trimmings tossed over a fence.