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 clothed in flat, narrow needles of a deep, glossy dark green that stay that color the whole year through. The needles line the twigs in soft, two-ranked rows, dense enough to read as a solid dark mass from a step back, and the fine branching takes a shearing better than almost any other shrub, which is why it turns up as hedges, screens, and topiary in cold-winter gardens. Hardy through zones 4 to 7, it holds that green through deep cold and deep shade alike.
On female plants, a small cup of soft, translucent red flesh, the aril, opens around a single hard seed in fall, the one bright note against all that green. That red flesh is the lone harmless part, because every other tissue holds taxine alkaloids, a poison that attacks the heart. The needles, bark, and the stony seed inside the red cup stay toxic whether fresh, wilted, or long dried, and the amount that can kill a horse or a child is shockingly small.
Give the roots sharp drainage and treat the plant with the caution it demands, and this dense, dark evergreen lives for decades with almost no fuss. It has no place near pasture, paddock, or play area, and its needled clippings must never be left where an animal might reach them.
Care
The short version: plant this dark-needled evergreen 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 green part of it away from animals and children.
Light
Few evergreens are this easy about light. Japanese yew keeps its deep dark green in anything from full sun to deep shade, though part shade suits it best. That tolerance is what lets it stay dense and richly colored on the shaded 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 is established. The real danger runs opposite to drought, since standing water and heavy soil rot the roots from firm and pale to dark and soft. 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 suits it, but drainage is the part you cannot compromise on. Yew has zero tolerance for wet ground and will rot in it.
Temperature
This is a cold-hardy evergreen, holding its needles from about -20°F to 95°F (-29°C to 35°C). Deep winter cold leaves the green untouched, though dry winter wind can scorch the exposed needles to a rusty bronze.
Humidity
Average outdoor humidity is all it needs, so there is no number to chase. Good air movement matters more, keeping the dense, dark interior dry and free of the scale that would crust the stems.
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, resprouting green even from bare old wood. Shape hedges and topiary in early spring before the pale new growth pushes out against the older dark needles. Never leave the clippings where an animal can reach them, because those needled cuttings stay deadly long after they wilt.
Repotting
Yew is rarely grown in a container 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
Form and size swing widely with the cultivar, from low, wide-spreading mounds to upright 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 is no sowing season to track, only a window for setting young plants in the ground. Plant them in spring or early fall, when the soil is workable and the roots have time to settle before heat or hard frost. The spring flowers are tiny and easy to miss, while female plants ripen their soft 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, dense and evenly dark green, is remarkably trouble-free, and most of what goes wrong shows up first as a change in the color or firmness of the needles and roots. Learn to read those early signs below and you can step in before the damage spreads. Match what you see, then act while it still helps.
Yellowing, browning needles above dark, softened roots
When the deep green fades to sickly yellow and then a dull brown across the foliage, the trouble is root rot underground. Dig in and the once firm, pale roots come up dark, soft, and slick, wrecked by soil that stays too wet. Move the plant to better-drained ground, cut the watering back hard, and lift out any roots too far gone to firm up again.
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, reddish needles on the windward side after winter
Needles that flush reddish-brown to bronze along the wind-facing side after a hard winter show winter burn rather than any disease. Cold, dry wind wicks moisture from the flat little needles faster than the frozen roots can push it back, so the exposed foliage dries to a rusty cast while the sheltered green holds. Soak the plant deeply in fall before the ground locks up, screen it with burlap, and clip out the scorched needles once fresh green pushes in spring.
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
C-shaped notches bitten into the needle edges
Look closely at a fading plant and you may find neat C-shaped notches bitten into the leaf margins, the signature of the black vine weevil, whose pale grubs gnaw the roots out of sight while the adults nick the edges above. Scale and mealybugs may crust the stems and needles, drawing sap from a plant already worn thin. Treat the weevil at both the adult and grub stage, wipe the scale away with horticultural oil, and keep the plant firm and green with sharp drainage.
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 handsome evergreen with a footnote. Nearly every part, from the flat green needles to the stony seed, holds taxine alkaloids that can stop the heart with little or no warning, and dried clippings stay just 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
A single nibble of the dark needles can be fatal to a cat. Trembling and a staggering, unsteady walk give way to hard breathing and collapse as the heart fails, at times with no warning.
Dogs Severe
A dog that chews the needles or bark is in serious danger. Drooling, vomiting, and muscle tremors can build into seizures and sudden cardiac arrest, often within hours.
Horses Severe
Horses are extraordinarily sensitive, and a single mouthful of the green foliage or dried clippings can kill in minutes. Trembling, a wavering gait, and a faltering heartbeat may come first, though many are simply found dead.
Rabbits Severe
The taxine alkaloids stop a rabbit's heart at a tiny dose. Every part of the plant, the green needles and the dried alike, stays deadly.
Livestock Severe
Cattle, sheep, and goats are often found dead within hours of grazing the foliage 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 the hard seed, meeting the same cardiac collapse that strikes other animals. Only the soft red aril flesh is harmless, and the stony 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 bright red aril flesh alone is non-toxic, but the seed within is deadly, so keep children well away and treat no 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, and they differ most in their outline, from tall narrow columns to low spreading mounds. These are the forms you will meet most often.
Taxus × media 'Hicksii'
An Anglojap yew that stands upright and narrowly columnar to about 20 feet, drawing the eye straight up in a tight vertical form.
Taxus × media 'Densiformis'
A dense, low semi-dwarf whose branches fan out wider than the plant grows tall, mounding to around 3 to 4 feet.
Taxus × media 'Hatfieldii'
A male, fruitless cultivar with a broad pyramidal to columnar outline that reaches about 12 feet and never sets the red arils.
Taxus baccata (English yew)
The European parent of the Anglojap hybrids, handsome in leaf but less cold-hardy than Japanese yew.
Taxus canadensis (Canada yew)
A low, spreading North American native that hugs the ground in deep shade and shrugs off harder cold than most.
How to propagate
Yew comes along by two routes, and neither is fast. Cuttings taken from firm shoots keep a cultivar true, while the hard seed inside the red aril is a slow, finicky route for the patient. Handle every part with care at each stage, since the plant is toxic throughout.
Stem cuttingsModerate
Late summer to fall (semi-hardwood cuttings) · Several weeks to a few months to root
Cuttings are the dependable way to copy a named cultivar true to type. Take firm, semi-hardwood shoots in late summer or fall, then wait, since these slow growers push roots from the cut stems only over several weeks to a few months.
SeedDemanding
Fall after cleaning seed from arils · Often a year or more due to deep dormancy
Seed is the slow, patient route. Strip the hard seed from the soft 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, since it is highly toxic.
Myths
The red yew berries are safe to eat because birds eat them.
Only the soft red aril, the fleshy open cup around the seed, is non-toxic, and that pulpy part is what a bird usually passes whole. The hard seed set inside that red cup is packed with taxine alkaloids, and so are the flat green needles and the bark. Swallow the seed and it can kill you, so treat every part of the plant as off-limits.
Dried or wilted yew clippings are safe to feed or discard near animals.
Drying does nothing to the poison locked in the tissue. Wilted, browned clippings stay just as lethal as the fresh green growth, and their limp, softened needles tempt animals that would ignore the stiff living plant. Many horse and livestock deaths trace straight back to trimmings tossed over a fence.