Tree · Cupressaceae
Hinoki Cypress
Chamaecyparis obtusa
Give it acidic soil, steady moisture, and shelter from harsh wind, and this slow evergreen holds its shape for a lifetime.
Full sun
Every 5–10 days
USDA 4–8
50–75 ft · 15.2–22.9 m
Overview
The Hinoki cypress is a slow, stately evergreen straight out of the mountain forests of Japan, where the wild trees pile on great age and size. It runs with the false cypresses, the genus Chamaecyparis, which break from the true cypresses on the strength of scale-like foliage held in flat, fanning sprays. Sweep a hand across it and the soft, resinous scent rises, the very quality that has kept its timber prized for centuries.
Out in the garden you'll cross paths with one of its many cultivars long before the towering wild form. Breeders have coaxed dwarfs, golden forms, and twisted, congested shapes out of the species, so one plant can bonsai down to knee height or shoot up as a slender 20-foot column. It pulls real weight as a year-round backbone, green through every season and hardy across USDA zones 4 to 8.
This one rewards patience and pays it back in spades. It grows slowly and asks for next to nothing once it settles, holding to one firm rule: it won't regrow from bare wood, so whatever you cut away stays gone. Plant it in acidic, well-drained soil, hand it sun and shelter, and it delivers decades of quiet, rock-solid structure.
Care
The short version: full sun to part shade in moist, acidic, well-drained soil, kept evenly watered but never waterlogged, with light pruning only and shelter from drying winter wind.
Light
The Hinoki cypress thrives in full sun, which packs its growth dense and fires up the brightest color on the golden cultivars. It'll take partial shade too, but in too little light it stretches open and thin, and the lower branches drop out first.
Water
Hold the soil evenly moist but never waterlogged, watering roughly every 5 to 10 days and stepping it up through a dry spell. Watch it like a hawk while it establishes, since steady moisture in those first seasons carries the most weight. Soggy ground, though, is the one thing it won't forgive.
Soil
Plant it in fertile, acidic, well-drained loam with a pH between 5.0 and 6.5. Nail the drainage, because the roots rot in standing water, so lighten heavy clay with organic matter or perch the tree on a raised spot.
Temperature
This tree shrugs off a wide range, hardy from about -29°F to 100°F (-34°C to 38°C) and content through USDA zones 4 to 8. It powers through real cold, though young plants caught in harsh winter wind can scorch.
Humidity
Ordinary outdoor humidity suits it fine, so there's no number to chase. What counts far more is air movement and shelter from drying wind, which in winter can rip moisture from the foliage faster than frozen roots can send it back.
Feeding
Feed it once in spring with a balanced, slow-release fertilizer built for acid-loving evergreens. A single seasonal feeding does the trick for a tree that grows this slowly, and a formula that holds the soil acidic keeps the foliage a deep, even green.
Pruning
Here's the fun part: this tree wants little to no pruning beyond clearing out dead or damaged branches. The hard rule is never to cut back into bare old wood, which won't resprout, so keep every cut inside the living, green foliage.
Repotting
Container and bonsai specimens crave fresh soil and root work every 2 to 3 years. Watch for roots circling the pot, punching out the drainage holes, water running straight through, or growth crawling to a stop, all of which shout that it's time to repot.
Size & spacing
The full species blows up into a forest giant, hitting 50 to 75 feet (15 to 23 m) tall with a spread of 15 to 25 feet (4.6 to 7.6 m), so hand a landscape specimen serious room. Dwarf cultivars stay a fraction of that, which is exactly why they crush it in smaller gardens, containers, and bonsai.
When to plant
Get a Hinoki cypress into the ground in spring or early fall, when the soil turns easily and the weather stays mild enough for the roots to grab hold before heat or hard frost. Both windows hand this slow-rooting tree the time it needs to establish, and since it's an evergreen grown for its form, no harvest keeps you waiting.
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
Hardiness
USDA hardiness zones: 4–8
Temperature: down to -34°C
Troubleshooting
Nearly every snag with a Hinoki cypress traces to one of three things: soil that stays too wet, wind drying the foliage in winter, or a cut driven into wood that can't grow back. Catch the early signs and you step in before a branch is lost for good. Match what you spot below, then move while it still helps.
Whole tree browning and wilting as it slides downhill
When a tree browns from the inside and the ground refuses to dry, chase down root rot first, since the Phytophthora form thrives in wet soil. Dig in and inspect the roots, because sound ones stay firm and pale while rotting ones go dark and soft. Fix the drainage fast, cut the watering, and lift any survivor onto a raised, well-drained spot, because a Hinoki cypress parked in standing water almost never claws its way back.
Fix:
- Improve drainage and stop overwatering
- Remove and destroy severely affected plants
- Replant in a raised or well-drained site with amended soil
Bronzed, dusty foliage strung with fine webbing
Foliage that dulls to bronze in hot, dry weather points straight to spider mites. Snap a branch over white paper, tap it, and watch the tiny specks start to crawl, and you've got your culprit. Hit the plant with a hard jet of water to knock them loose, chase it with horticultural oil or insecticidal soap, and keep the cypress well watered so it powers right through the setback.
Fix:
- Spray plants forcefully with water to dislodge mites
- Apply horticultural oil or insecticidal soap
- Encourage natural predators by avoiding broad-spectrum insecticides
Little silk bags swinging from chewed, thinning twigs
Those little cones of silk and clipped foliage dangling from the twigs are bagworms, and a hungry larva rides inside every one. Pick them off by hand through fall and winter, when they hold still and stand right out. Catch the young larvae feeding in late spring and a shot of Bacillus thuringiensis wipes them out before they strip a branch bare.
Fix:
- Handpick and destroy bags in fall or winter
- Apply Bacillus thuringiensis or an approved insecticide while larvae are young in late spring to early summer
Scorched brown foliage bursting into view after winter
Brown patches that flare up in late winter, worst on the side that took the weather, spell winter burn, where sun and wind pull moisture from foliage while the roots stay locked in frozen ground. Resist the pruners, because the buds tucked inside may still be green and raring to grow. Let new growth reveal the real damage, trim only what stays dead, and soak the tree deeply each fall before the ground freezes.
Fix:
- Wait for new growth before pruning so you can see the true extent of damage
- Prune out branches that remain dead
- Water well during dry fall periods before the ground freezes
Bare inner branches that flat-out refuse to green up
Interior or lower branches that show only brown wood and won't leaf out have been pushed one step too far, usually by a cut or heavy shade reaching into old leafless wood. Bank on this: a Hinoki cypress won't resprout from bare wood the way a yew does. So keep every cut inside the living foliage and drive light down to the lower limbs, and every branch you want to keep stays green and full.
Fix:
- Avoid cutting branches back beyond living foliage
- Maintain foliage on all branches you want to keep productive
Toxicity
Great news for animal-loving homes: the Hinoki cypress is not toxic and doesn't turn up on the lists of plants that poison cats or dogs. A pet that snatches a sprig might land a brief upset stomach from the fibrous, aromatic foliage, and that's the whole story. Plant it near pets, livestock, and children and grow it with a clear head.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A curious cat that grabs a nibble runs no real risk, since the plant packs no known toxin. A mouthful of the resinous needles might spark a little drooling or a quick upset stomach, and it clears up on its own.
Dogs None
Dogs romp around a Hinoki cypress with zero worry. Chew a sprig and the worst that turns up is usually mild, short-lived stomach upset from the fibrous, aromatic foliage.
Horses Safe
Horses have nothing to fear from the tree, which isn't toxic to them and has never been pinned to poisoning. As with any tree they wouldn't normally graze, one that packs away a big helping of foliage might land a passing bellyache.
Rabbits Safe
Rabbits stay safe near this cypress, with no poisoning risk in play. The tough, resinous foliage isn't their idea of a snack, so most take one taste and bounce off.
Livestock Safe
Cattle, goats, and sheep graze a paddock with a Hinoki cypress safely, since it carries no toxin that touches them. Grazing animals brush right past the bitter evergreen growth anyway.
Birds Safe
Birds thrive around the tree, which often hands them shelter and nesting cover in dense conifers like this. Nothing in the foliage would do them harm.
People Safe
The tree poses no poisoning danger to people, and no part of it gets eaten. Handle the foliage freely, though the aromatic oils may nag very sensitive skin, so rinse up if they do.
As with any plant, nibbling foliage may cause mild stomach upset in pets even though the plant is not considered toxic.
Varieties
Most growers reach for a named cultivar instead of the full-size species, and the lineup runs from tiny bonsai dwarfs all the way to gold-tinged columns. Here are the ones worth knowing by name.
Nana Gracilis
A slow-growing dwarf that wins fans with its dense, shell-like sprays of dark green foliage, which land it a starring role in rock gardens and bonsai.
Crippsii
A golden form whose pendant sprays blaze their brightest yellow when you plant it in full sun.
Gracilis
A compact, slender pyramid of dark green foliage that climbs to about 10 to 20 feet (3 to 6 m).
Fernspray Gold
It throws out arching, fern-like golden-yellow sprays on a loose, layered frame.
Kosteri
A dwarf, spreading cultivar that stacks its bright green foliage into flat, horizontal fans.
Tetragona Aurea
An irregular dwarf whose congested, four-sided golden foliage delivers a texture unlike any of the rest.
How to propagate
Hinoki cypress multiplies a few different ways, but only cuttings and grafts will hand you a faithful copy of a named cultivar. Seed carries the species forward, though it throws variable seedlings.
Stem cuttingsModerate
Late summer to fall · Several weeks to a few months to root
Cuttings are the go-to for cloning a named cultivar, and they earn their keep because an established tree hates being moved. Take semi-hardwood cuttings from late summer into fall and root them under mist, where they dig in over several weeks to a few months.
GraftingDemanding
Late winter · Weeks to months
Nurseries graft the choicer cultivars onto seedling rootstock in late winter, then let the union knit over the weeks to months that follow. It's exacting work, so hand it to growers who've logged the practice.
SeedModerate
Spring · Weeks to germinate
Sow seed in spring to raise the straight species, and watch sprouts pop over a few weeks. Just know the seedlings won't copy a named cultivar, since they don't come true.
Myths
The Hinoki cypress is a true cypress.
It lands in the genus Chamaecyparis, the false cypresses, which break away from the true cypress genus Cupressus even though both ride under the Cupressaceae family. Its other common name, Hinoki false cypress, gives it away outright. This tree is a false cypress, not a true one.
You can hard-prune an overgrown Hinoki cypress back into the bare wood to rejuvenate it.
Unlike a yew, this false cypress fires off no new growth from old leafless wood, so that gambit backfires every time. Cut a branch down to bare brown wood and it just dies. Keep every cut inside the living, green foliage.