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 that comes from the mountain forests of Japan, where the wild trees get old and big. It's one of the false cypresses, in the genus Chamaecyparis, and what sets it apart from the true cypresses is its scale-like foliage that lies in flat, fanning sprays. Brush a hand across it and you'll pick up that soft, resinous scent that has made its timber a prize for centuries.
Out in the garden, though, you're way more likely to run into one of its many cultivars than the giant wild form. Growers have teased dwarfs, golden forms, and twisted, congested shapes out of the species, so the same plant can be a knee-high bonsai or a slim 20-foot column. Either way, it makes a great year-round backbone, green in every season and hardy across USDA zones 4 to 8.
This is a tree for the patient gardener. It grows slowly and doesn't ask for much once it's settled, but it does hold one firm rule: it won't regrow from bare wood, so whatever you cut away is gone for good. Give it acidic, well-drained soil, some sun and a bit of shelter, and it'll pay you back with decades of quiet, dependable structure.
Care
The short version: full sun to part shade in moist, acidic, well-drained soil, kept evenly watered but never soggy, with just light pruning and some shelter from drying winter wind.
Light
A Hinoki cypress is happiest in full sun, which keeps the growth nice and dense and pulls the brightest color out of the golden cultivars. It'll put up with partial shade too, but in too little light it goes open and thin, and the lower branches are the first to fade.
Water
Keep the soil evenly moist but never waterlogged, which usually means watering every 5 to 10 days and a bit more often during a dry spell. Pay extra attention while it's getting established, since that steady moisture in the early seasons is what counts most. Soggy ground, though? That's the one thing it won't forgive.
Soil
Give it fertile, acidic, well-drained loam with a pH somewhere between 5.0 and 6.5. Good drainage really isn't optional here, because the roots rot in standing water, so lighten up heavy clay with organic matter or set the tree on a raised spot.
Temperature
It's a genuinely tough tree, hardy from about -29°F to 100°F (-34°C to 38°C) and happy through USDA zones 4 to 8. It handles serious cold no problem, though a young plant caught out in harsh winter wind can scorch.
Humidity
Regular outdoor humidity suits it just fine, so there's no number you need to chase. What matters way more is air movement and shelter from drying wind, which in winter can pull moisture out of the foliage faster than the frozen roots can send it back up.
Feeding
Feed it just once, in spring, with a balanced, slow-release fertilizer made for acid-loving evergreens. One seasonal feeding is plenty for a tree that grows this slowly, and a formula that keeps the soil acidic helps the foliage stay a deep, even green.
Pruning
Lucky for you, this is a tree that wants little to no pruning past clearing out the dead or damaged branches. The big rule is never to cut back into bare old wood, because it won't resprout, so keep every cut inside the living, green foliage.
Repotting
Container and bonsai specimens like fresh soil and a bit of root work every 2 to 3 years. Keep an eye out for roots circling the pot, poking out the drainage holes, water running straight through, or growth slowing to a crawl, because any of those means it's time to repot.
Size & spacing
The full species is a real 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 a landscape specimen needs plenty of room. Dwarf cultivars stay just a fraction of that, which is exactly why they're perfect for smaller gardens, containers, and bonsai.
When to plant
Plant a Hinoki cypress in spring or early fall, when the soil's easy to dig and the weather's mild enough for the roots to settle in before summer heat or a hard frost. Either window gives this slow-rooting tree time to get comfortable, and since it's an evergreen you grow for its shape, there's no harvest to sit around waiting for.
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
Almost every headache with a Hinoki cypress comes down to one of three things: soil that stays too wet, winter wind drying out the foliage, or a cut made into wood that can't grow back. Catch the early signs and you can usually step in before you lose a branch. Find the match below, then act while it still does some good.
Whole tree browning and wilting on a slow slide
If the whole tree keeps browning from the inside while the ground won't dry out, you're most likely looking at root rot, and often it's the Phytophthora kind that loves wet soil. Want to be sure? Scrape away a little dirt and check the roots, because healthy ones stay firm and pale while rotted ones go dark and mushy. Sort out the drainage, back off the watering, and move any survivor to a raised, well-drained spot, since a Hinoki cypress parked in standing water hardly ever comes back.
Fix:
- Improve drainage and stop overwatering
- Remove and destroy severely affected plants
- Replant in a raised or well-drained site with amended soil
Dusty, bronzed foliage with a little fine webbing
When the foliage goes dull and bronze in a hot, dry stretch, you're usually dealing with spider mites. Not sure? Hold a sheet of white paper under a branch, give it a tap, and watch for tiny specks that start crawling around. A good hard blast of water knocks most of them off, horticultural oil or insecticidal soap mops up the rest, and a cypress that's kept well watered just shrugs the whole thing off.
Fix:
- Spray plants forcefully with water to dislodge mites
- Apply horticultural oil or insecticidal soap
- Encourage natural predators by avoiding broad-spectrum insecticides
Little hanging bags and branches looking nibbled thin
Those small cones of silk and clipped foliage swinging off the twigs? Those are bagworms, and there's a hungry larva tucked inside each one. The easy fix is to just pick them off by hand through fall and winter, when they're sitting still and simple to spot. And if you catch the young larvae feeding in late spring, a dose of Bacillus thuringiensis handles them before they thin out a branch.
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 showing up after winter
Brown patches that turn up in late winter, worst on the side that faced the weather, are winter burn, and they look scarier than they are. Sun and wind pulled moisture out of the foliage while the roots were stuck in frozen ground and couldn't top it back up. Tempted to grab the pruners? Hold off, because the buds inside might still be green and alive. Wait for new growth to show you what's really gone, trim just that, and give the tree a deep soak 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 just won't green up
Inner or lower branches that are all brown wood and won't leaf out have been pushed a step too far, usually by a cut or heavy shade reaching into old leafless wood. Here's the thing to remember: a Hinoki cypress just won't resprout from bare wood the way a yew does. So keep your cuts inside the living foliage and let a bit of light down to the lower limbs, and the branches you care about will stay green and full.
Fix:
- Avoid cutting branches back beyond living foliage
- Maintain foliage on all branches you want to keep productive
Toxicity
Good news if you've got animals at home: the Hinoki cypress is not toxic and isn't on the lists of plants that poison cats or dogs. If a pet grabs a sprig, the worst it'll probably get is a quick upset stomach from the fibrous, aromatic foliage. So go ahead and plant it near pets, livestock, and kids without stressing about it.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
If your cat sneaks a nibble, there's really nothing to panic about, since the foliage has no known toxin. The worst you might see from a mouthful of resinous needles is a bit of drooling or a quick tummy upset, and that sorts itself out.
Dogs None
Dogs can hang out near a Hinoki cypress with no problem at all. If one chews a sprig, you're usually just looking at some mild, short-lived stomach upset from the fibrous, aromatic foliage.
Horses Safe
Horses don't have anything to fear here, because the tree isn't toxic to them and there's no record of it poisoning them. Like any tree they wouldn't normally graze on, one that eats a big helping might just get a passing bellyache.
Rabbits Safe
Rabbits are fine around this cypress, with no poisoning risk to speak of. The tough, resinous foliage isn't really their kind of snack, so most take a taste and hop off.
Livestock Safe
Cattle, goats, and sheep can share a paddock with a Hinoki cypress just fine, since there's no toxin in it that'll bother them. And honestly, grazing animals tend to skip the bitter evergreen growth anyway.
Birds Safe
Birds are perfectly safe around the tree, and they'll often shelter and nest in a dense conifer like this. There's nothing in the foliage that would do them any harm.
People Safe
There's no poisoning danger for people, and nobody's eating any part of it anyway. Handling the foliage is fine, though the aromatic oils can bug very sensitive skin, so give your hands a rinse if needed.
As with any plant, nibbling foliage may cause mild stomach upset in pets even though the plant is not considered toxic.
Varieties
Most folks grow a named cultivar instead of the full-size species, and there's a fun range to pick from, all the way from tiny bonsai dwarfs to gold-tinged columns. Here are the ones worth knowing by name.
Nana Gracilis
It's a slow-growing dwarf that's loved for its dense, shell-like sprays of dark green foliage, which is exactly why it's such a hit for rock gardens and bonsai.
Crippsii
It's a golden form, and its pendant sprays glow their brightest yellow when you give it full sun.
Gracilis
It's a compact, slender pyramid of dark green foliage that tops out around 10 to 20 feet (3 to 6 m).
Fernspray Gold
It shows off arching, fern-like golden-yellow sprays on a loose, layered frame.
Kosteri
It's a dwarf, spreading cultivar that stacks up its bright green foliage into flat, horizontal fans.
Tetragona Aurea
It's an irregular dwarf, and its congested, four-sided golden foliage gives it a texture you won't see on the others.
How to propagate
There are a few ways to make more Hinoki cypress, but only cuttings and grafts will get you a faithful copy of a named cultivar. Seed works fine for the species, though it gives you variable seedlings.
Stem cuttingsModerate
Late summer to fall · Several weeks to a few months to root
Cuttings are the go-to for copying a named cultivar, which is handy since an established tree really doesn't like being moved. Take semi-hardwood cuttings from late summer into fall and root them under mist, and they'll settle in over several weeks to a few months.
GraftingDemanding
Late winter · Weeks to months
Nurseries will often graft the fancier cultivars onto seedling rootstock in late winter, and the union knits together over the weeks to months that follow. It's fiddly work, though, so it's best left to growers who've done it before.
SeedModerate
Spring · Weeks to germinate
You can grow the plain species from seed sown in spring, and sprouts show up over a few weeks. Just don't expect the seedlings to match a named cultivar, because they don't come true from seed.
Myths
The Hinoki cypress is a true cypress.
It actually sits in the genus Chamaecyparis, the false cypresses, which are their own thing apart from the true cypress genus Cupressus, even though both are in the Cupressaceae family. Its other common name, Hinoki false cypress, kind of spells it out. So it's a false cypress, not a true one.
You can hard-prune an overgrown Hinoki cypress back into the bare wood to freshen it up.
Unlike a yew, this false cypress won't push new growth out of old leafless wood, so that's a shortcut that backfires. Cut a branch down to bare brown wood and it just dies on you. Keep every cut inside the living, green foliage.