Tree · Cupressaceae
Hinoki Cypress
Chamaecyparis obtusa
Give it acidic soil, steady moisture, and a spot out of harsh wind, and this forgiving slow evergreen will hold 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 an easygoing, slow-growing evergreen from the mountain forests of Japan, where the wild trees live to a great age and size. Don't let the pedigree intimidate you; it belongs to the false cypress group, the genus Chamaecyparis, set apart from the true cypresses by its scale-like foliage that lies in flat, fanning sprays. Brush a hand over it and you'll be greeted by the soft, resinous scent that has made its timber treasured for centuries.
In most gardens you'll meet one of its many cultivars long before you meet the towering wild form, and that variety is part of the fun. Growers have coaxed dwarfs, golden forms, and twisted, congested shapes from the species, so the very same plant can be a knee-high bonsai or a graceful 20-foot column. It makes a dependable, year-round backbone, green through every season and hardy across USDA zones 4 to 8.
This is a tree that rewards patience, which is good news if you're just starting out. It grows slowly and needs little once it settles, and it asks you to remember only one thing: it won't regrow from bare wood, so cut with care and you'll be fine. Give it acidic, well-drained soil, some sun and shelter, and it repays you with decades of quiet, steady structure you can count on.
Care
The short version: full sun to part shade in moist, acidic, well-drained soil, kept evenly watered but never soggy, with only light pruning and a little shelter from drying winter wind, and you're set.
Light
Your Hinoki cypress will be happiest in full sun, which keeps its growth dense and draws out the brightest color on the golden cultivars. It'll accept partial shade too, so don't panic over a slightly shady corner, but in too little light it grows open and thin, and the lower branches are the first to lose their fullness.
Water
Aim to keep the soil evenly moist but never waterlogged, watering about every 5 to 10 days and a little more often through a dry spell. Give it extra attention while it's establishing, since steady moisture in those first seasons is what it wants most. Soggy ground is the one mistake it truly won't forgive, so err toward well-drained.
Soil
Set it in fertile, acidic, well-drained loam with a pH between 5.0 and 6.5, and you're off to a strong start. Good drainage really is the key, because roots left in standing water will rot, so lighten heavy clay with organic matter or plant the tree on a gentle raised spot.
Temperature
This is a genuinely tough tree, hardy from about -29°F to 100°F (-34°C to 38°C) and content through USDA zones 4 to 8. It shrugs off real cold with ease, though a young plant caught in harsh winter wind can scorch, which is easy to guard against with a little shelter.
Humidity
Ordinary outdoor humidity suits it just fine, so there's no number you need to chase. What matters far more is gentle air movement and shelter from drying wind, which in winter can draw moisture from 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. A single 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
Happily, this is a tree that wants little to no pruning, beyond tidying away any dead or damaged branches. The one rule to hold onto is never to cut back into bare old wood, which won't resprout, so keep every cut within the living, green foliage and you can't go wrong.
Repotting
Container and bonsai specimens appreciate fresh soil and a little root work every 2 to 3 years. Keep an eye out for roots circling the pot, poking through the drainage holes, water running straight through, or growth slowing to a crawl, and any of those is a friendly signal that it's time to repot.
Size & spacing
The full species is a true forest giant, reaching 50 to 75 feet (15 to 23 m) tall with a spread of 15 to 25 feet (4.6 to 7.6 m), so give a landscape specimen plenty of elbow room. Dwarf cultivars stay a small fraction of that, which is exactly why they're such a gift for smaller gardens, containers, and bonsai.
When to plant
Plant a Hinoki cypress in spring or early fall, when the soil is easy to work and the weather is mild enough for the roots to settle before summer heat or hard frost arrives. Either window gives this slow-rooting tree the time it needs to get comfortable, and since it's an evergreen grown for its shape, there's no harvest to wait on and no rush.
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 Hinoki cypress worry comes back to one of three things: soil that stays too wet, winter wind drying the foliage, or a cut made into wood that can't regrow. Spot the early signs and you can usually step in before any branch is lost. Find the match below, take heart, and act while it still makes a difference.
Foliage browning and wilting as the plant slowly slips
If the whole tree keeps fading from the inside while the ground stays wet, take a breath, because the likely cause is root rot, often the Phytophthora kind that thrives in soggy soil. Gently scrape away a bit of earth and look at the roots; healthy ones are firm and pale, while rotten ones feel dark and soft. You can still help by drying out the drainage, easing off the water, and lifting any survivor onto a raised, free-draining spot where its roots can breathe again.
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 hint of fine webbing
When foliage goes dull and bronze in a stretch of hot, dry weather, the small culprit is almost always spider mites, and they are easy enough to catch early. Hold a sheet of white paper under a branch, give it a tap, and watch for tiny specks that start to move. A firm blast of water knocks most of them off, a follow-up of horticultural oil or insecticidal soap handles the rest, and keeping your cypress well watered helps it bounce right back.
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 that look nibbled thin
Those tidy little cones of silk and clipped foliage swinging from the twigs are bagworms, and each one is home to a caterpillar doing the chewing. The good news is you can simply pick them off by hand through fall and winter, when they sit still and show up clearly. And if you spot the young larvae feeding in late spring, a dose of Bacillus thuringiensis takes care of them long 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, browned foliage turning up after a hard winter
Brown patches that show up in late winter, worst on the side that faced the weather, are winter burn, and they are far less dire than they look. Sun and wind pulled moisture from the foliage while the roots were frozen and could not resupply it. Please hold off on the pruners, because the buds tucked inside may still be green and full of life. Wait until new growth shows you what is truly gone, trim only that, and water deeply each fall before the ground freezes so it heads into winter well supplied.
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 leaf out again
Inner or lower branches carrying nothing but brown wood, refusing to green up, have been pushed a step too far, usually by a cut or heavy shade reaching into old leafless wood. It helps to know this isn't your fault to fix afterward: a Hinoki cypress simply won't resprout from bare wood the way a yew can. Going forward, keep your cuts inside the living foliage and let light reach the lower limbs, and the branches you want to keep will stay green and full.
Fix:
- Avoid cutting branches back beyond living foliage
- Maintain foliage on all branches you want to keep productive
Toxicity
Here's some reassurance if you share your home with animals: the Hinoki cypress is not toxic and isn't among the plants known to poison cats or dogs. A pet that grabs a sprig might get a brief upset stomach from the fibrous, aromatic foliage, and that's about the extent of it. You can plant it around pets, livestock, and children with a clear mind.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
You can relax if your cat has a nibble, because the foliage carries no known toxin to worry about. At worst a mouthful of the resinous needles brings a little drooling or a passing tummy upset, and that eases off on its own.
Dogs None
Your dog can share the garden with a Hinoki cypress and be perfectly fine. If a curious pup chews a sprig, the most you'll likely see is a mild, short-lived stomach upset from the fibrous, aromatic foliage.
Horses Safe
There's no need to worry about horses here, since the tree isn't toxic to them and hasn't been tied to poisoning. As with any tree they wouldn't normally graze, one that strips a big mouthful might get a passing bellyache.
Rabbits Safe
Rabbits are safe around this cypress with no poisoning risk to fret over. The tough, resinous foliage isn't a natural snack for them, so most take one taste and happily wander off.
Livestock Safe
You can keep cattle, goats, and sheep in a paddock with a Hinoki cypress and rest easy, as it carries no toxin that troubles them. Grazing animals usually pass over the bitter evergreen growth anyway.
Birds Safe
Birds are welcome and safe around the tree, and they often find shelter and nesting cover in dense conifers like this one. Nothing in the foliage would do them any harm.
People Safe
There's no poisoning danger to people, and no part of the tree is eaten. Handling the foliage is fine, though the aromatic oils might bother very sensitive skin, so a rinse afterward keeps things comfortable.
As with any plant, nibbling foliage may cause mild stomach upset in pets even though the plant is not considered toxic.
Varieties
Most of us grow a named cultivar rather than the full-size species, and the choices are a delight, from tiny bonsai dwarfs to gold-tinged columns. Here are the ones worth getting to know by name.
Nana Gracilis
A gentle, slow-growing dwarf loved for its dense, shell-like sprays of dark green foliage, which makes it a welcome pick for rock gardens and bonsai.
Crippsii
A golden form whose pendant sprays reach their warmest, brightest yellow when you grow it in full sun.
Gracilis
A tidy, slender pyramid of dark green foliage that settles in at about 10 to 20 feet (3 to 6 m).
Fernspray Gold
It carries soft, arching, fern-like golden-yellow sprays on a relaxed, layered frame.
Kosteri
A dwarf, spreading cultivar that gathers its bright green foliage into flat, horizontal fans.
Tetragona Aurea
An irregular dwarf whose congested, four-sided golden foliage gives it a charming, unusual texture.
How to propagate
There are a few gentle ways to make more Hinoki cypress, though only cuttings and grafts will give you a faithful copy of a named cultivar. Seed works nicely for the species, but it hands you variable seedlings rather than a match.
Stem cuttingsModerate
Late summer to fall · Several weeks to a few months to root
Cuttings are the friendliest way to copy a named cultivar, which matters because an established tree resents being moved. Take semi-hardwood cuttings from late summer into fall and root them under mist, and they'll ease into rooting over several weeks to a few months while you wait patiently.
GraftingDemanding
Late winter · Weeks to months
Nurseries often graft the choicer cultivars onto seedling rootstock in late winter, and the union slowly knits together over the following weeks to months. It's fussy, careful work, so don't feel you need to tackle it yourself; it's best left to growers with plenty of practice.
SeedModerate
Spring · Weeks to germinate
You can happily raise the plain species from seed sown in spring, with little sprouts arriving over a few weeks. Just keep in mind the seedlings won't match a named cultivar, since they don't come true from seed.
Myths
The Hinoki cypress is a true cypress.
It really sits in the genus Chamaecyparis, the false cypresses, which stand apart from the true cypress genus Cupressus even though both belong to the Cupressaceae family. Its other name, Hinoki false cypress, gives the game away. This tree is 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 send fresh shoots from old leafless wood, so this is one shortcut to skip. Cut a branch back to bare brown wood and that branch just dies. Keep every cut inside the living, green foliage and you'll stay on the safe side.