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 from the mountain forests of Japan, where the species can reach great age and size. It belongs to the false cypress group, the genus Chamaecyparis, set apart from the true cypresses by its scale-like foliage held in flat, fanning sprays. Run a hand across it and you get the soft, resinous scent that has made the tree's timber prized for centuries.
In the garden you're far more likely to meet one of its many cultivars than the towering wild form. Breeders have pulled dwarfs, golden forms, and twisted, congested shapes out of the species, so the same plant can be a knee-high bonsai or a slender 20-foot column. It earns its keep as a year-round backbone, green through every season and hardy across USDA zones 4 to 8.
This is a patient gardener's tree. It grows slowly and asks for little once settled, but it holds one firm rule: it will not regrow from bare wood, so what you cut away stays gone. Plant it in acidic, well-drained soil, give it sun and shelter, and it rewards the wait with decades of quiet, reliable 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
Hinoki cypress does best in full sun, which keeps its growth dense and brings out the brightest color on the golden cultivars. It will take partial shade, but plants grown in too little light grow open and thin, with the lower branches the first to fade.
Water
Keep the soil evenly moist but never waterlogged, watering roughly every 5 to 10 days and more often through a dry spell. Pay close attention while the tree is establishing, since steady moisture in those first seasons matters most. Soggy ground is the one thing it won't forgive.
Soil
Plant in fertile, acidic, well-drained loam with a pH between 5.0 and 6.5. Good drainage is non-negotiable, because the roots rot in standing water, so heavy clay should be lightened with organic matter or the tree set on a raised spot.
Temperature
The tree is tough across a wide range, hardy from about -29°F to 100°F (-34°C to 38°C) and comfortable through USDA zones 4 to 8. It handles real cold well, though young plants exposed to harsh winter wind can scorch.
Humidity
Ordinary outdoor humidity suits it fine, so there's no target to hit. What matters more is air movement and shelter from drying wind, which in winter can pull moisture from the foliage faster than frozen roots can replace it.
Feeding
Feed 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 holds the soil acidic keeps the foliage a deep, even green.
Pruning
This is a tree that wants little to no pruning beyond clearing out dead or damaged branches. The critical rule is never to cut back into bare old wood, which will not resprout, so every cut has to stay within the living, green foliage.
Repotting
Container and bonsai specimens want fresh soil and root work every 2 to 3 years. Watch for roots circling the pot, creeping out the drainage holes, water running straight through, or growth slowing to a crawl, which all say it's time to repot.
Size & spacing
The full species is a 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 real room. Dwarf cultivars stay a fraction of that, which is why they suit smaller gardens, containers, and bonsai.
When to plant
Set a Hinoki cypress out in spring or early fall, when the soil is workable and the weather is mild enough for the roots to settle before heat or hard frost. Both windows give the slow-rooting tree time to establish, and there's no harvest to wait on with an evergreen grown for its form.
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
Most Hinoki cypress trouble traces back to the soil staying too wet, the wind drying foliage in winter, or a cut made into wood that can't grow back. Read the early signs and you can step in before a branch is lost for good. Match what you see below, then act while it still helps.
Browning, wilting foliage with steady dieback
When a whole plant fades from the inside and the soil stays soggy, the trouble is usually root rot, often driven by Phytophthora in wet ground. Dig a little and you may find dark, soft roots instead of firm white ones. Improve the drainage, stop overwatering, and move any survivor to a raised, well-drained spot, because a Hinoki cypress sitting in standing water rarely recovers.
Fix:
- Improve drainage and stop overwatering
- Remove and destroy severely affected plants
- Replant in a raised or well-drained site with amended soil
Bronzed, stippled foliage laced with fine webbing
Foliage that turns dusty and bronze in hot, dry weather usually points to spider mites. Tap a branch over a sheet of white paper and watch for tiny specks that crawl. Blast the plant with a hard spray of water to knock them loose, follow up with horticultural oil or insecticidal soap, and keep the cypress well watered so it can shrug them off.
Fix:
- Spray plants forcefully with water to dislodge mites
- Apply horticultural oil or insecticidal soap
- Encourage natural predators by avoiding broad-spectrum insecticides
Spindle-shaped bags dangling from thinning branches
Those small cones of silk and clipped foliage hanging off the twigs are bagworms, and each one shelters a hungry larva. Pick them off by hand through fall and winter while they are easy to spot. If you catch the young larvae feeding in late spring, an application of Bacillus thuringiensis clears them before they strip 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 in late winter
Browning that appears in late winter and concentrates on the windward side is winter burn, the result of sun and wind drying out foliage while the roots are locked in frozen ground. Don't reach for the pruners yet, since the buds inside may still be green and alive. Wait for new growth to show the real damage, then cut only what stays dead, and water deeply each fall before the soil 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 brown branches that never green up again
Interior or lower branches that hold only brown wood and refuse to leaf out have been pushed past the point of recovery, usually by cutting or shading into old leafless wood. A Hinoki cypress will not resprout from that bare wood the way a yew does. Keep your cuts within the living foliage and let light reach the lower limbs, and every branch you want to keep stays clothed.
Fix:
- Avoid cutting branches back beyond living foliage
- Maintain foliage on all branches you want to keep productive
Toxicity
Good news for households with animals: the Hinoki cypress is not toxic and isn't listed among the plants that poison cats or dogs. A pet that chews a sprig might get a brief upset stomach from the fibrous, aromatic foliage, nothing worse. You can plant it near pets, livestock, and children without concern.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A curious cat that nibbles the foliage is in no real danger, since the plant carries no known toxin. A mouthful of the resinous needles might bring on a little drooling or a brief upset stomach, and that passes on its own.
Dogs None
Dogs can be around a Hinoki cypress without worry. The worst a chewed sprig usually causes is mild, short-lived stomach upset from the fibrous, aromatic foliage.
Horses Safe
The plant is not toxic to horses and isn't known to cause poisoning. As with any tree they shouldn't normally graze, a horse that strips a lot of foliage might get a passing bellyache.
Rabbits Safe
Rabbits face no poisoning risk from this cypress. The tough, resinous foliage isn't a natural food for them, so most will leave it alone after a taste.
Livestock Safe
Cattle, goats, and sheep can share a paddock with a Hinoki cypress safely, as it carries no toxin that affects them. Grazing animals tend to ignore the bitter evergreen growth anyway.
Birds Safe
Birds are safe around the tree, which often shelters and nests in dense conifers like this one. There's nothing in the foliage that would harm them.
People Safe
The plant poses no poisoning danger to people, and no part of it is eaten. Handling the foliage is fine, though the aromatic oils may bother very sensitive skin.
As with any plant, nibbling foliage may cause mild stomach upset in pets even though the plant is not considered toxic.
Varieties
Most gardens grow a named cultivar rather than the full-size species, and the choices range from tiny bonsai dwarfs to gold-tinged columns. These are the ones worth knowing by name.
Nana Gracilis
A slow-growing dwarf prized for its dense, shell-like sprays of dark green foliage, which makes it a favorite for rock gardens and bonsai.
Crippsii
A golden form whose pendant sprays glow brightest yellow when it's grown in full sun.
Gracilis
A compact, slender pyramid of dark green foliage that reaches about 10 to 20 feet (3 to 6 m).
Fernspray Gold
It carries arching, fern-like golden-yellow sprays on a loose, layered frame.
Kosteri
A dwarf, spreading cultivar that builds up bright green foliage in flat, horizontal fans.
Tetragona Aurea
An irregular dwarf with congested, four-sided golden foliage that gives it an unusual texture.
How to propagate
Hinoki cypress is multiplied a few different ways, though only cuttings and grafts will hand you a faithful copy of a named cultivar. Seed works for the species but throws variable seedlings.
Stem cuttingsModerate
Late summer to fall · Several weeks to a few months to root
Cuttings are the usual way to multiply named cultivars, since the plant is hard to move once established. Take semi-hardwood cuttings from late summer into fall and root them under mist, where they settle in over several weeks to a few months.
GraftingDemanding
Late winter · Weeks to months
Nurseries sometimes graft the choicer cultivars onto seedling rootstock in late winter, and the union knits over the following weeks to months. It's exacting work, so it's better left to growers with practice.
SeedModerate
Spring · Weeks to germinate
You can raise the straight species from seed sown in spring, with sprouts appearing over a few weeks. Just know the seedlings won't match a named cultivar, since they don't come true.
Myths
Hinoki cypress is a true cypress.
It belongs to the genus Chamaecyparis, the false cypresses, which sit apart from the true cypress genus Cupressus even though both share the Cupressaceae family. Its other common name, Hinoki false cypress, says as much. The plant 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 will not push fresh growth from old leafless wood. Cut a branch back to bare brown wood and that branch simply dies. Keep every cut inside the living, green foliage.