Shrub · Pittosporaceae
Japanese Pittosporum
Pittosporum tobira
An evergreen shrub that powers through sun, shade, drought, and hard shearing and still perfumes the spring like orange blossom.
Full sun
Every 7–14 days
USDA 8–10
8–13 ft · 2.4–4 m
Overview
Japanese pittosporum is a shrub that pays a gardener back fast. It rockets into a dense, rounded evergreen of glossy, leathery leaves, and by late spring it erupts in clouds of small creamy flowers that throw a strong orange-blossom scent across the yard. That perfume is why it goes by mock orange, even though it has zero connection to the true mock orange.
The real thrill is how much it delivers for how little it wants. Settled in, it powers through drought, heat, and salt spray, thrives in full sun or deep shade, and grows in nearly any soil that lets water run off. Clip it into a sharp hedge, let it billow into a soft mound, or drive it upward into a small tree, and it keeps performing.
Turn it loose and it stretches toward 8 to 13 feet (2.4 to 4 m) with a spread that runs wider still, so it earns a starring role as a screen or backdrop. Prefer to keep things compact? The dwarf forms hug low along borders and foundations. The single line not to cross is wet feet, which trips up more pittosporum than every other problem combined.
Care
The short version: it thrives from full sun to shade, wants a deep soak now and then rather than constant watering once established, and grows in any soil that drains well; shear it after flowering and keep those roots out of soggy ground.
Light
Pittosporum shrugs off light worries and takes anything from full sun to full shade. Park it in sun for the heaviest flowering and the densest growth, but even a shady corner keeps it going strong where plenty of other shrubs would fizzle and thin.
Water
Water it deeply but infrequently, and let the top half of the soil dry out between drinks. Once it is established the shrub laughs off drought, and the real trap swings the other way, since soggy, poorly drained soil slams it with fatal root rot in a hurry.
Soil
Nearly any well-drained soil sends it off and running, be it clay, sand, or loam, right across a pH from 6.0 to 7.5. Just nail the drainage, because standing water is the one thing that takes this plant down.
Temperature
It powers through a wide range, from about 10°F to 100°F (-12°C to 38°C), holding its leaves through mild winters and brushing off summer heat.
Humidity
Plain outdoor humidity does the job and there is no number to chase. Good airflow counts for far more, since crowded, damp foliage rolls out the welcome mat for leaf spot and sooty mold.
Feeding
Feed it once in spring with a balanced general-purpose shrub fertilizer and let it run. On high-pH soils, stay alert for micronutrient shortfalls like magnesium, and fix them the moment leaves start yellowing between the veins.
Pruning
Prune the second the spring flowers fade, because next year's blooms set on old growth and a late cut lops them off. It takes hard shearing without flinching, so shape it into a crisp hedge or drive it up into a small tree.
Repotting
Container plants crave a fresh, bigger pot every 2 to 3 years. Repot when roots start circling the surface or shooting out the drainage holes, or when water blasts straight through and growth grinds to a halt.
Size & spacing
Left alone it climbs to 8 to 13 feet (2.4 to 4 m) tall with a spread of 4 to 18 feet (1.2 to 5.5 m), so hand it real room as a screen or hedge. Tight on space? The dwarf cultivars stay a whole lot smaller.
When to plant
Pittosporum is an evergreen built for warmer gardens, hardy roughly in zones 8 to 10. Get new plants into the ground in spring or fall while the weather stays mild, then look forward to those scented flowers bursting out in late spring, around April and May.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: spring or fall in mild climates
- Harvest: late spring (April-May)
Hardiness
USDA hardiness zones: 8–10
Temperature: down to -12°C
Troubleshooting
Pittosporum is a tough customer, so when it stumbles the cause almost always lands on one of two things: pests dripping honeydew, or roots stewing in water. Scan the early signs below, match them to what the plant shows, and pounce before a small snag balloons.
Whole plant slumping and yellowing even with watering
When a pittosporum yellows, wilts, and crashes all at once, chase down root rot in soil that stays too wet. This shrub flat out refuses wet feet, and once the roots go dark and soft, they rarely bounce back. Cut the water fast, sharpen up the drainage, and yank out any plant that has slipped too far to rescue the rest.
Fix:
- Improve drainage and stop overwatering immediately
- Remove and discard severely affected plants, as root rot is often lethal
- Replant healthy stock in a well-drained site where water does not accumulate
Black sooty film spreading over sticky leaves and stems
That black crust is sooty mold, and it is only telling a story, not causing the trouble. Aphids, cottony cushion scale, or mealybugs are feeding higher up and raining down sticky honeydew that the mold latches onto. Hit the insects hard with a full coat of horticultural oil to smother them, and watch the film wash clean away once the feeders are gone.
Fix:
- Spray plants thoroughly with horticultural oil to smother scale, mealybugs, and aphids
- Repeat applications as directed and wash off sooty mold once pests are controlled
- Hose off light aphid populations with a strong stream of water
Spots and blotches breaking out across the leaves
Scattered spots on the leaves flag fungal or bacterial leaf spot, and it pounces when the foliage stays damp and packed tight. Open the plant right up so air rushes through, aim the water low at the base, and pull the worst-marked leaves to clear the field. It stays purely cosmetic, so the shrub keeps charging along underneath.
Fix:
- Improve air circulation by thinning and proper spacing
- Avoid overhead watering and keep foliage dry
- Remove and dispose of badly spotted leaves
Toxicity
Great news to lead with: pittosporum stays off the list of seriously poisonous plants. Still, it is no snack. The leaves, stems, and seeds pack saponins that irritate the gut, so a pet that chews them can wind up drooling and queasy. Nothing on it is grown to eat, so keep it away from curious mouths.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Mild
A cat that chomps the leaves may drool, throw up, or skip a meal for a while. The saponins drive it, and the upset generally clears on its own the moment the plant lands somewhere the cat cannot reach.
Dogs Mild
A dog that chews the foliage or seed pods usually starts drooling with a churned-up stomach. It rarely turns serious, but a big mouthful can hand them a rough day of vomiting.
Horses Caution
A horse rarely goes after it, yet the same saponins can rattle the gut if a bored animal starts browsing the shrub. Keep it clear of paddocks and stay ahead of the problem.
Rabbits Caution
This is no rabbit snack. The saponin-packed leaves can hand a rabbit a sore stomach, so keep it firmly off the menu.
Livestock Caution
Cattle, goats, and sheep mostly stroll right past, but a hungry animal stripping the leaves could pick up the same gut irritation. Fence it off from grazing land and move on.
Birds Caution
Wild birds gobble the sticky seeds without a hitch, though the saponins make the foliage a poor pick for pet birds, so skip offering it.
People Caution
Nothing on the plant is grown to eat, and the saponins can leave you queasy if you swallow leaves or seeds. Keep small children from popping any part into their mouths.
No part of the plant is meant to be eaten; the saponins make even a curious nibble unpleasant, though it is not life-threatening in small amounts.
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
A handful of named forms steal the show over the plain species, mostly variegated leaves and compact dwarfs. These are the ones to grab first.
Variegata
Its gray-green leaves flash an uneven creamy-white edge that brightens the whole plant and pops far more than the plain species.
Wheeler's Dwarf
A tidy mounding dwarf that holds at about 2 to 3 feet (60 to 90 cm), skips nearly all pruning, and packs a punch in low borders and foundation plantings.
Cream de Mint
A dense little cultivar that shows off neat mint-green leaves rimmed in creamy white.
How to propagate
Pittosporum is a blast to multiply, and most growers dive straight for cuttings because they root eagerly and keep a cultivar true.
Stem cuttingsEasy
Mid-July to September · Several weeks to a few months to root
Cuttings are the fun, easy way to churn out more pittosporum. Snip semi-hardwood cuttings from mid-July through September, dunk the ends in rooting hormone, and tuck them into a 50/50 mix of peat and perlite under high humidity. It roots eagerly, so give it several weeks to a few months to grab hold and reward the effort.
SeedModerate
When ripe seed is available · Slow; weeks to germinate and longer to reach planting size
Chasing the species from seed works too, once ripe seed shows up. It is the patient road, taking weeks to germinate and longer still to reach planting size, and seedlings will not hold a named cultivar true the way cuttings faithfully do.
Myths
Japanese pittosporum is the same plant as true mock orange.
Not a chance, because the two only trade a nickname. Pittosporum tobira grabbed the name mock orange when its flowers came out smelling like orange blossom, but it belongs to the family Pittosporaceae and has no relation to the true mock orange, Philadelphus. Two separate shrubs, two separate families, one lucky shared scent.