Tree · Moraceae
Osage Orange
Maclura pomifera
Plant it once and let it rip. The Osage orange is just about indestructible, thorns, hedge apples, and all.
Full sun
Every 7–21 days
2555–3650 days
USDA 4–9
Overview
The Osage orange is the tree that fenced the whole prairie, and it still has serious character. Before barbed wire showed up, farmers packed the seedlings into tight rows and clipped them into a living wall that stood, in the old saying, horse-high, bull-strong, and hog-tight. It runs in the mulberry family, and those same stout thorns that armored the fence still guard its lower branches today.
Now it is the fruit that steals the show. Every fall the female trees hurl down heavy, yellow-green, brain-textured globes the size of a grapefruit, the legendary hedge apples. They are no orange and not worth a bite, but step on one just once and it sticks in your memory. The tiny green flowers behind them slip by almost unseen in early summer.
Grow this one and it barely asks a thing. It powers through drought, poor ground, clay, salt, and brutal cold without flinching, races upward fast, and lays down some of the most rot-resistant wood in North America. The catch is the thorns and the fruit litter, which is why most planted trees are thornless, fruitless male cultivars.
Care
The short version: hand it full sun and almost any soil, keep it watered while it is young, then turn it loose. Once its roots dig in, this is a tree that positively thrives on being left alone.
Light
Hand it full sun and it repays you with the best shape and the densest growth. It will get by in partial sun or light shade, but a tree out in the open fills in fuller and, funnily enough, loads its sunlit branches with the worst of the thorns.
Water
Water young trees hard while they root, then back way off. Once established it is deeply drought tolerant and shrugs off dry and wet ground alike, so a long gap between waterings, anywhere from a week to three, is no sweat.
Soil
This is where it flexes. It takes poor, dry, clay, sandy, shallow rocky, and even alkaline ground, cruising through a pH from 6.0 to 8.5, though it really rockets on rich, moist, well-drained bottomland.
Temperature
Cold and heat barely make it blink. The tree tears through winters down to about -29°F (-34°C) and summers near 100°F (38°C), which is a big slice of why it stays so reliable across the middle of the country.
Humidity
Plain outdoor air is all it wants, no number to chase. It thrives across a huge sweep of climates without a care for how moist the air runs.
Feeding
It rarely wants feeding, so skip the fertilizer with a clear conscience. Only reach for it if growth clearly stalls, and even then a single balanced slow-release feed in spring does the trick.
Pruning
Prune from late winter into the dormant season to yank out dead, crossing, or low thorny limbs and to shape the crown. Wear gloves and eye protection every time, because the thorns are stout and the latex sap bites.
Repotting
It rarely lingers in a pot for long, so do not fuss over repotting. Bump a nursery seedling up once roots start circling, escaping the container, or shoving water straight through, and get it in the ground before it stalls.
Size & spacing
Brace for a big tree, 30 to 60 feet (9 to 18 m) tall with an even wider spread of 35 to 50 feet (11 to 15 m). Hand it wide-open room well clear of buildings, walks, and overhead lines.
When to plant
Osage orange is a slow burn that pays off for a lifetime. Kick seed off in late winter after a soak or a chill, plant young trees out in spring once frost clears, and keep watch for the small greenish flowers in June and the heavy fruit that piles onto female trees through September and October.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Late winter, after soaking seed 48 hours or cold-stratifying about 30 days.
- Plant: Spring after the last frost, or fall in mild areas.
- Harvest: Insignificant greenish flowers late spring to early summer (June); fruit ripens September to October on female trees.
Hardiness
USDA hardiness zones: 4–9
Temperature: down to -34°C
Troubleshooting
This tree hardly ever falls ill, so the action is all in the challenges it throws at you rather than any disease it fights. Thorns, dropping fruit, and the irritating sap cover nearly every complaint. Zero in on what you are facing below and knock it out before it turns into a headache.
Fierce thorns tearing fabric and skin during close pruning
Those sun-lit branches bristle with stout woody thorns up to 1 inch (2.5 cm) long riding in the leaf axils, and they will grab clothes and skin the second you lean in. Gear up with heavy gloves, eye protection, and thick sleeves before you tackle any pruning, and strip out the low thorny branches to cut down the snags. For a high-traffic corner, plant a thornless male cultivar and dodge the problem outright.
Fix:
- Wear heavy gloves, eye protection, and thick clothing when pruning
- Prune off low thorny branches to reduce contact
- Use thornless male cultivars in high-traffic areas
Stinging, itchy patches on hands after a session with the tree
Break a stem, cut a fruit, or bruise a leaf and out weeps the milky latex sap, and that sap is what turns skin red and itchy. Scrub the spot with soap and water and it clears fast, just keep clean hands away from your eyes until you are done. Pull on long sleeves and gloves before you dive in and the sap never touches you at all.
Fix:
- Wash the area with soap and water
- Wear gloves and long sleeves when handling the plant or fruit
- Avoid touching the eyes or face until hands are washed
Dozens of hefty hedge apples blanketing the ground each fall
When fall lands, mature female trees fling down dozens of hard, grapefruit-sized fruits that stack up under the canopy and turn into a real slip and impact hazard. Grab a rake and clear them as they drop, and plant female trees well back from walks, drives, and parking. Want to skip the whole harvest of hedge apples? Reach for a fruitless male cultivar and never look back.
Fix:
- Rake and remove fallen fruit promptly
- Site female trees away from walkways, drives, and parking
- Plant male (fruitless) cultivars where litter is a concern
Toxicity
Not much to sweat here. Osage orange stays off the ASPCA's toxic lists, and the bitter hedge apple, big reputation and all, will not poison a pet, a person, or livestock. The one real caution is the milky sap, which can redden and irritate skin or a chewed mouth, plus a whole fruit large enough to choke a grazing animal.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats Safe
No poison in sight, so a cat that swats a fruit across the yard shrugs it off. Just keep an eye on the milky sap, which can leave a chewed mouth or paw a little raw.
Dogs Safe
Dogs get nothing toxic from this tree, none at all. The tough, fibrous fruit is the catch, since a whole one swallowed by a small dog could lodge as a blockage, and the sap may sting a mouth that gnaws away at it.
Horses Safe
Feeding studies waved the fruit through with a clean bill, and the horse apple nickname aside, it does horses no harm. Watch instead for a whole fruit jamming the throat, because choking, not poison, is the thing to catch.
Rabbits Safe
Rabbits stay safe here, with zero toxins in the leaves or fruit. The sticky sap can still nettle a tender mouth, so leave it off the menu.
Livestock Safe
Those old tales of hedge apples killing cattle? Researchers tested them and knocked them flat. The fruit poisons nothing, but a whole one can choke a cow that bolts it, and the latex may irritate the mouth.
Birds Safe
Birds meet no poison in this tree at all. Most breeze right past the dense, hard fruit anyway.
People Safe
Nothing on this tree will poison you, and nobody puts the bitter fruit on a plate. Just mind the milky sap when you cut or handle it, since it can redden and irritate skin or the mouth on contact.
The milky latex sap can cause mild contact dermatitis in some people; wear gloves when pruning or handling fruit. Watch for sharp thorns.
Varieties
Most trees you will find sold for yards are named male clones, bred to ditch the thorns and skip the fruit. These are the ones to chase down.
White Shield
A male selection that sets no fruit and lands among the most nearly thornless cultivars going, which makes it the go-to pick for a clean, easy yard.
Wichita
A male, thornless, fruitless tree that growers plant as a clean shade tree to grab all the toughness and none of the litter or thorns.
Park
Another male, thornless, fruitless clone picked for landscapes where dropped fruit would only get in the way.
How to propagate
Almost no tree is this fun to multiply. Osage orange springs from seed, cuttings, and root pieces with barely any fuss, though cloning a named thornless male means rolling up your sleeves for grafting.
SeedEasy
Sow in spring after soaking seed in water about 48 hours or cold-stratifying 30 days; historically sown to grow dense hedgerow living fences. · 1-2 growing seasons to a transplantable seedling
Pry the seeds out of the soft fall fruit, then soak them 48 hours or chill them a month or so before you sow in spring. Hand them full light and bare mineral soil and they leap up, the very trick settlers used to raise whole living fences. Count on one to two seasons before a seedling is beefy enough to move.
Stem cuttingsModerate
Take softwood or greenwood cuttings in summer, or hardwood/dormant cuttings in winter. · One growing season to root
Snip soft greenwood cuttings in summer, or take hardwood cuttings while the tree naps through winter. That dormant winter wood roots with real gusto and usually digs in over a single growing season, and here is the fun part, pull cuttings from the upper, thornless growth and the new plants shoot up thornless too.
DivisionModerate
Lift and separate root cuttings or root suckers in the dormant season. · One growing season
This tree flings up suckers and roots like a champ from bits of root, so lift and split them while it dozes in dormancy. A separated root cutting or sucker grabs hold in about one growing season, so the payoff comes quick.
GraftingDemanding
Chip-bud or graft thornless male clones onto seedling rootstock in the growing season. · 1-2 seasons
Grafting is the tough climb, but it is the one sure way to clone a named thornless, fruitless male true to type. Chip-bud or graft the clone onto a seedling rootstock during the growing season, and the union knits over one to two seasons.
Myths
Line the windowsills with hedge apples and spiders will never move in.
It is the story everyone repeats about this tree, and it flat out does not stack up. Iowa State researchers found that compounds pulled from the fruit can repel insects, but only at concentrations way above what the fruit actually packs. Roll whole hedge apples across the floor and the bugs march right on by.
The big green fruits are poisonous to every animal and person.
The fruit tastes bitter and nobody eats it, which is likely how the rumor caught fire, but poison it is not. Feeding experiments shut the book on the old cattle-killing tale for good. The only real danger is a whole fruit choking a grazing animal, never a toxin lurking inside.