Shrub · Rosaceae
Cotoneaster
Cotoneaster
Effortless and berry-bright through the bleakest months, cotoneaster gives a garden its winter color when little else will.
Full sun
Every 7–14 days
USDA 5–7
2–3 ft · 0.6–0.9 m
Overview
Cotoneaster is a hardy shrub in the rose family with an easy, arching presence and small leaves that read as fine texture across a planting, and its red berries keep the show going long after other plants have given theirs up. The forms run from flat groundcovers that finish a slope to upright shrubs that stand taller than a person, so there is one to set the tone in almost any corner. Late spring brings small white-to-pink flowers, and the bees give a border a quiet hum.
Its real appeal is how lightly it sits in a garden's routine. It takes poor, rocky, and dry soil in stride, holds through cold down to -20°F (-29°C), and once settled it asks almost nothing in the way of watering. That ease makes it a natural for banks, hedges, and the awkward spots where a more demanding plant would only look unhappy.
It comes with two things worth planning around. Cotoneaster is very prone to fire blight, and with birds carrying the berries about, a few species have slipped beyond the garden in mild regions. Design with both in mind and the plant returns years of easy seasonal color.
Care
The short version: set it in full sun to part shade on any soil that drains, see it through its first season with steady water, and from then on let a light annual trim keep the look you want.
Light
Cotoneaster looks its best in full sun, where flowers and fruit come on most generously and the winter berry display reads at its fullest, though it will settle for partial shade and partial sun. The brighter the spot, the richer the show it gives a scene.
Water
Keep it watered through that first growing season so the roots take hold and the plant earns its keep. After that it is genuinely drought tolerant and folds into a low-effort routine. The one setting it cannot abide is wet, poorly drained ground.
Soil
Almost any well-drained soil will do, and it makes a graceful job of clay, sand, and the poor or rocky ground that defeats fussier plants. Aim for a pH between 6.0 and 7.5. Drainage is the thing that matters, far more than how rich the bed is, since standing wet is its undoing.
Temperature
This is a cold-hardy shrub at home anywhere from about -20°F to 100°F (-29°C to 38°C). That breadth lets it carry a garden across a wide span of climates, which is part of why it turns up in so many.
Humidity
Ordinary outdoor air is all it asks, so there is no humidity figure to manage. What does count for the look of a planting is good airflow, since close, still corners invite fire blight and other leaf troubles that spoil the display.
Feeding
These are easygoing shrubs that usually want little to no feeding in average soil, which keeps them off the maintenance list. If a plant looks tired, a balanced general-purpose fertilizer in early spring sets it right. Keep it light, because soft, lush growth is exactly what fire blight favors.
Pruning
Cotoneaster asks for only minimal pruning, an easy fit for a hands-off garden. Shape it after flowering or in late winter, lift out dead or crossing branches, and keep its spread to the lines you want. Cut away any fire-blighted wood the moment it shows, disinfecting tools between cuts.
Repotting
Cotoneaster is rarely repotted, since most plants live out their days in the open ground where they belong. For a containerized shrub on a terrace or by a door, move up a size when you notice roots circling or escaping the drainage holes, water running straight through, or growth easing off.
Size & spacing
Scale depends on the form, but this one settles at about 2 to 3 feet (61 to 91 cm) tall and reaches a generous 6 to 8 feet (183 to 244 cm) across. Plan the spacing for that sprawl, because crowding cuts the airflow and undermines both the planting's health and its look.
When to plant
Cotoneaster belongs to the slow, settled side of a garden, planted once and kept for years rather than timed to a season. Put new plants in during spring or fall while the soil works easily, then count on flowers in late spring and the red berries from late summer, carrying the scene through fall and into winter.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: spring or fall
- Harvest: Flowers in late spring; red berries ripen in late summer and persist into fall and winter
Hardiness
USDA hardiness zones: 5–7
Temperature: down to -29°C
Troubleshooting
For all its easy charm, cotoneaster has a few off days, and one of them can spoil a planting fast if it goes unwatched. The early signs gather on the new shoots and the foliage, so let that be where the eye lands first. Set what you see against the cases below and step in early, especially when blight is on the cards.
Shoot tips turn black and curl over in a hook
This is fire blight, a bacterial disease cotoneaster takes on all too readily, and it kills new growth from the tip down and can mar a whole planting. The blackened shoots curl into a hook and may ooze. Cut well below the damage into clean wood, wipe tools between cuts, and burn or bin the prunings rather than composting them.
Fix:
- Prune out infected branches well below visible damage (at least 20-30 cm into healthy wood)
- Disinfect pruning tools between every cut
- Remove and destroy all infected prunings; do not compost
- Avoid heavy nitrogen fertilizing, which encourages susceptible succulent growth
Leaves turn speckled and bronzed with dark specks beneath
Two pests dull the foliage this way. Lace bugs leave shiny black droppings on the leaf undersides, while spider mites arrive in hot, dry spells and spin fine webbing. A firm hose-down knocks the mites back, then a treatment of insecticidal soap or horticultural oil on the undersides, repeated if they return, restores the planting.
Fix:
- Hose down foliage to dislodge mites
- Apply insecticidal soap or horticultural oil to affected foliage, especially leaf undersides
- Repeat applications as needed during the season
Leaves bound in silk and chewed back to the veins
The culprit is the cotoneaster webworm, whose caterpillars feed out of sight inside the silk they spin among the branches. Snip out and destroy the webbed tips as soon as they catch the eye. While the larvae are still small, a treatment of Bacillus thuringiensis or another suitable insecticide brings them to heel.
Fix:
- Prune out and destroy webbed branch tips
- Apply Bacillus thuringiensis (Bt) or an appropriate insecticide while larvae are small
Toxicity
However handsome the display, cotoneaster is a plant to keep off the table. Every part, from the foliage to the berries that carry the season, holds cyanogenic glycosides that release small amounts of cyanide. A single stray berry rarely amounts to more than mild stomach upset, but a real helping can turn serious, so keep dropped fruit cleared and steer pets, livestock, and young children away.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Caution
For cats, a nibbled berry or leaf usually brings on drooling and a bout of vomiting. Keep watch for a big mouthful, since a large helping can edge into cyanide territory with weakness and labored breathing.
Dogs Caution
Most dogs that grab a few berries come away with an upset stomach and some vomiting. The worry begins when one eats a large quantity, which can trigger the same cyanide effects and warrants a call to the vet.
Horses Toxic
Horses graze in bulk, and that leaves them more vulnerable here. Enough leaves or berries can release dangerous cyanide, showing as rapid breathing, staggering, and collapse, so keep them clear of the shrub.
Rabbits Toxic
The cyanogenic compounds in the foliage and berries make cotoneaster a poor and risky choice for a rabbit. Offer no part of it, and fence it off where rabbits roam.
Livestock Toxic
Sheep, goats, and cattle can graze enough foliage or fruit for the cyanide to build to a harmful dose. Gasping, sudden distress, and weakness are the warning signs, and the shrub has no place along a pasture edge or anywhere a herd browses.
Birds Caution
Garden birds feast on the ripened fruit and carry the seed onward, none the worse for it, yet a companion bird in the home is a different matter, small and delicate. Even a modest taste can overwhelm one, so this is a shrub to keep well apart from an aviary or cage.
People Caution
No part of cotoneaster is food, and the berries only look inviting. A stray berry or two tends to cause mild stomach upset at most, but eating a real quantity can bring on cyanide symptoms, so keep the fruit away from young children.
Keep fallen berries picked up and discourage pets and children from eating berries or chewing foliage.
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
Cotoneaster suits a great many settings, from low mats that finish a slope to tall, arching shrubs that anchor a border. These are the forms you are most likely to design around.
Cotoneaster horizontalis (Rockspray Cotoneaster)
A low spreader that settles around 2 to 3 feet tall yet runs 6 to 8 feet wide, laying its branches in the flat fishbone pattern that gives it both its name and its tidy, ground-finishing look.
Cotoneaster franchetii (Orange/Gray Cotoneaster)
An upright, mostly evergreen shrub that climbs to 6 to 10 feet with orange-red berries, well suited to anchoring a border, though it tends to slip beyond the garden in mild-winter regions.
Cotoneaster salicifolius (Willowleaf Cotoneaster)
A larger, arching shrub that brings movement to a planting with its long, narrow willow-like leaves and the heavy clusters of red berries it carries.
Cotoneaster dammeri (Bearberry Cotoneaster)
A flat-growing evergreen that roots as it creeps along the ground, an elegant solution for clothing slopes and holding soil where a finished, settled look is wanted.
How to propagate
Three easy routes lead to more cotoneaster, and one asks nothing of you at all. Choose by how soon you want the plant in place and how much of the work you care to do yourself.
Stem cuttingsModerate
Summer · Several weeks to root; one or more seasons to establish
Take semi-hardwood cuttings in summer and root them somewhere warm and humid. They strike roots over several weeks, but plan on a season or more before a young plant is settled enough to take its place in the scheme.
SeedModerate
Fall · One or more seasons; seed needs stratification and germination is slow
Birds see to most of this on their own, eating the berries and scattering the seed far and wide. To do it by design, sow in fall and give the seed a cold spell, since stratification is what breaks its dormancy. Patience is the price, because germination is slow and a seedling needs a season or more to find its place.
LayeringEasy
Spring to summer · One season or more to root where stems touch the soil
This is the unhurried route. The low, spreading branches root by themselves wherever they rest on moist soil, so from spring through summer you can pin a stem down and let it take hold over a season or more before cutting it free to stand on its own.
Myths
The fruit of cotoneaster is so poisonous that a pet swallowing even one berry comes to serious harm.
In truth the berries are only mildly toxic. A cat or dog that takes a few usually ends up with nothing worse than a sour stomach, and it takes a real mouthful before the cyanide compounds climb to a dangerous level. The risk lies in the quantity, not in one berry.
Cotoneaster suffers no pests or diseases, which means real trouble simply never finds it.
Its easy name is well earned, but it is not untouchable. Cotoneaster is very prone to fire blight, and lace bugs, webworm, spider mites, leaf spot, and canker can each take a turn on it.