Shrub · Rosaceae
Cotoneaster
Cotoneaster
Tough as nails and loaded with red berries all winter, cotoneaster pretty much takes care of itself once it's settled.
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, and people grow it for its arching shape, tiny leaves, and the red berries that hang around long after other plants have dropped theirs. Need something flat for a slope or something tall and shrubby? There's a form for it, since they range from low groundcovers to uprights taller than you are. Late spring brings little white-to-pink flowers, and the bees can't get enough of them.
What really wins folks over is how little it asks for. It shrugs off poor, rocky, and dry soil, handles cold all the way down to -20°F (-29°C), and once the roots are in it barely needs a drink. That toughness is why it's the go-to for banks, hedges, and those awkward corners where pickier plants just sulk.
It's not perfect, though. Cotoneaster is really prone to fire blight, and since birds carry the berries off, a few species have wandered out of gardens in mild areas. Know about those two quirks before you plant, and it'll pay you back with years of easy color.
Care
The short version: give it full sun to part shade and any soil that drains, keep it watered through the first season so the roots dig in, and after that just trim it now and then to keep its shape.
Light
Cotoneaster is happiest in full sun, where it flowers and fruits the most, but it'll take partial shade and partial sun without much fuss. Want the best berry show? Give it as much sun as you can.
Water
Water it regularly through that first growing season so the roots get a good grip. After that it's genuinely drought tolerant and barely needs anything extra. The one thing it won't put up with is sitting in wet, poorly drained ground.
Soil
Just about any well-drained soil works, and it's fine with clay, sand, and the poor or rocky stuff that would stop other shrubs cold. Shoot for a pH somewhere between 6.0 and 7.5. Soggy soil is the real troublemaker here, so drainage matters way more than how rich the dirt is.
Temperature
This is one cold-hardy shrub, comfy anywhere from about -20°F to 100°F (-29°C to 38°C). That's a huge range of climates, which is a big reason it pops up in so many gardens.
Humidity
Plain old outdoor air is all it needs, so there's no humidity number to chase. What does help is good airflow, because crowded, stuffy spots are where fire blight and other leaf problems get going.
Feeding
These are tough shrubs that usually need little to no feeding in average soil, so don't sweat it. If the growth looks a bit weak, a balanced general-purpose fertilizer in early spring is plenty. Go easy though, because soft, lush growth is exactly what fire blight loves.
Pruning
Good news: cotoneaster only needs minimal pruning. Tidy it up after flowering or in late winter to shape it, take out anything dead or crossing, and keep its spread in check. And if you spot fire-blighted wood? Cut it out right away, wiping your tools between cuts.
Repotting
Cotoneaster gets repotted rarely, since most of them spend their whole life in the ground. If yours is in a pot, just bump it up a size when you see roots circling or sneaking out the drainage holes, water running straight through, or growth slowing down.
Size & spacing
How big it gets depends on the type, but this one runs about 2 to 3 feet (61 to 91 cm) tall and spreads a good 6 to 8 feet (183 to 244 cm) wide. Give it room to sprawl, because crowding cuts the airflow and that just invites disease.
When to plant
Cotoneaster isn't a crop you race against the calendar; it's more of a plant-it-once-and-keep-it deal. Pop new plants in the ground in spring or fall while the soil's easy to dig, then look forward to flowers in late spring and red berries from late summer on, sticking around 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
Cotoneaster is an easy plant, but a few things can crop up, and one of them moves fast, so it pays to stay aware. Where do the first clues show? On the new shoots and the leaves. Take a look there, match it to the cases below, and jump on anything that smells like blight.
Shoots blacken and curl into a shepherd's crook
What you're looking at is fire blight, a bacterial disease cotoneaster catches all too easily, and it kills new growth from the tip on down. The blackened shoots hook over and can ooze a bit. Cut well below the damage into clean wood, wipe your tools between cuts, and burn or bin the prunings instead of 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 go speckled and bronzed with dark specks on the back
Two pests give you this look. Lace bugs leave shiny black droppings on the leaf undersides, and spider mites turn up in hot, dry spells and spin fine webbing. A good hose-down knocks the mites back, then hit the undersides with insecticidal soap or horticultural oil, and do it again later in the season if they come back.
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 bundled in silk and chewed down to the veins
This one's the cotoneaster webworm, and its caterpillars feed hidden inside the silk they spin among the branches. The moment you see that webbing, snip out and destroy those branch tips. While the larvae are still small, a treatment of Bacillus thuringiensis or another suitable insecticide takes care of them.
Fix:
- Prune out and destroy webbed branch tips
- Apply Bacillus thuringiensis (Bt) or an appropriate insecticide while larvae are small
Toxicity
Here's the thing to know: cotoneaster isn't something you want anyone eating. From the leaves to those bright berries, the whole plant carries cyanogenic glycosides that let off small amounts of cyanide. One stray berry usually just means a mild tummy ache, but a big helping can be a real problem, so sweep up dropped fruit and keep pets, livestock, and little kids away from it.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Caution
For cats, a nibbled berry or leaf usually means some drooling and a round of vomiting. Just keep an eye out for a big mouthful, because a large helping can tip into cyanide territory with weakness and labored breathing.
Dogs Caution
Most dogs that grab a few berries get off with an upset stomach and a bit of vomiting. The trouble starts when one eats a large quantity, which can set off the same cyanide effects and means a call to the vet.
Horses Toxic
Horses graze in bulk, and that's what makes them more vulnerable here. Enough leaves or berries can release dangerous cyanide, showing up as rapid breathing, staggering, and collapse, so keep them well away from the shrub.
Rabbits Toxic
The cyanogenic compounds in the foliage and berries make cotoneaster a poor and risky choice for a rabbit. Don't offer any part of it, and fence it off wherever rabbits like to roam.
Livestock Toxic
Cattle, sheep, and goats can browse enough greenery or fruit to release a harmful dose of cyanide. Watch for sudden distress, gasping, and weakness, and keep the plant out of their pasture and reach.
Birds Caution
Wild birds eat the ripe berries and spread the seed no problem, but caged pet birds are smaller and a lot more sensitive. Keep cotoneaster away from companion birds, because even a little can be too much for them.
People Caution
No part of cotoneaster is food, even if the berries look tempting. A stray berry or two usually causes 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 shows up in all sorts of shapes, from flat little mats to tall, arching shrubs. Here are the ones you'll probably bump into.
Cotoneaster horizontalis (Rockspray Cotoneaster)
A low spreader that only gets about 2 to 3 feet tall but runs 6 to 8 feet wide, laying its branches out in that flat fishbone pattern that's how it got its name.
Cotoneaster franchetii (Orange/Gray Cotoneaster)
An upright, mostly evergreen shrub that hits 6 to 10 feet with orange-red berries, though it's got a habit of slipping out of gardens where the winters stay mild.
Cotoneaster salicifolius (Willowleaf Cotoneaster)
A bigger, arching shrub you'll know right away by 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, which makes it a great pick for covering slopes and holding the soil in place.
How to propagate
Want more cotoneaster? You've got three easy ways to go about it, and one of them happens whether you plan it or not. Just pick whatever fits how soon you want a plant and how much effort you're up for.
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'll strike roots over several weeks, but don't rush it, because a young plant needs a season or more before it's really settled in.
SeedModerate
Fall · One or more seasons; seed needs stratification and germination is slow
Honestly, the birds do most of this for you, eating the berries and dropping the seed all over the place. Want to do it on purpose? Sow in fall and give the seed a cold spell, since that stratification is what wakes it from dormancy. Just be patient, because germination is slow and a seedling needs a season or more to get going.
LayeringEasy
Spring to summer · One season or more to root where stems touch the soil
This is the lazy way, and it works. The low, spreading branches root all by themselves wherever they press against moist soil, so from spring through summer you can just pin a stem down, let it take hold over a season or more, and then snip it free.
Myths
Cotoneaster berries are deadly, and a single one will seriously harm a pet.
Not so fast, because the berries are only mildly toxic. A cat or dog that eats a few usually gets nothing worse than a sour stomach, and it takes a real mouthful before the cyanide compounds get anywhere near dangerous. It's all about the quantity, not the one berry.
Cotoneaster is pest- and disease-free, so it never runs into serious trouble.
It's earned its easy reputation, sure, but bulletproof it is not. Cotoneaster is really prone to fire blight, and lace bugs, webworm, spider mites, leaf spot, and canker can all take a turn on it.