Houseplant · Cactaceae
Bunny Ear Cactus
Opuntia microdasys
Give it bright sun and a dry, gritty pot, and the bunny ear cactus all but takes care of itself.
Full sun
Every 14–28 days
50–86°F · 10–30°C
USDA 9–11
Overview
The bunny ear cactus earns its name from the flat, paddle-shaped pads that sprout in pairs and stand up like a rabbit's ears. It hails from the deserts of Mexico and grows slowly into a low, branching clump, reaching maybe 12 to 24 inches (30 to 60 cm) indoors. Mature plants can throw pale yellow flowers in late spring and summer, though that's a bonus rather than the reason most people keep one.
What looks like soft fuzz on the pads is anything but. Each polka-dot tuft is a cluster of glochids, tiny barbed bristles that pull free at the lightest brush and lodge in skin, lips, and eyes. They are a chore to remove, so this is a plant you admire and handle with gloves, never pet.
As a houseplant it asks for very little. Bright light, a sharply draining pot, and long dry spells between waterings keep it healthy, and its biggest enemy by far is kindness in the form of too much water.
Care
The short version: as much direct sun as you can give it, a gritty sharply drained mix, and water only when the soil has dried out completely. Handle it only with gloves or tongs.
Light
Give it as much direct sun as you can, ideally a bright south-facing window. It will get by in bright indirect light, but skimp on the sun and the pads stretch thin and pale instead of staying plump and compact.
Water
This is a desert plant, so let the soil dry out completely, then water deeply until it runs from the drainage holes. That works out to roughly every 2 to 4 weeks in the growing season and far less in winter. Standing moisture is the fastest way to rot it.
Soil
Plant it in a gritty, sharply drained sandy or cactus mix that never holds water around the roots. A pH anywhere from 6.0 to 7.5 suits it fine, and adding extra perlite or coarse sand only helps.
Temperature
It is comfortable between 50°F and 86°F (10°C to 30°C), which covers most homes year-round. Keep it above freezing, since frost will damage the soft pads.
Humidity
Low household humidity is exactly what this desert native wants, so there's no number to hit. If anything, dry air suits it, while still, damp conditions invite rot.
Feeding
Feed monthly through spring and summer with a diluted, low-nitrogen cactus fertilizer. Skip it entirely in fall and winter while the plant rests, since pushing growth then does more harm than good.
Pruning
It barely needs pruning at all. Remove a pad only to shape the plant or to start a new one, and always work with thick gloves and tongs, because the glochids let go at the lightest touch and stick fast in skin.
Repotting
Repot only every 2 to 3 years, in spring, once roots creep from the drainage holes or pads crowd the rim. Use tongs and a collar of folded newspaper to lift it, and refresh the gritty mix while you're at it.
Size & spacing
Indoors it stays a tidy clump, climbing slowly to about 12 to 24 inches (30 to 60 cm) tall and roughly as wide. Its slow pace means one pot holds it for years before it needs more room.
Troubleshooting
Nearly every problem with this cactus traces back to water or light. Read the pads and the soil before you reach for the watering can, since soft pads and dry pads call for opposite fixes. Match what you see below and act early.
Pads going soft, mushy, and brown at the base
This is root and stem rot, and it almost always starts with too much water sitting in dense soil. Once a pad feels squishy you have to act fast: stop watering, lift the plant, and cut every soft section back to firm green tissue with a clean blade. Repot into fresh gritty mix and let it dry out completely before the next drink.
Fix:
- Stop watering immediately
- Remove the plant and cut away rotted tissue with a clean blade
- Repot into fresh gritty cactus mix
- Allow soil to dry fully before watering again
Weak, stretched, pale new growth
Pads that grow long, thin, and lean toward the glass are stretching for light, a problem gardeners call etiolation. Move the plant to your brightest window or to full sun. Step the light up over a week or two rather than all at once, or strong sun can scorch the soft new pads.
Fix:
- Move to the brightest available window or full sun
- Introduce direct sun gradually to avoid scorch
Pads shriveling and going wrinkly
When the soil has been bone dry for too long the pads thin out and crease, a sign of plain underwatering. Give it a deep, thorough soak and let the excess drain away. The pads plump back up within a few days, and you can return to watering only once the mix has dried again.
Fix:
- Water thoroughly and allow to drain
- Resume regular deep watering once soil dries
Toxicity
Good news on the poison front: this cactus carries no toxin, and the ASPCA does not list it as harmful to cats or dogs. The danger is physical instead. Its glochids, the fuzzy-looking tufts of barbed bristles, detach at a touch and embed painfully in skin, mouths, and eyes, so keep it out of reach of pets and children and handle it only with gloves.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats Safe
There's no poison here, so a curious cat won't be sickened by a taste. The catch is the glochids: a swat or a chew loads the paw, lips, and tongue with tiny barbed bristles, and you may see pawing at the mouth or face afterward.
Dogs Safe
Chemically this cactus is harmless to dogs. The real trouble is physical, since a sniff or a bite presses dense barbed glochids into the muzzle and tongue, where they stick fast and are awkward to pull out.
Horses Safe
Nothing in the plant will poison a horse. A grazing nose or mouth can still pick up the fine barbed bristles, so keep it well out of reach.
Rabbits Safe
It holds no toxin that would harm a rabbit. A nibble still risks driving glochids into the lips and mouth, which is reason enough to keep it away.
Livestock Safe
Cattle, goats, and sheep face no chemical danger from this cactus. The barbed bristles are the only hazard, lodging in the mouth and muzzle of any animal that investigates it.
Birds Safe
There's nothing poisonous for a bird to swallow. A pecking beak can still snag the tiny barbs, so a perch or pet bird is better kept clear of the pads.
People Safe
Not poisonous, but never handle it bare-handed. The fuzzy-looking tufts are glochids that detach at a touch and bury themselves in fingers, lips, and eyes, where they are painful and slow to remove, so wear thick gloves or use tongs.
The pads are covered in dense tufts of glochids, tiny barbed bristles that look soft and fuzzy but detach at the slightest contact and lodge painfully in skin, lips, mouth, and eyes. They are difficult to remove. Handle only with thick gloves or tongs and keep away from curious pets and children.
Varieties
Beyond the familiar golden form, a couple of named selections turn up, set apart mostly by the color of their glochids.
Opuntia microdasys var. albispina
Carries white glochid tufts instead of the usual golden yellow, giving the pads a frosted, polka-dot look.
Opuntia microdasys 'Rufida'
Wears reddish-brown glochids and is sometimes split off as its own species, Opuntia rufida.
How to propagate
One of the easiest cacti to multiply, the bunny ear roots from a single pad, so a parent plant can give you copies for free.
Stem cuttingsEasy
Spring to summer during active growth · 2 to 6 weeks to root
A single detached pad roots with almost no fuss, so take cuttings in spring or summer while the plant is growing. Twist or cut a pad off with tongs, let the wound callus over for several days, then stand it in dry gritty mix where it puts down roots in 2 to 6 weeks. Handle every step with gloves or tongs to keep the glochids off your hands.
Myths
It is soft and safe to pet because it looks fuzzy.
Those soft-looking tufts are glochids, clusters of fine barbed bristles that come loose the instant you touch them and bury themselves in skin, lips, and eyes, where they are painful and slow to dig out. Never handle this cactus bare-handed. Reach for thick gloves or a pair of tongs every time.