Houseplant · Apocynaceae
Dischidia
Dischidia nummularia
Hand it bright light, fast-draining roots, and a good long dry-out, and dischidia just keeps trailing for years.
Bright indirect
Every 7–14 days
64–84°F · 18–29°C
USDA 10–12
Overview
Dischidia is a trailing epiphyte from the wet tropics, and instead of growing in soil it clings to tree bark and rock. You'll probably recognize it first by those strands of small, fleshy leaves that spill over the edge of a pot or a piece of mounted bark. It's in the same family as the milkweeds, and just like them it's got a thin milky sap running through its stems.
So what makes it stand out as a houseplant? It's all in how it drinks. Up in the canopy its roots dry out within hours of a rain, so indoors it wants a coarse, airy mix and a real dry-out between waterings. Get that rhythm down and it takes off, sending out long trailing stems that look great in a hanging pot or trained up a mount.
It does ask for a bit more than your typical starter plant, and that's mostly about water and air. Warmth and high humidity keep it looking lush, while soggy roots are the one thing it just won't put up with. Once you've got the watering figured out, everything else is pretty easy.
Care
The short version: bright, indirect light, a coarse epiphyte mix that drains in a hurry, and a full dry-out before you water again. Keep it warm and humid, feed it a little during the growing season, and whatever you do, don't let the roots stay wet.
Light
Dischidia looks its best in bright, indirect light, but it's fine in medium indirect light too, so don't stress about the perfect window. Just keep it away from harsh direct sun, which can scorch the leaves, and if the spot's too dark you'll notice the stems getting leggy.
Water
Let the mix dry out completely before the next watering, which usually works out to every 7 to 14 days. It's an epiphyte built for fast-draining roots, so it handles a dry spell way better than a wet one. Overwatering is the fastest way to lose it, since soggy roots rot quickly, so when you're unsure, just wait.
Soil
Pot it up in a coarse, airy epiphyte or orchid mix of bark and perlite, the kind water runs straight through. Plenty of growers skip the pot completely and mount it on bark instead, which is exactly how it grows out in the wild.
Temperature
Keep it somewhere in the 64°F to 84°F (18°C to 29°C) range, basically comfy indoor warmth. It can't handle cold at all, so keep it clear of chilly windows and drafts.
Humidity
This one loves moisture and does best at 60% to 80%, so a bathroom, a kitchen, or a spot by a humidifier is perfect. Dry indoor air won't finish it off, but it'll leave the leaves looking kind of tired.
Feeding
From spring through summer, while it's actively growing, give it a dilute balanced liquid fertilizer once a month. When the cooler, slower months roll around and it stops pushing out new growth, just ease off.
Pruning
Trim back any leggy or overlong trailing stems and you'll get fuller, bushier growth in return. And whenever you spot a rotted or damaged stem, snip it off to keep the plant healthy.
Repotting
Plan on repotting every 2 to 3 years, or sooner if the roots start crowding the pot, growth slows down, or the old mix breaks apart and stays wet. Just move it into fresh coarse mix and a pot that's only a little bigger.
Size & spacing
Those stems trail anywhere from 2 to 36 inches (5 to 91 cm), and the plant spreads about 2 to 3 feet (61 to 91 cm) wide. Hang it or set it up high so the strands have room to cascade.
Troubleshooting
Here's the thing about dischidia trouble: it almost always comes back to water and air. The roots, leaves, and stems will tip you off early, so if you catch those signs you can step in before it spreads. Find your plant's symptom below, then act while it still makes a difference.
Stems collapse and the base turns soft and mushy
If the base has gone soft, brown, and mushy and the stems are flopping over, that's root rot, and it almost always comes from too much water or a mix that holds moisture. Remember, this is an epiphyte that wants its roots to dry out between drinks, so soggy conditions suffocate them fast. Slide the plant out, cut away every brown, soft root and stem, then repot it into fresh airy mix and only water once it's dried.
Fix:
- Remove the plant and cut away all rotted roots and stems
- Repot into fresh coarse, fast-draining epiphyte mix
- Water only after the medium dries out
Spots appearing on the leaves
Marks like these usually mean leaf spot, which shows up when the air stays too damp or water sits on the leaves. The fix is simple: water at the base, keep the foliage dry, give the plant more air movement, and pull off any badly marked leaves before it spreads.
Fix:
- Water at the base and avoid wetting foliage
- Improve air circulation around the plant
- Remove badly affected leaves
Stems growing long and sparse with gaps between leaves
Long, leggy stems with big gaps? That's just the plant reaching for more light. Move it somewhere brighter with strong indirect light, but keep it out of harsh direct sun that scorches the leaves. A quick trim of the lankiest stems gets you denser, fuller regrowth.
Fix:
- Move to a brighter spot with bright, indirect light
- Avoid harsh direct sun that scorches leaves
- Trim leggy stems to promote denser regrowth
Toxicity
Got pets or little kids? You can breathe easy with this one, because dischidia isn't a real poisoning risk. The milky sap just tastes nasty, so a curious nibble might mean a bit of drool or a slightly upset stomach, and that's about it. Cats, dogs, and small children can all hang around it safely.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Dischidia isn't known to poison cats, so a curious nibble shouldn't do any harm. If a cat chews a lot of any houseplant it might get a mildly upset stomach, but that clears up on its own.
Dogs None
Dogs can share a room with this plant no problem, since there's no toxic compound in it. That said, a dog that swallows a mouthful of stems might drool or bring it back up, just because the leaves are tough.
Horses None
There's nothing in dischidia that's poisonous to horses, and as a small trailing houseplant it's pretty unlikely to ever cross a horse's path anyway.
Rabbits None
Rabbits won't get poisoned by this plant at all. If you keep it out of reach, it's really to save the foliage, not to protect the rabbit.
Livestock None
Grazing animals like cattle, goats, and sheep aren't harmed by dischidia, which lives indoors and stays well out of their reach anyway.
Birds None
Pet birds can perch and forage near a dischidia safely, since there's no toxic part to worry about.
People None
The plant's no poisoning danger to people, kids included. It's grown for looks, not for eating, so there's really no reason to taste it.
Wear gloves when handling, as the milky sap may irritate skin and eyes.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
A few different dischidia pop up in the houseplant world, and each one has its own leaf shape and way of trailing. These are the ones worth knowing by name.
Dischidia nummularia
People call it string of nickels because of the trailing stems strung with rounded, coin-like paired leaves, and in the wild it ranges from southern China through tropical Asia all the way to northern Queensland.
Dischidia ruscifolia
This one goes by million hearts, and it puts out dense trailing stems lined with small heart-shaped leaves.
Dischidia ovata
The watermelon dischidia has oval green leaves striped with silver, and they pick up a pinkish-red tinge when the light's bright.
How to propagate
Want more dischidia? It's easy, and one healthy plant gives you plenty of cuttings to fill new pots or pass along to friends.
Stem cuttingsEasy
Spring or summer during active growth · A few weeks to root
Honestly, stem cuttings are by far the easiest way to make more dischidia. Take them in spring or summer while it's growing, set them in a coarse, moist mix, and they'll root in just a few weeks. After that, each cutting fills out into a trailing plant that's identical to the one you took it from.
Myths
Dischidia are parasites that harm the trees they climb.
Nope, that's not how it works. These plants are epiphytes, and sometimes lithophytes, which just means they sit on tree bark or rock for support and nothing more. They don't pull anything from the surface they're on, since they get their water and food from the air and rain instead. A dischidia never feeds off its host, so the tree's perfectly fine.