Houseplant · Araceae
Velvet Cardboard Anthurium
Anthurium clarinervium
Those velvety, white-veined leaves earn it a spot, but this anthurium wants warmth, humidity, and a careful hand with the watering can.
Bright indirect
65–85°F · 18–29°C
USDA 11–12
1–4 ft · 0.3–1.1 m
Overview
The velvet cardboard anthurium is grown for its leaves, not its flowers. Each heart-shaped blade is thick and stiff like cardboard, finished in a deep, velvety green and laced with pale, almost white veins that stand out across the surface. It comes from the limestone hills of Chiapas in southern Mexico, where it grows as an epiphyte, clinging to rock and bark rather than rooting in deep soil.
This is a slow grower and a demanding one. Mature plants stay compact, reaching 1 to 3.5 feet (30 to 107 cm) tall with a tidy spread, so they suit a bright shelf or table rather than a floor corner. The trade-off for those striking leaves is that the plant has little patience for dry air, soggy roots, or harsh sun, and it tells you quickly when any of the three is wrong.
Get the basics right and it rewards you with one new leaf after another, each a little larger than the last. Treat it like an epiphyte that happens to live in a pot, give it bright indirect light and humid air, and it settles in as a long-lived houseplant.
Care
The short version: bright indirect light, a coarse and fast-draining mix, humidity above 50%, and steady warmth. Water thoroughly, then let the top half of the pot dry before you water again.
Light
Give it bright, indirect light through most of the day. It also gets by in medium indirect light, just more slowly, but direct sun scorches the leaves and leaves pale, bleached patches that never recover.
Water
Water thoroughly, then let the top half of the pot dry before watering again. The roots need air as much as moisture, so the worst thing you can do is keep the mix constantly wet. Soggy soil is the fastest way to rot the roots and lose the plant.
Soil
Plant it in a coarse, fast-draining mix built for epiphytes, with peat moss, pine bark, and perlite holding plenty of air. The plant likes things on the acidic side, around pH 6.0 or a touch lower, and a heavy, dense potting soil will smother the roots.
Temperature
Keep it warm and steady, between 65°F and 85°F (18°C to 29°C). It has no tolerance for frost or cold drafts, so keep it clear of chilly windows and doorways in winter.
Humidity
This is the part most people underestimate. The plant wants humidity above 50%, and dry indoor air shows up as brown, crispy leaf tips. Stand the pot on a tray of moist gravel, group it with other plants, or run a humidifier nearby.
Feeding
Anthuriums need very little feeding. A dilute, balanced houseplant fertilizer during the spring and summer growth is plenty, and going heavier does more harm than good.
Pruning
There's almost nothing to prune. Just snip off any leaf that yellows, browns, or gets damaged, cutting it back at the base to keep the plant tidy and the energy going to healthy growth.
Repotting
Repot only when the roots have filled the pot, which for a slow grower like this is rarely. When you do, move up just one pot size into fresh, coarse mix so the roots don't sit in a large, slow-draining volume of wet soil.
Size & spacing
Indoors it reaches 1 to 3.5 feet (30 to 107 cm) tall with a compact spread of 9 to 12 inches (23 to 30 cm). That tidy footprint makes it a good choice for a bright tabletop or shelf rather than the floor.
Troubleshooting
Most problems with this anthurium trace back to water, air, or light. The plant shows trouble on its leaves first, so check them often. Match what you see below and adjust before a small issue turns into a lost plant.
Wilting even though the soil is wet
A plant that droops in soggy soil usually has root rot from overwatering or a mix that drains too slowly. Ease up on watering, slide the plant out, and trim away any roots that are brown, soft, or mushy. Repot into a coarse, fast-draining epiphytic mix and let the medium dry slightly between waterings from now on.
Fix:
- Reduce watering frequency
- Repot into a coarse, very well-drained epiphytic/soilless mix
- Remove rotted roots
Pale, bleached patches on sun-exposed leaves
Direct sun burns the velvety leaves and leaves washed-out, scorched patches behind. Move the plant to bright but indirect light and shield it from the harsh midday sun. The damaged leaves won't recover, but new growth comes in clean once the light is right.
Fix:
- Move to bright, indirect light
- Shield from direct midday sun
Sticky residue, webbing, or specks on the leaves
Mealybugs, spider mites, scale, whiteflies, aphids, and thrips all target anthuriums, leaving behind sticky honeydew, fine webbing, or stippled, distorted new growth. Move the plant away from your others, wash the pests off, and treat with insecticidal soap or horticultural oil, repeating as the label directs. Check new plants and foliage often so an infestation never gets a head start.
Fix:
- Isolate the plant
- Wash off pests and treat with insecticidal soap or horticultural oil
- Repeat treatments per product label
Brown, crispy tips along the leaf edges
Dry air is almost always the cause, and this plant wants humidity above 50%. Raise the moisture around it with a tray of moist gravel, a cluster of other plants, or a humidifier, and keep it away from heating and cooling vents that strip the air dry.
Fix:
- Raise humidity (humidity tray of moist gravel, grouping plants, or a humid enclosure)
- Avoid placement near heating/cooling vents
Toxicity
Every part of this plant is poisonous if chewed or swallowed. Like other plants in the arum family, it carries insoluble calcium oxalate crystals that sting the mouth and throat on contact. Keep it away from pets and children, and wash your hands after handling it, since the sap can irritate skin.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Moderate
A cat that bites a leaf gets an immediate burning in the mouth, with swelling of the lips, tongue, and throat, heavy drooling, vomiting, and trouble swallowing.
Dogs Moderate
The crystals sting a dog's mouth on the first chew, bringing on drooling, pawing at the face, vomiting, and a sore, swollen tongue and lips.
Horses Moderate
Horses get the same painful mouth and throat irritation, with swelling and drooling that makes swallowing hard, though they don't vomit.
Rabbits Toxic
The same calcium oxalate crystals make this plant unsafe for rabbits. Keep it well out of reach of any rabbit that roams the house.
Livestock Toxic
Grazing animals such as goats and sheep are also harmed by the crystals, which inflame the mouth and gut. It isn't a plant they should reach.
Birds Toxic
Pet birds are at risk too, since a curious nibble brings the same caustic irritation to a small, sensitive mouth.
People Caution
No part of this plant is meant to be eaten, and chewing it burns the mouth and throat. The sap can also leave skin red and itchy, so wash your hands after handling it and keep it away from young children.
Sap may cause contact dermatitis; wash hands after handling and keep out of reach of pets and children
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
How to propagate
You can make more of this anthurium from seed or by dividing an established clump, though neither route is fast and approved sources give little species-specific detail.
SeedModerate
Not specified in approved sources · Unknown
You can grow this anthurium from seed, though it asks for patience and a steady hand. Approved sources list seed as a method for the genus but give no species-specific timing, so expect to work it out as you go.
DivisionModerate
Unknown · Unknown
Dividing the clump is the usual way to multiply foliage anthuriums like this one. Lift a mature plant, separate a section with its own roots, and pot it on, treating this as a provisional method since no detailed protocol is documented in the approved sources.
Myths
Anthuriums need to be kept constantly wet because they are tropical.
Tropical doesn't mean swampy. These are epiphytes that grow on rock and bark in the wild, so their roots need air and a coarse, fast-draining mix. Water well, then let the medium dry slightly before the next round, because constant wetness rots the roots faster than anything else.