Anthurium andraeanum 'Kozohara' (Kozohara anthurium) care

Light

Bright but filtered. Anthurium andraeanum 'Kozohara' burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Bright, filtered light an east window or a few feet back from south/west drives the heaviest flowering. Direct midday sun scorches the spathes and bleaches the foliage; deep shade stalls blooming and yields leggy growth. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering anthurium andraeanum 'kozohara': when the top 2-3 cm of mix is dry, roughly every 5-7 days in growth. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Water thoroughly until it drains, then let the surface dry before the next round. The thick, fleshy roots rot in soggy mix, so never leave the pot standing in a saucer. Use room-temperature water and ease off in winter.

Soil and pot

Anthurium andraeanum 'Kozohara' grows best in chunky, free-draining epiphytic aroid mix. Blend orchid bark, perlite, and coco coir or peat with a little charcoal. As an epiphyte it needs an airy, open medium that holds light moisture while draining fast; dense potting soil suffocates the aerial-type roots. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Anthurium andraeanum 'Kozohara' sits happiest at around 50-70% humidity and 18-29°C (65-84°F). Tolerates average room humidity but flowers and unfurls cleaner foliage above 50%. Dry air browns leaf edges and spathe tips. Group with other plants or use a pebble tray or humidifier; avoid misting open spathes, which can spot. If you keep the room above 18 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed anthurium andraeanum 'kozohara' sparingly. Feed every 4-6 weeks in spring and summer with a balanced houseplant fertiliser diluted to half strength, or use a high-phosphorus bloom feed to push flowering. Stop or reduce in autumn and winter. Flush the pot occasionally to clear salt build-up, which scorches root tips. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on anthurium andraeanum 'kozohara' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Brown leaf and spathe tips — Low humidity, salt build-up from over-fertilising, or hard tap water. Raise humidity, flush the pot, and switch to filtered or rainwater.
• No or few flowers — Usually too little light or too much nitrogen. Move to brighter indirect light and switch to a higher-phosphorus bloom feed in the growing season.
• Yellowing lower leaves — Often overwatering or compacted, water-retentive mix. Let the top of the mix dry between waterings and repot into a chunkier aroid blend.
• Faded or greenish spathes — Aging blooms naturally green as they age, but persistent dull colour points to insufficient light; brighten the position.

Propagation

Divide the clump at repotting, separating offsets or rooted side crowns each with roots and a growth point. Stem cuttings with aerial roots also root in a moist, airy medium. Seed is slow and hybrids do not come true from it, so division is the practical method. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Anthurium andraeanum 'Kozohara' is toxic to pets. ASPCA lists Anthurium as toxic to cats and dogs. The toxic principle is insoluble calcium oxalate crystals (raphides); chewing releases needle-like crystals causing oral pain and burning, drooling, vomiting, and difficulty swallowing. Keep away from pets and wash hands after handling cut stems. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Anthurium andraeanum 'Kozohara' deep-dive guides

Every aspect of anthurium andraeanum 'kozohara' care, each with its own calibrated guide:

• Anthurium andraeanum 'Kozohara' watering schedule
• Anthurium andraeanum 'Kozohara' light requirements
• Best soil mix for anthurium andraeanum 'kozohara'
• Anthurium andraeanum 'Kozohara' fertilizing guide
• When to repot anthurium andraeanum 'kozohara'
• How to propagate anthurium andraeanum 'kozohara'
• Anthurium andraeanum 'Kozohara' growth rate & size
• Anthurium andraeanum 'Kozohara' cold hardiness
• Anthurium andraeanum 'Kozohara' temperature & humidity
• Is anthurium andraeanum 'kozohara' toxic to cats & dogs?
• Is anthurium andraeanum 'kozohara' toxic to cats?
• Is anthurium andraeanum 'kozohara' toxic to dogs?

Featured in these plant shortlists

Anthurium andraeanum 'Kozohara' qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best trailing & climbing houseplants — Vining and trailing houseplants for shelves, hanging pots, and moss poles — selected by growth habit.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Anthurium andraeanum 'Kozohara' is also commonly called Kozohara anthurium or red anthurium.

• Types of anthurium — varieties identified, with care and pet-safety
• Monstera care — light, water and common problems
• Pothos care — light, water and common problems
• Fiddle leaf fig care — light, water and common problems
• All 2464 plant care guides in the Growli library