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Plant care

Heart-leaved Pinellia (Cordate Pinellia) care

Pinellia cordata

Also called Heart-leaved Pinellia, Cordate Pinellia.

RHS H4USDA 7–10Toxic to petsIndoor 20–35 cm tall

Watering rhythm

5-7days

Every 5–7 days during active growth; reduce in dormancy

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Light

Medium indirect light (a couple of metres from a window)

Soil

Humus-rich, moisture-retentive, well-draining loam

Humidity

50–70%

Temp

10–25°C

Pet safety

Toxic to pets

Mature size

20–35 cm tall

Care at a glance

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness heart-leaved pinellia grows fastest in. Prefers dappled or partial shade — mimicking its native woodland floor habitat in China and Japan. Tolerates morning sun but scorches in prolonged direct afternoon light. A north- or east-facing windowsill or a shaded outdoor bed suits it well. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for every 5–7 days during active growth; reduce in dormancy for heart-leaved pinellia, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Keep soil evenly moist but never waterlogged during spring and summer growth. Allow the top 1–2 cm to dry between waterings. Dramatically reduce watering in autumn as foliage dies back; keep the dormant corm barely moist or dry over winter.

Soil and pot

Heart-leaved Pinellia grows best in humus-rich, moisture-retentive, well-draining loam. Use a mix of loam, leaf mould, and perlite (2:2:1). Good drainage is essential to prevent corm rot, but the mix should retain adequate moisture between waterings. A slightly acidic to neutral pH of 6.0–7.0 is ideal. 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

Heart-leaved Pinellia sits happiest at around 50–70% humidity and 10–25°C (50–77°F). Appreciates moderate to high ambient humidity reflecting its woodland habitat. In dry indoor conditions, mist the foliage occasionally or place the pot on a pebble tray with water. Low humidity can cause leaf-tip browning. If you keep the room above 10–25°C 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 heart-leaved pinellia sparingly. Feed monthly during the growing season (spring to late summer) with a balanced liquid fertiliser diluted to half strength. Avoid high-nitrogen feeds that promote lush foliage at the expense of corm development. Do not fertilise during dormancy. 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 heart-leaved pinellia in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Corm rot — Overwatering or poorly draining soil causes the corm to rot at the base. Ensure the pot has drainage holes and allow the top of the compost to partially dry between waterings. Reduce water significantly in autumn.
  • Leaf scorch — Direct afternoon sun bleaches and scorches the heart-shaped leaves. Move the plant to brighter indirect light or dappled shade. Ensure adequate soil moisture in warmer months.
  • Failure to re-emerge after dormancy — If the corm is kept too cold and wet over winter it may rot. Store dormant corms in barely moist, frost-free conditions (above 5°C/41°F). Check for firmness before replanting in spring.

Propagation

Propagate by division of offsets (small cormlets) that form around the main corm in autumn when repotting. Each cormlet can be separated and potted individually in humus-rich compost. Seeds are rarely used for home propagation. 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

Heart-leaved Pinellia is toxic to pets. All parts of Pinellia species contain calcium oxalate raphides (an Araceae family characteristic), causing intense oral irritation, swelling, and gastrointestinal upset in cats, dogs, and humans if ingested raw. ASPCA lists the Araceae family as toxic to cats and dogs. The corm is detoxified by drying or processing in traditional Chinese herbal medicine but must never be consumed raw. 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.

Heart-leaved Pinellia care — frequently asked questions

What is the common name for Pinellia cordata?

Pinellia cordata is most commonly called Heart-leaved Pinellia, but it is also known as Heart-leaved Pinellia, Cordate Pinellia. The names refer to the same species, so care instructions for Heart-leaved Pinellia apply identically to anything sold as Cordate Pinellia.

How much light does heart-leaved pinellia need?

Heart-leaved Pinellia grows best in medium indirect light (a couple of metres from a window). Prefers dappled or partial shade — mimicking its native woodland floor habitat in China and Japan. Tolerates morning sun but scorches in prolonged direct afternoon light. A north- or east-facing windowsill or a shaded outdoor bed suits it well.

How often should I water heart-leaved pinellia?

Water heart-leaved pinellia every 5–7 days during active growth; reduce in dormancy. Keep soil evenly moist but never waterlogged during spring and summer growth. Allow the top 1–2 cm to dry between waterings. Dramatically reduce watering in autumn as foliage dies back; keep the dormant corm barely moist or dry over winter. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is heart-leaved pinellia toxic to cats and dogs?

Heart-leaved Pinellia is toxic to pets. All parts of Pinellia species contain calcium oxalate raphides (an Araceae family characteristic), causing intense oral irritation, swelling, and gastrointestinal upset in cats, dogs, and humans if ingested raw. ASPCA lists the Araceae family as toxic to cats and dogs. The corm is detoxified by drying or processing in traditional Chinese herbal medicine but must never be consumed raw.

What USDA hardiness zone does heart-leaved pinellia grow in?

Heart-leaved Pinellia is rated for USDA zone 7–10 and RHS hardiness H4. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Heart-leaved Pinellia deep-dive guides

Every aspect of heart-leaved pinellia care, each with its own calibrated guide:

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Heart-leaved Pinellia qualifies for 1 curated Growli shortlist — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

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Heart-leaved Pinellia is also commonly called Heart-leaved Pinellia or Cordate Pinellia.