Does it need tap water?

No, always use distilled, rain, or reverse osmosis water to avoid mineral buildup.

How do I keep it cool?

You can use cool water irrigation or place the pot in a shaded area during the hottest part of the day.

Plant guide

Cobra lily.

Darlingtonia californica

Pronounced dar-lin-TOH-nee-uh kal-i-FOR-ni-kuh

Also known as California pitcherplant, California-pitcherplant, Cobra Lily, calf's head, cobra plant, cobra-lily, California pitcher plant

California pitcher plant — Photo by Aaron Carlson (CC BY) via iNaturalist

The cobra lily is a fascinating carnivorous plant native to boggy areas in Oregon and California. It captures insects by luring them into a hooded, pitcher shaped leaf that mimics a striking cobra. It is a rewarding but challenging plant to keep happy in a home environment.

Another photo of Cobra lily — Photo by harrii (CC BY) via gbif

At a glance

Care level: Difficult
Plant type: Carnivorous perennial
Light: Full sun to partial shade with cool roots
Indoor light: Bright indirect
Water: Every 1 to 3 days
Mature size: 30 to 90 cm
Growth rate: Slow
Hardiness: USDA 7 to 9
Bloom time: Late spring to early summer

Care

Keep the root system cool by using distilled or rain water and providing plenty of airflow. Watch for wilting or browning leaves, which often signal that the roots are too warm or the water quality is poor. Always keep the soil consistently moist but never waterlogged.

Watering: Always use distilled, rain, or reverse osmosis water to keep the soil constantly damp.
Feeding: Do not fertilize this plant as it gets all its nutrients from the insects it catches.
Pruning: Trim away dead or decaying pitchers during the dormant season to keep the plant tidy.
Repotting: Repot only when the plant has clearly outgrown its container or the media has broken down.
Soil: Sphagnum moss and perlite mix
Soil pH: Acidic
Temperature: -5 to 25°C
Humidity: 60 to 90%
Drought tolerance: Low
Lifespan: Perennial, can live for many years with proper care.
Fragrance: Light
Deer and rabbits: High

Signs it needs repotting

Roots growing out of the drainage holes.
The plant has produced multiple offsets that are crowding the container.
The growing medium has broken down and no longer drains well.

Safety

People: The plant is not considered toxic, but it is not meant for consumption.
Children: The pitcher structure can be fragile and may pose a minor choking hazard if small parts are ingested.
Edibility: This plant is not edible and should never be consumed.

How to identify it

Hooded, cobra shaped pitcher leaves
Translucent windows on the hood
Forked, tongue like appendage
Yellowish green to reddish coloration

Height: 0.3 to 0.8m
Spread: 0.15 to 0.45m
Leaves: green, red, yellow, evergreen
Flowers: purple, green, 3 to 5cm

Problems to watch for

Root RotCommon
AphidsUncommon
Botrytis BlightUncommon
Fungus GnatsUncommon

By symptom

Plant problems by symptom

Check your cobra lily from a photo

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Growing it

Propagation: division, seed
When to plant: spring
Overwintering: Keep the plant in a cool, bright location during winter. Ensure the soil stays moist but not waterlogged.
In containers: It grows well in pots, but requires a tall, well draining container to keep the roots cool.

Division

Gently remove the plant from its pot in early spring.
Identify the rhizome offsets that have their own roots.
Carefully separate the offsets and pot them in fresh, damp sphagnum moss.

Group carnivorous plants together to maintain a consistent microclimate of high humidity.

Grows well with

Sundew · They share similar moisture and light requirements in a bog setting.
Butterwort · These plants thrive in the same cool, wet, nutrient poor conditions.

Similar species

Sarracenia · These are also pitcher plants but generally easier to grow in standard bog conditions.

Science

Family: Sarraceniaceae
Genus: Darlingtonia
Order: Ericales
Class: Magnoliopsida
Native range: Northern California and Southern Oregon
Conservation: This plant is considered rare in the wild and should only be purchased from nurseries that propagate their own stock.

It grows in nutrient poor, serpentine seeps where cold water keeps the roots cool.

Value to wildlife: nectar source
Pollinators: bees
Uses: bog gardens, carnivorous plant collections

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 4/9
Light: 7/9
Temperature: 4/9
Moisture: 9/9
Nutrients: 1/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need tap water?: No, always use distilled, rain, or reverse osmosis water to avoid mineral buildup.
How do I keep it cool?: You can use cool water irrigation or place the pot in a shaded area during the hottest part of the day.

Where the name comes from

The genus name honors William Darlington, a botanist, while the species name refers to its native range in California.

Good to know

It is commonly called the cobra lily because its leaves resemble a striking cobra.
Unlike many other pitcher plants, it does not produce digestive enzymes but relies on symbiotic bacteria.
It thrives in cold, running water, which is quite unique for a carnivorous plant.

Also in

Deer-resistant plants

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.