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Plant care

Canna 'Cleopatra' (Cleopatra Canna Lily) care

Canna 'Cleopatra'

Also called Cleopatra Canna Lily.

RHS H3USDA 8-11Mildly toxic to petsIndoor 90-120 cm tall

Watering rhythm

2-3days

Water regularly to maintain consistently moist soil, approximately every 2-3 days in warm weather

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Light

Direct sun (at least 4-6 hours)

Soil

Fertile, well-drained, humus-rich soil

Humidity

40-70%

Temp

15-32°C

Pet safety

Mildly toxic to pets

Mature size

90-120 cm tall

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Requires full sun for vigorous growth and maximum flowering. At least 6 hours of direct sun per day is recommended; in partial shade flowering is sparse. If your only bright window faces south, that's perfect for canna 'cleopatra' — same window any aroid would fry on.

Watering

Watering canna 'cleopatra': water regularly to maintain consistently moist soil, approximately every 2-3 days in warm weather. 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. Do not allow the soil to dry out between waterings during the growing season. Consistent moisture supports rapid stem extension and prolific blooming. Taper off in autumn.

Soil and pot

Canna 'Cleopatra' grows best in fertile, well-drained, humus-rich soil. Work in ample compost or aged manure before planting. A slightly acid to neutral pH (6.0-7.0) suits the species well. Raised beds or mounded planting helps avoid waterlogging. 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

Canna 'Cleopatra' sits happiest at around 40-70% humidity and 15-32°C (59-90°F). Adapts well to a range of outdoor humidities. Mulching conserves moisture and moderates soil temperature, benefiting growth in hot, dry spells. If you keep the room above 15 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 canna 'cleopatra' sparingly. Feed with a balanced granular fertiliser at planting. Supplement with a high-potassium liquid feed every 2-3 weeks during active growth to promote the prolific and varied flowering 'Cleopatra' is known for. 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 canna 'cleopatra' in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Reversion in flower colour — Due to genetic instability, some stems may produce entirely one-colour blooms rather than the prized bicolour. This is a natural trait, not a disease.
  • Canna leaf roller — Caterpillars roll and feed inside leaves. Inspect new growth regularly; remove by hand or spray with Bt.
  • Aphids — Colonise new shoots and can carry viruses. Control with insecticidal soap or a strong water jet.
  • Rhizome rot — Heavy, poorly drained soils lead to rot. Improve soil structure and store rhizomes dry and frost-free over winter.
  • Virus mosaic — Streaked, puckered foliage is a sign of mosaic virus. Control aphid vectors and remove infected plants.

Companion plants

Canna 'Cleopatra' pairs well with Canna 'The President', Zinnia elegans, Verbena bonariensis, and Heliotropium arborescens. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Divide rhizomes in spring, with each division retaining at least one growing eye. Sow fresh seed after scarification (nick or soak in warm water for 24 hours) — note that seedlings will not breed true to the parent's variable colouring. 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

Canna 'Cleopatra' is mildly toxic to pets. Canna 'Cleopatra' is not listed individually by the ASPCA. Like other Canna cultivars, it is considered low toxicity but may cause mild gastrointestinal upset if ingested by dogs or cats. 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.

Canna 'Cleopatra' care — frequently asked questions

What is the common name for Canna 'Cleopatra'?

Canna 'Cleopatra' is most commonly called Canna 'Cleopatra', but it is also known as Cleopatra Canna Lily. The names refer to the same species, so care instructions for Canna 'Cleopatra' apply identically to anything sold as Cleopatra Canna Lily.

How much light does canna 'cleopatra' need?

Canna 'Cleopatra' grows best in direct sun (at least 4-6 hours). Requires full sun for vigorous growth and maximum flowering. At least 6 hours of direct sun per day is recommended; in partial shade flowering is sparse.

How often should I water canna 'cleopatra'?

Water canna 'cleopatra' water regularly to maintain consistently moist soil, approximately every 2-3 days in warm weather. Do not allow the soil to dry out between waterings during the growing season. Consistent moisture supports rapid stem extension and prolific blooming. Taper off in autumn. 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 canna 'cleopatra' toxic to cats and dogs?

Canna 'Cleopatra' is mildly toxic to pets. Canna 'Cleopatra' is not listed individually by the ASPCA. Like other Canna cultivars, it is considered low toxicity but may cause mild gastrointestinal upset if ingested by dogs or cats.

What USDA hardiness zone does canna 'cleopatra' grow in?

Canna 'Cleopatra' is rated for USDA zone 8-11 (lift rhizomes in zones 7 and colder) and RHS hardiness H3. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Canna 'Cleopatra' deep-dive guides

Every aspect of canna 'cleopatra' care, each with its own calibrated guide:

Featured in these plant shortlists

Canna 'Cleopatra' qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Canna 'Cleopatra' is also commonly called Cleopatra Canna Lily.