How to Grow Canna Plants

How to Grow Canna Plants

Homeowners grow cannas for two reasons: bright, attractive foliage and colorful gladiolus-like flowers in light orange, pink, coral, and apricot.

Native to Asia and Latin America, cannas are also called "Indian Shot" for their hard, pea-like seeds. Many varieties suit gardens or containers, including water-grown types. Heights range from 18 inches to 6 feet depending on variety.

Note: These flowers attract hummingbirds!

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Plant Propagation

Most gardeners grow cannas from rhizomes. After fall die-back, dig up roots, clean, and store in a cool, dark area until spring. Cannas can also be propagated from seed.

In southern areas, they can remain in-ground over winter with a heavy mulch layer to protect rhizomes from freezing.

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How to Grow Canna Plants

Plant rhizomes in spring. Cannas prefer rich, organic soil and full sun. They need plenty of water but demand well-draining soil (except water-grown varieties).

Divide roots, leaving 1–2 growing tips per section. Plant 3–4 inches deep, spaced 1–3 feet apart. Mix in plenty of compost and organic matter at planting.

Apply nitrogen-rich fertilizer monthly for optimum growth. Keep soil moist all season.

Mulch heavily annually to retain water and replenish organic matter.

Avoid overcrowding—separate and replant established plants every 3–4 years.

In fall, dig up roots for storage. Roots survive outdoors only in the warmest areas.

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Insects and Disease

Insect and disease problems are infrequent. Use insecticides, organic repellents, and fungicides as needed.

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