How to Plant Cannas (Canna Lily Planting Guide)
Today’s Coast Farms Planting Guide is all about cannas: bold foliage, vibrant blooms, and easy summer colour.
When to Plant Cannas
Cannas (also known as canna lilies) are heat-loving tropical plants that should be planted after the last frost in spring, once the soil has warmed. In cooler climates, wait until late spring, when nighttime temperatures remain consistently above 10°C (50°F). For an earlier display, you can start canna rhizomes indoors in pots a few weeks before transplanting outdoors.
Where to Plant Cannas
Choose a sunny, sheltered location with 6–8 hours of full sun daily for best growth and flowering. Cannas grow best in rich, well-drained soil, though they tolerate heavier soils when improved with organic matter or compost. In hot climates, light afternoon shade helps prevent leaf scorch. Cannas are also excellent container plants for patios, balconies, and decks.
How to Plant Cannas
Dig a planting hole 10–15 cm (4–6 inches) deep and place the canna rhizome horizontally, with the eyes (growth buds) facing upward. Space plants 30–45 cm (12–18 inches) apart to allow room for mature growth. Cover with soil, gently firm, and water thoroughly. For pots, use a large container with free-draining compost and plant the rhizome at the same depth.
Growing and Caring for Cannas
Once established, water cannas regularly, keeping soil evenly moist but not waterlogged. Feed monthly with a balanced liquid fertilizer to encourage lush foliage and continuous blooms. Tall varieties may need staking in windy areas. Remove spent flowers (deadheading) to prolong flowering. In colder climates, lift and store canna rhizomes over winter after the first frost. In warmer regions, cannas can stay in the ground with a thick mulch for winter protection.
