Canna bulbs (rhizomes) should generally be planted about 4 inches (approximately 10 cm) deep in the soil. The planting hole should be deep enough to cover the rhizome with soil, with the "eyes" or growing points facing upwards. For tall varieties, spacing should be about 2 feet apart, while medium to dwarf types can be planted about 1 foot apart. Some sources suggest planting as shallow as 2 inches deep, but 4 inches is a commonly recommended depth to ensure good growth and stability, especially for taller cultivars. After planting, water the soil to settle it around the bulbs

. Summary:

• Plant depth: about 4 inches (10 cm)
• Eyes facing up
• Spacing: 2 feet apart for tall varieties, 1 foot for smaller types
• Water well after planting

This depth provides enough soil coverage for protection and moisture retention while allowing the shoots to emerge easily.