Maintaining Canna indica plants is relatively straightforward:

1. Sunlight: Plant them in a location with full sunlight for at least six hours a day.
2. Watering: Keep the soil consistently moist but not waterlogged. Water deeply once or twice a week, depending on the weather and soil drainage.
3. Soil: Plant them in well-draining soil enriched with organic matter. A slightly acidic to neutral pH level (6.0-7.0) is ideal.
4. Fertilization: Feed with a balanced fertilizer once a month during the growing season to encourage healthy growth and flowering.
5. Mulching: Apply a layer of mulch around the plants to help retain moisture and suppress weeds.
6. Pruning: Remove spent flowers and yellowing or dead leaves to encourage continuous blooming and maintain a tidy appearance.
7. Support: Provide support, such as stakes or trellises, for tall varieties to prevent them from flopping over.
8. Overwintering: In colder climates, dig up rhizomes before the first frost, remove excess soil, and store them in a cool, dry place for the winter.

By following these maintenance tips, you can enjoy lush foliage and vibrant blooms from your Canna indica plants throughout the growing season.