When can Cannas go outside?

Canna lilies (also known as Indian Shot) originally hail from the tropical regions of South and Central America. Because of those tropical roots, they have zero tolerance for frost. Before you plant your rhizomes outdoors, you need to be absolutely sure the threat of frost has passed.

For garden beds, it’s best to wait until late May once the nights have warmed up. If you’re growing them in pots, you can actually start giving them some “outdoor time” as early as March on days when it’s at least 50°F (10°C)—just be sure to bring them back inside at night! If you’ve bought pre-grown plants from a nursery or big-box store, I’d recommend waiting until June to transplant them into the ground so they don’t get a cold shock.

Finding the perfect spot

To really thrive, Cannas need as much sunshine as they can get. Look for a warm spot that’s well-protected from harsh winds. They also love moisture, but they hate “wet feet,” so drainage is key. While Cannas are actually pretty low-maintenance once they get going, they are a bit picky about their soil. For the happiest plants, aim for soil that is:

• Rich in nutrients
• Well-draining
• Loamy
• High in organic matter (humus)
• Slightly acidic (pH between 5 and 6)

Planting in garden beds

Before you put your rhizomes in the ground, give the soil a good loosening—aim for a depth of about 12 to 15 inches (30-40 cm). Dig a hole and plant the rhizomes about 3 to 4 inches deep.

Space is important for these showstoppers! Make sure to leave about 12 to 24 inches between each rhizome. Also, give them some breathing room from other plant species—a distance of at least 20 inches (half a meter) from their neighbors will help them grow their best.