Phasion variegated canna lilies need consistently moist soil, and prefer a bit of humidity. They're great for planting near water features or in humid climates. Make sure to provide them with a few inches of water per week during dry spells, and don't allow more than the top inch of soil to dry out. Depending upon your planting site, you can use a pebble tray, mister, or watering system to keep these plants from drying out due to lack of moisture and humidity.