How should I plant Wave Petunias in containers?
For lush, full container displays, place 3 plants in a 10 to 12-in. (25 to 30-cm) container, hanging basket or patio planter. Larger containers will require additional plants for an attractive, proportioned display.
Provide plant nutrition in the soil with a slow release fertilizer, and continue to feed your vigorous Waves every two weeks with a liquid feed to keep those blooms coming! We have more how-to advice here.