Ideal for in-ground gardens, petunias put on a spectacular show in containers such as window boxes, hanging baskets and larger containers. Petunias require full sun to grow and bloom well, and that means at least six hours of sunlight per day. Petal size and color are available in a wide variety. From grandiflora to multiflora to the trailing Wave petunias, there’s a petunia for every container.
Fill a pot with soil and dampen the soil with water.
Fill a planting container with potting mix. Water to slightly damped the soil.
Pick petunias based on color and habit.
Select petunias based on the colors you’d like as well as their habit. For window box or hanging planters, choose upright and trailing varieties.
Get the container ready for petunias.
Dig holes in the containers by hand deep enough to cover the entire root ball.
Plant trailing petunias on the sides of larger containers.
Plant the petunias in the holes and cover the roots with soil. When using larger containers, plant upright petunias in the center and trailing petunias on the sides.
Water the plants until water seeps out the bottom of planters.
Give the plants water until it seeps out of drainage holes in the bottom of the containers.