Place the plants along the edge of the container at an angle. Warm-season annuals may be planted after the soil has warmed to the touch in spring and bloom in midsummer. These types include zinnia, verbena, impatiens and marigolds. Most annual plants grow well in containers. Make sure the containers have drainage holes.
Plants grown in containers without holes are likely to become waterlogged.
Any plant grown in a container will need more water than one grown in the soil. If a hanging pot dries out completely, place the entire pot in a basin of water to rehydrate the soil. A washtub works well for this purpose. When planting along the edge of a container, angle plants toward the outside. This way the foliage will cover the rim of the pot and give the finished display a more lush appearance too.