Before planting dahlias, examine your personal container stockpile. Choose containers that are at least as deep as they are wide, preferably deeper.
Ensure your pots have proper drainage holes. Standing water can lead to root rot and fungal disease.
Dahlias range in height from 10 inches to 7 feet, and their blooms range in width from 2 inches to 12 inches.
A potting mix specifically formulated for container gardens should be used to give dahlias a healthy growing foundation.
Select a cane, stake, or cage that is equal in length to your variety’s mature height and drive it firmly into the soil about 4 inches away from the root.
Dahlias are a sun-loving genus, choose a location for your containers that will get at least 6 hours of direct sun a day.
Irrigation requirements will vary depending on region, but dahlias should never be completely dry and they should never be completely soaked.