Charleen,
Just about anything you can grow in the ground can be grown in an eBucket or ePlanter! There are very few limitations. Except for veggies like potatoes and beets and carrots, but only because of the limited space in a 5-gallon bucket.
But there are self-watering systems made from Rubbermade tubs that have more space and depth for growing stuff like potatoes and beets, etc. These homemade tub systems are referred to as HEBs (homemade Earthboxes).
But, look at my other tutorial, and try the ePlanters for your flowers, cause you can convert decorative planters into a self-watering system.
Linda