Photo showing a group of yellow pompom / pompon dahlia flowers, pictured flowering in the garden sunshine. This type of flower is also known as a ball dahlia and is popular because of its delicate petal pattern, being a favourite at flower shows and in floral arrangements, by nurseries, florists and those keen on flower arranging. Further spiky cactus dahlias can be seen in the background, in red, orange, pink and white colours.