Deep lilac purple. Dahlia Lilac Bull is a recent introduction and has medium sized decorative flowers. Dahlias provide an injection of colour to the garden border from July to the first frosts, dahlias are one of the most economical plants you can buy for their long flowering. Dahlia Tuber.
Dahlia tubers offer a wide range of colourful flowers the shapes vary from the double decorative, water-lily and dinner plate dahlias to the spiky cactus and semi cactus dahlias. The round Pompon and Ball type dahlias to the single flowered dahlias loved by pollinators.