Dahlia for sale in the market is usually in the form of tubers or cuttings. The best time to buy and plant a dahlia is in the spring when the threat of frost has passed. Planting dahlias with well-established roots and 2 to 3 pairs of leaves brings the highest success. Avoid buying tubers that appear wrinkled or rotten and check for even a little bit of green growth as this is a good sign that the dahlia for sale is healthy.
The colorful spiky flowers of dahlia generally bloom from midsummer to first frost and ranges in color and even size. Most varieties grow 4 to 5 feet tall.