Picking a favorite dahlia is like going through a button box. As well as coming in a rainbow of colors, dahlia flowers can range in size from petite 2-inch lollipop-style pompoms to giant 15-inch “dinner plate” blooms. Most varieties grow 4 to 5 feet tall. Both dahlia flowers and tubers are edible. The tubers taste like a cross between a potato and a radish.

From The Farmer’s Almanac