They can resemble peonies, water lilies, cactus flowers or orchids. With more than 50,000 variations in size, form and color and with blooms from June until frost, dahlias are a late-season gardener's best friend.
Add a floral preservative to hot water (about 130 degrees). Wait to arrange fresh-cut dahlias until the water cools. Change water and recut the stems every day for a display that lasts three to six days.