A: Tree dahlia, Dahlia imperialis, is a dahlia species native to southern Mexico and Guatemala that grows 12 to 20 feet tall. Its pink, lavender or white flowers provide welcome garden color in late ...

There’s a lot that I’m thankful for, including a couple fall-season bloomers in my garden. I have recently mentioned these two plants, which are natives of Mexico, but they are blooming right now and ...

A: Dahlias are native to Central America and are not hardy in cold winters. Where winter temperatures drop below 20 F, gardeners have to dig up the tuberous roots of common dahlias and store them ...

Lavender flower petals along with red, orange and brown autumn leaves litter the lawn at Mac Houfek’s home in Virginia Beach. The petals are falling from a flower whose blossoms grow on a stalk so ...

Q: I have dahlias that I’d like to fertilize and wonder what you would suggest. A: My favorite fertilizer for dahlias is a combination of alfalfa meal and organic flower food. It’s the same recipe I ...

Frank Campise carries a pearl-handled pen knife in his pocket. With a quick flick, he flips it open to cut diminutive dahlia stems in his Arlington Heights front yard, poking orange, pink, purple and ...