Preparing dahlias for winter is key because their tubers can split or rot in freezing or soggy soil. Martha now protects her dahlias outdoors by covering the beds with compost, a tarp, and insulating ...

I don’t know any gardeners who casually grow dahlias. Their fireworks riot of color has an intoxicating effect. You may start with one dahlia, but before you know it you have torn out the roses, ...

Dig up dahlias about two weeks after the first frost so the tubers can form eyes for next year’s growth. Clean, divide, dry, and store tubers in moist peat moss or vermiculite in a cool, dark spot.