How to Overwinter Dahlias, Cannas, and Gladiolus (Corms, Tubers, and Rhizomes)
Dahlias, cannas, and gladiolus are show-stopping summer bloomers, but they require special attention to survive winter. In warm zones, they may stay in the ground with minimal protection, while in cold climates, freezing soil will destroy tubers, rhizomes, or corms. After gardening in both Sonoma Valley and Iowa Zone 5, I’ve developed methods to successfully…