Not everything in the garden can handle a hard freeze. Dahlias, gladiolus, cannas, and other tender bulbs — along with potted tropicals and tender perennials — need to come indoors or underground before the cold really sets in if you want them back next year.
Wait for the foliage to blacken. For dahlias and cannas, let the first light frost blacken the foliage before digging — this signals the plant has pulled its energy back down into the tuber or bulb.
Dig carefully. Loosen soil well outside the plant before lifting to avoid slicing into the tubers. Gently shake or rinse off excess soil and let them air-dry for a day or two out of direct sun.
Store in the right medium. Pack dried tubers and bulbs in slightly damp peat moss, vermiculite, or sawdust in a box or paper bag, and store somewhere cool (40-50°F) and dark — a basement or unheated closet works well. Check monthly; add a light misting if they’re shriveling, or open the container for more airflow if you see mold.
Handle potted plants differently. Tender potted perennials and tropicals that are too big to treat as houseplants can often be tucked into an unheated garage or basement and kept nearly dry through winter — they’re dormant, not dead, and don’t need light or much water until spring.
Label everything. It’s easy to forget which bag is which by March. A simple tag with the variety and dig date saves guesswork come spring planting.
A little effort now means you won’t have to rebuy the same dahlias or cannas every single year.
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