11/01/2026
Today was part two of putting our Dahlias to rest for the season! We waited for the first frost, which signaled the plant to start getting itself ready. Then they were cut back a couple of days ago. Cutting, and letting them sit for a few days helps the sugars go back into the tubers. Yesterday they were dug up for the season, washed off and left to dry overnight. Today they were separated out, wrapped and ready for winter storage.
Why do we divide dahlias? It is one way to get more flowers into your garden, Each new mother tuber can become a flower, while growing more tubers off it to flower the next year. We also separate them to look for damage and disease so we can remove that from the garden.
Tubers that will be viable for next year, need a body, neck and eyes. The eyes are harder to spot, but once you see them, you’ll keep seeing them. We cleaned up the little roots just to make it easier to see the eyes, but it is not necessary. Tuber size does not matter when it comes to growing the flower. Tiny tubers can still produce large flowers.
We mark our tubers with the variety name with a Sharpie markers. You can still see the name written on last year’s on some of the mother tubers. If keeping track of which is which is important to you, don’t skip this step. Our Dahlias had name tags with all of them, and when they were cut back, label ribbon was tied to the stem. You can see the orange ribbon in some of the wrapped-up tubers.
It is very important to clean your trimmers between each dahlia so not to spread disease or viruses.
You want to make sure your tubers are dry of soil and any moisture from washing them off. We cut ours apart, making sure each saved tubers had at least one eye. We labeled with Sharpie, then wrapped them in plastic wrap. Each tubers is wrapped individually in the plastic wrap bundle so if any of them do rot over winter, the rot is not touching any other tubers.
Once wrapped they are stored in onion bags, just because that is what we use to keep them all together. You can also store them in wood shavings, sawdust or vermiculite which will keep them from drying out too much. You want to keep them in a cool place, like a basement at 40-50 degrees. Too cold they can freeze and die. Too warm they can start to sprout. If they sprout, cut off the sprouts, don’t break them.
The Ahtanum Youth Park Garden dahlia darlings, are now cleaned, labeled, wrapped and bundled and headed to the the basement of one of our Master Gardeners. They will be back next year, possibly in a new, sunnier location, so be sure to come down and see what these odd looking, potato like things turn into next year!!