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Storing dahlia tubers doesn’t have to be complicated, but there are a few steps you can take that will maximize their health and viability. In this article, gardening expert Melissa Strauss shares some tricks for keeping your tubers healthy over the winter.
The key to successfully storing dahlia tubers for the winter is making sure they stay dry, have good air circulation, and are in a cool, dark spot. You can store the tubers in a variety of containers – milk crates, plastic bins, paper bags, and cardboard boxes all do the trick.
There are numerous methods to store tubers over the winter. Various methods seem to work about equally well, as long as the procedure keeps the tubers cool (above freezing but ideally below 50 degrees) and allows an exchange of moisture between the tubers and the storage medium.
Because dahlias are hardy only to USDA hardiness zone 9, gardeners in colder climates must dig up dahlia tubers before the first autumn frost and overwinter the tubers indoors and replant them in the spring.
How To Store Dahlia Tubers Over Winter. Below I’ll give you the steps for how to overwinter dahlia tubers, and where to store them. If yours is in a pot, then you can skip the section about packing them, and just store them right in their container.
Store The Tubers. To store tubers over winter, make sure they are completely dry to prevent your tubers from rotting. Store the tubers in a dark, cold (not freezing!) location with good air circulation and moderate humidity. A basement, shed or garage with a temperature of 40-50ºF (4-10°C) is a good spot for storing Dahlias.
Digging and storing dahlia tubers over the winter helps ensure that you have brilliant color in your garden next summer. These simple steps will help you dig, divide, trim and examine your dahlia bulbs with ease.