Dahlias are a beautiful flower that you can grow for your garden, but they can be difficult to keep alive once winter comes. Dahlias are perennials, which means that they grow and bloom over several years. However, if you want to keep them from dying off in the winter months, you’ll need to overwinter them in the ground.

If you have a garden, you may be wondering if it is possible to overwinter dahlias in the ground. Dahlias are popular flowers that grow well in both cooler and warmer climates. However, they do not always survive the winter months when grown outside. If you want your dahlia plants to survive through the cold weather, there are some steps you can take to make sure they are kept safe from frost and freezing temperatures.

Dahlias need plenty of sunlight, but they should also be placed in an area where they will not get too much direct sunlight during the day. The best place for dahlia plants is one that gets at least six hours of sun per day, but does not get too hot during the summer months. If you live in an area with mild winters, it is possible for your dahlia plants to survive through the winter months by simply covering them up with soil or mulch before cold weather sets in. This will prevent freezing temperatures from damaging your plant’s leaves or stems during wintertime.

Prune Your Dahlias

In the fall, it’s time to remove all the dead foliage and stems. This will make your dahlia plants sturdier for next year and give them a fresh start.

  • Remove all the dead foliage and stems that are crossing each other or growing towards the ground.
  • Remove all the stems that are growing towards the sun as well as those in shaded areas.
  • If you have multiple varieties of dahlias, consider removing any that have lost their leaves so they can focus on flowering in spring rather than producing more leaves (which many people think is unattractive).

Dig Your Tubers

If you dig your dahlias in the fall and winter, store them in a cool, dry place. To prevent rot, they should be kept in a plastic bag or cardboard box which can then be placed inside another container to keep moisture out. If you live in an area with colder winters than I do (and aren’t concerned about possible frost damage from digging), you could also store them outside until springtime.

If you dig dahlias during the warmer months of the year, keep them indoors until fall digging begins. You can cover tubers with straw or hay to protect them from bad weather and pests while waiting for cooler temperatures before digging them up for storage.

Dahlia tubers are large enough that they’re easy to handle on their own (and small enough not to require much room). However, if you’re concerned about damaging any of your plants while handling them, consider placing them into bigger containers like buckets or bins while working on preparing soil beds so that they’ll stay upright as well as protected by more space between each other than normal planting method would provide when planted directly into ground bed without any kind of support structure holding up stems aboveground level.”


As you’re packing up your summer plants, it’s important to keep dahlias in mind. The ideal storage conditions are cool (50 to 55 degrees Fahrenheit), dry, dark, and pest-free. Ideally, this would be inside a basement or garage—but if you don’t have either of those available to you, a pantry or closet works well too.

If possible, keep them in the plastic bags they came in when they were delivered from the nursery. Otherwise, use another plastic bag to store them; this will help keep moisture out and prevent any pests from getting in there with them. If you can’t find the original bags or need more protection against pests, consider wrapping each plant individually with paper towels before putting it into another bag for transportation home.

Second Year

Now that your dahlias have overwintered, they are ready to bloom again the following spring. If you have a container with a dahlia, you will need to water it regularly during the winter. Do not let the soil dry out completely or else it could die over winter.

If you plan on having lots of dahlias in your garden and would like them to spread throughout the year, then divide them in fall or spring before blooming begins. This way, when each plant blooms it will produce more flowers than just one large flower head from one plant.

With proper preparation, you can overwinter dahlias in the ground.

To overwinter dahlias in the ground, you’ll need to do a few things. First, know your zone. Dahlias can survive in colder areas, but for best results it’s best to choose dahlia varieties that are hardy to your zone. Once you have your tubers dug up and dried out (this process takes several weeks), store them in a cool dry place until next spring when they will be ready to plant again.

In the second year after planting, the tubers will send up shoots from their center that look like little cabbages or mini pumpkins as they begin growing into new bulbs.

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