Dahlias are beautiful, tender perennials that flower from summer into autumn, providing a long season of color and interest. After flowering, dahlias start to rot back into the ground and the nutrients from the plant are returned to the tubers, which remain in the ground over winter and start growing again in spring. However, because dahlias are tender, they don’t reliably survive British winters. If you live in the north or if you experience a particularly long, cold winter, your dahlia tubers may rot and have to be replaced. So, while you could take the risk and replace them if they rot, you can guarantee your dahlias getting through winter by digging them up and storing them. Here are the steps to follow:

1. Once the dahlia foliage has started to die down, dig all around the clump and lift the tubers with a fork, taking great care not to damage them with the fork.

2. Cut the Dahlia stalks away close to the ground with secateurs or loppers.

3. Leave the tubers to dry for a week.

4. Brush off any soil and remove any dead or damaged tubers.

5. Pack your dahlia tubers in a box or pot, and cover them with dry compost. Its important to ensure the compost is dry, as damp compost can cause the tubers to rot.

6. Store the box or pot in a cool, dry place, such as a garage or shed, where the temperature remains above freezing.

7. Check the tubers regularly over winter to make sure they are not rotting or drying out. If they are, adjust the storage conditions accordingly.

By following these steps, you can ensure that your dahlias survive the winter and are ready to be replanted in the spring for another season of beautiful blooms.