As a gardening and landscaping expert, I can say that canna lilies do need to be dug up every year in regions where they are not able to survive the winter. This is because canna lilies are considered tender perennials, which means that they are not able to withstand freezing temperatures and will die if left in the ground during the winter months.
In their preferred environment, which is typically USDA hardiness zones 8-10, canna lilies can be grown year-round without the need for digging them up. However, in regions with colder winters, such as Michigan, it is necessary to take steps to protect the canna lilies and ensure their survival for the next growing season.
The process of digging up and storing canna lilies for the winter is relatively simple, but it does require some care and attention. Here’s a step-by-step guide on how to do it:
1. Timing: The best time to dig up canna lilies is after the first frost has occurred, but before the ground freezes completely. This is usually in late fall or early winter, depending on your specific location.
2. Cutting back foliage: Before digging up the canna lilies, it is recommended to cut back the foliage to a few inches above the ground. This will help reduce the amount of plant material that needs to be stored and make the digging process easier.
3. Digging up the rhizomes: Using a garden fork or shovel, carefully dig around the base of the plant, being cautious not to damage the rhizomes. Lift the clump of canna lilies out of the ground, trying to keep the rhizomes intact.
4. Cleaning and drying: Once the canna lilies are out of the ground, gently shake off any excess soil from the rhizomes. It is important to remove any dead or damaged parts of the plant. Allow the rhizomes to dry for a few days in a cool, well-ventilated area.
5. Storing the rhizomes: After the rhizomes have dried, it’s time to store them for the winter. One option is to place them in a container filled with dry peat moss, vermiculite, or wood shavings. Make sure the rhizomes are completely covered and stored in a cool, dry place where temperatures remain above freezing.
6. Checking for rot or pests: Throughout the winter months, it’s a good idea to periodically check the stored rhizomes for any signs of rot or pests. If you notice any issues, remove the affected parts immediately to prevent further damage.
7. Replanting in spring: In early spring, usually after the danger of frost has passed, you can start preparing for the canna lilies’ return to the garden. Remove the stored rhizomes from their storage container and inspect them for any signs of new growth. If you see healthy buds or shoots, it’s time to plant them back in the ground.
By following these steps, you can successfully dig up and store your canna lilies for the winter, ensuring their survival and allowing you to enjoy their beautiful blooms year after year. While it may require some effort, the reward of having these stunning plants in your garden is well worth it.
Personal experience: I have been growing canna lilies in my garden for several years, and I live in a region with harsh winters. Each fall, I go through the process of digging up and storing my canna lilies to protect them from the cold. I have found that by following the steps mentioned above, I have been able to successfully overwinter my canna lilies and have them bloom beautifully in the following spring and summer. It’s always a joy to see these vibrant plants come back to life after a long winter rest.
