Table of Contents
- Introduction
- The Best Time to Lift Canna Lily Bulbs
- Understanding Your USDA Hardiness Zone
- Step-by-Step: How to Take Out Canna Lily Bulbs
- The Importance of Curing
- Storing Your Cannas for the Winter
- Caring for Potted Cannas in Winter
- Dividing Your Cannas for More Blooms
- Planning for Spring Success
- Common Myths About Lifting Cannas
- Summary Checklist for Autumn
- Conclusion
- FAQ
Introduction
There is nothing quite like the tropical flair of canna lilies to make a garden feel like a private oasis. With their bold, oversized foliage and vibrant blooms in shades of red, orange, and yellow, they are the undisputed stars of the summer border. At Longfield Gardens, we love how these vigorous plants can transform a yard in just a few months, and you can browse our canna collection to see the tall varieties featured here. However, as the warmth of summer fades into the crisp air of autumn, every gardener faces the same question: when is the right time to bring these tropical beauties indoors for the winter?
Knowing when to take out canna lily bulbs—which are technically called rhizomes—is the secret to ensuring they return even bigger and better next year. This process, often called "lifting," is a rewarding autumn ritual that protects your investment and sets the stage for future growth. It is a simple task that ensures your garden remains a source of joy for years to come. Whether you are a beginner or a seasoned pro, understanding the cues from your plants and the weather will make this transition smooth and successful. If you are planning ahead by zone, our hardiness zone map can help you decide whether lifting is necessary.
In this guide, we will walk you through the timing, the process of digging, and the best ways to store your canna rhizomes over the winter months. By following a few straightforward steps, you can keep your plants healthy and ready for their spring debut. If you want to pair this advice with planting and shipping timing, see Longfield Gardens’ shipping information.
The Best Time to Lift Canna Lily Bulbs
The most reliable signal for when to take out canna lily bulbs comes from the weather. Because cannas are native to tropical and subtropical regions, they have no natural defense against freezing temperatures. They thrive in the heat, but they enter a period of rest once the temperatures drop.
For most gardeners, the "magic moment" occurs right after the first frost of the autumn. You will know it has happened when the lush, green or bronze leaves of your cannas suddenly turn black or dark brown overnight. While this might look a bit startling, it is actually a helpful sign. This light frost kills the foliage but does not harm the rhizomes tucked safely underground. It tells the plant to stop sending energy to the leaves and start focusing on dormant survival.
If you live in a region where a hard freeze happens quickly, you don’t have to wait for the frost to hit. You can safely lift your cannas once the night temperatures consistently dip into the 40s. At this point, the plants have finished their growth cycle for the year. Lifting them before the ground actually freezes is essential, as frozen soil can damage the delicate tissues of the rhizomes.
Key Takeaway: The ideal time to lift canna rhizomes is immediately after the first light frost has blackened the leaves, or when overnight temperatures consistently drop below 45°F.
Understanding Your USDA Hardiness Zone
Your location plays a significant role in determining your autumn timeline. At Longfield Gardens, we recommend checking your USDA hardiness zone to decide if lifting is even necessary. Canna lilies are generally hardy in zones 7 or 8 through 10. In these warmer climates, the ground rarely freezes deep enough to reach the rhizomes.
In zones 8 to 10, you can usually leave your cannas in the ground all year. You simply cut the stalks back to the ground after they turn brown and apply a thick layer of mulch to keep the soil temperature stable. However, for gardeners in zones 3 through 7, lifting is the most reliable way to ensure the plants survive the winter.
Even if you are in a "borderline" zone like 7b, lifting the rhizomes is a great way to guarantee success. It also gives you a chance to inspect the health of the plants and divide them if they have become too large for their space.
Why Timing Matters More Than Tricks
It can be tempting to try "garden hacks" to keep cannas alive outdoors in cold climates, but timing is the one factor that truly matters. If you lift them too early—while the weather is still hot—the rhizomes may not have stored enough energy to last through the winter. If you wait too long and the ground freezes solid, the water inside the rhizomes can expand and cause them to turn to mush. Aim for that "sweet spot" between the first frost and the first hard freeze of the season.
Step-by-Step: How to Take Out Canna Lily Bulbs
Once you have determined it is time to lift, the process is straightforward. You will need a few basic tools: a pair of sharp garden shears or a lopper, a garden fork or spade, and a pair of gloves. Using a garden fork is often better than a spade because it is less likely to accidentally slice through the rhizomes.
1. Cut Back the Foliage
Start by cutting the stalks down to about 2 to 4 inches above the soil line. Removing the heavy, blackened foliage makes the digging process much easier and cleaner. Do not worry about being too precise; the goal is simply to get the stalks out of your way so you can see the base of the plant.
2. Loosen the Soil
Cannas grow from thick, fleshy rhizomes that spread horizontally just beneath the soil surface. To avoid damaging them, start digging about 6 to 10 inches away from the base of the stalks. Push your garden fork deep into the soil and gently pry upward. Work your way around the entire clump to loosen the earth.
3. Lift the Clump
Once the soil is loose, gently lift the entire mass of rhizomes out of the ground. In a single season, a single canna rhizome can grow into a large, heavy clump. If the clump is too heavy to lift all at once, you can use your fork to carefully break it into smaller sections while it is still in the ground.
4. Clean and Inspect
Shake off any large clumps of soil. You can use your hands to brush away the remaining dirt, but avoid using a high-pressure hose. Too much moisture right before storage can encourage rot. Take a moment to inspect the rhizomes. Healthy rhizomes should feel firm and heavy, like a fresh potato. If you find any soft, mushy, or shriveled sections, trim them away with clean shears.
What to Do Next:
- Cut stalks to 3 inches above the soil.
- Dig 10 inches away from the stem to avoid damage.
- Lift the clump gently with a garden fork.
- Remove loose soil by hand, not with water.
- Inspect for firmness and discard any soft spots.
The Importance of Curing
One step that many gardeners skip is "curing." Curing is simply the process of letting the rhizomes dry out slightly before they go into long-term storage. This allows the "skin" of the rhizome to toughen up and any small nicks from the digging process to callus over.
To cure your cannas, place the cleaned rhizomes in a dry, frost-free area for 2 to 3 days. A garage, shed, or covered porch works perfectly. Spread them out in a single layer so air can circulate around them. Avoid placing them in direct sunlight, which can dry them out too much. Once the exterior feels dry to the touch and any remaining soil has turned to dust, they are ready for their winter home.
Storing Your Cannas for the Winter
Storage is where you ensure the "breath of life" stays within the rhizome until spring. The goal is to keep them dormant, which means they need an environment that is cool, dark, and slightly humid but not wet.
Choosing the Right Container
You can store canna rhizomes in several ways depending on the space you have:
- Cardboard Boxes: These are breathable and easy to stack.
- Plastic Bins: If you use plastic, leave the lid slightly ajar or drill small holes in the sides to prevent moisture buildup.
- Paper Bags: Great for smaller quantities or individual varieties.
The Storage Medium
To keep the rhizomes from drying out completely (a process called desiccation), it is best to pack them in a loose material. This material acts as insulation and a moisture regulator. Common choices include:
- Peat Moss: Excellent at holding just enough moisture.
- Wood Shavings: Often used for animal bedding, these provide great airflow.
- Vermiculite or Perlite: Clean and effective for moisture control.
- Damp Sand: A traditional method that works well in very dry basements.
Layer the medium in the bottom of your container, place the rhizomes on top (not touching each other if possible), and cover them with more of the medium.
The Ideal Temperature
The best temperature for storing canna lilies is between 40°F and 50°F. If the area is too warm, the plants may try to start growing in the dark, which depletes their energy. If it is too cold, they may freeze. A cool basement, a crawl space, or a temperature-controlled garage are usually the best spots.
Caring for Potted Cannas in Winter
If you grow your cannas in containers, the process is even simpler. You have two main options for winter care.
The first option is to treat them exactly like garden-grown cannas. Wait for the frost to hit, cut back the foliage, and tip the pot over to remove the soil and rhizomes. Follow the cleaning, curing, and storage steps mentioned above.
The second option is to store the entire pot. After the first frost, cut the stalks back and move the container to a cool, dark, frost-free location like a basement. You do not need to water the pot during the winter. The dry soil in the container will act as the storage medium. In the spring, you can simply bring the pot back into the sun, give it a good soak, and wait for new growth to appear. This is a great time-saver for busy gardeners.
Dividing Your Cannas for More Blooms
One of the most exciting parts of taking out your canna lily bulbs is seeing how much they have grown. Cannas are prolific. A single rhizome planted in May can often result in five or ten new "eyes" (growth points) by October.
You can divide your cannas either in the fall when you lift them or in the spring before you replant. Dividing in the fall saves storage space while dividing in the spring allows you to see exactly where the new growth is starting.
To divide, simply use a clean, sharp knife or your hands to break the rhizomes into pieces. Each piece must have at least one "eye"—a small, often pinkish or white bump that looks like the eye of a potato. These eyes are where the new stems will emerge. By dividing your plants, you can easily expand your garden or share the beauty of Longfield Gardens' varieties with friends and neighbors.
Planning for Spring Success
While the focus is on taking the bulbs out, it helps to keep the return trip in mind. As you pack your rhizomes away, label your containers. It is easy to forget which box contains the tall, bronze-leafed varieties like Tropicanna and which ones hold the shorter, variegated types like Tropicanna.
In the spring, about 4 to 6 weeks before the last frost, you can give your cannas a head start by bringing them into a warm, bright room and planting them in pots. This "waking up" period ensures they are already growing by the time the soil outside is warm enough for planting. Cannas love heat, so wait until the soil is at least 60°F before moving them into the garden.
Common Myths About Lifting Cannas
Many gardeners feel intimidated by the lifting process because of common myths. Some believe that if you miss the first frost by a day, the plants are ruined. In reality, cannas are quite resilient; as long as the ground hasn't frozen deep enough to reach the rhizomes, they are usually fine.
Another myth is that you must wash the rhizomes until they are perfectly clean. Actually, a little bit of leftover soil can sometimes help protect the rhizomes from drying out too quickly. Simple, practical care is always better than over-complicating the process. Focus on the basics: cool, dry, and dark.
Summary Checklist for Autumn
As the season winds down, use this quick checklist to ensure you have covered all the essentials:
- Watch the weather: Wait for the first light frost to turn the leaves brown.
- Cut back: Trim stalks to a few inches above the ground.
- Dig carefully: Use a fork to lift the clumps without piercing the rhizomes.
- Cure: Let them air-dry for a couple of days in a protected area.
- Pack: Place them in a box with peat moss or wood shavings.
- Store: Find a cool, dark spot between 40°F and 50°F.
- Label: Ensure you know which variety is which for next year.
"The quiet time of winter storage is just as important to a canna's life cycle as the vibrant blooming of summer. Proper care now ensures a spectacular show later."
Conclusion
Taking the time to properly lift and store your canna lily bulbs is one of the most rewarding tasks in the garden. It transforms a one-season display into a lifetime of tropical beauty. By watching for the first frost and providing a cool, dry winter home, you are working in harmony with the plant's natural rhythm.
At Longfield Gardens, we believe that gardening should be an achievable and joyful experience. These simple steps for winter care remove the guesswork and help you protect the plants you love. When the spring sun begins to warm the earth again, you will be ready to start the cycle anew with healthy, vigorous rhizomes. If you need help matching products to your garden plan, Longfield Gardens’ About Us page explains more about the company and its guarantees.
- Wait for the first frost to signal dormancy.
- Lift gently and cure for two days before storing.
- Store in a cool, dark place in a breathable medium like peat moss.
Ready to plan next year's tropical retreat? Browse our selection of premium canna lilies and other summer-blooming bulbs to find the perfect colors for your garden. For more planting ideas, the Canna Medium collection offers smaller varieties that work well in mixed borders and containers.
FAQ
Can I leave canna lilies in the ground during winter?
Whether you can leave cannas in the ground depends on your USDA hardiness zone. If you live in zone 8, 9, or 10, you can usually leave them in the ground with a thick layer of mulch for protection. In zones 7 and lower, the ground freezes deep enough to kill the rhizomes, so they must be lifted and stored indoors to survive.
What happens if I dig up my cannas before the first frost?
Digging up cannas before the first frost is perfectly fine, especially if you have a short growing season or expect a sudden hard freeze. As long as the plants have had a full summer of growth to store energy in their rhizomes, they will be ready for dormancy. The frost is simply a convenient natural "timer" that tells you the growing season is officially over. If you are comparing planting windows, Longfield Gardens’ shipping information can help you plan ahead.
Should I wash the dirt off the rhizomes before storing them?
It is best to avoid washing canna rhizomes with a hose, as excess moisture can lead to rot during storage. Instead, let the rhizomes dry for a day or two so the soil becomes crumbly. You can then gently brush off the majority of the dirt by hand before packing them away in your storage medium. If you want another vigorous option for a similar garden effect, Canna Tall Pretoria is a strong choice.
My canna rhizomes look shriveled in mid-winter; what should I do?
If you check your rhizomes in January or February and they look very shriveled, they may be getting too dry. You can lightly mist the storage medium (the peat moss or wood shavings) with a spray bottle of water. Do not soak them; just add enough moisture to the air inside the container to stop the desiccation process. For another bold, heat-loving selection, Canna Tall Australia is a reliable garden performer.
Which canna varieties work well in containers?
Cannas with a slightly shorter habit are often easiest to manage in pots and planters. If you want a container-friendly option, Canna Medium Banana Punch is a good place to start, and Tropicanna Black adds dramatic foliage with vivid color.