How to Dry and Store Canna Lily Bulbs

Table of Contents

1. Introduction
2. Why Canna Lilies Need Winter Storage
3. Timing Your Harvest for Best Results
4. How to Lift Canna Rhizomes Carefully
5. Cleaning and Preparing for Drying
6. The Importance of Curing and Drying
7. Choosing the Right Storage Medium
8. Selecting a Storage Container
9. Finding the Perfect Winter Location
10. Monthly Maintenance Checks
11. Dividing Rhizomes for More Plants
12. Storing Potted Cannas
13. Preparing for Spring Replanting
14. Encouragement for All Skill Levels
15. Conclusion
16. FAQ

Introduction

There is nothing quite like the tropical energy that canna lilies bring to a summer garden. Their oversized, paddle-shaped leaves and neon-bright blooms create a vacation-like atmosphere right in your backyard. As the season winds down, you can keep that excitement going by preparing your canna lilies for their winter rest. Saving your favorite varieties from year to year is one of the most rewarding parts of being a gardener.

At Longfield Gardens, we want to help you enjoy these stunning Tall Cannas for many seasons to come. While cannas are tropical by nature, they are incredibly easy to save if you live in a region with cold winters. You do not need professional equipment or a greenhouse to keep them safe until spring.

This guide will walk you through the simple process of lifting, drying, and storing your canna rhizomes. For a broader overview, see All About Cannas. Whether you are a beginner or a seasoned gardener, these steps will ensure your plants return even bigger and better next year. Learning how to dry and store canna lily bulbs is the best way to protect your investment and build a bigger garden every year.

Why Canna Lilies Need Winter Storage

Canna lilies grow from thick, fleshy underground stems called rhizomes. While many gardeners call them "bulbs," they function a bit differently. These rhizomes store energy during the summer to fuel the next year’s growth. In warm climates, specifically USDA zones 8 through 11, cannas can stay in the ground all year. If you are not sure which zone you garden in, use the Hardiness Zone Map.

In cooler regions, the freezing temperatures of winter will damage the moisture-rich rhizomes. If the ground freezes several inches deep, the cells inside the rhizome will rupture, causing the plant to rot. By lifting them out of the soil and storing them in a frost-free spot, you are simply giving them a safe place to sleep.

This dormant period is a natural part of the plant's life cycle. Even in warmer areas, cannas often take a break during the winter months. Moving them indoors allows you to control their environment and keep them healthy. It is a straightforward task that guarantees a lush, tropical display when the warm weather returns.

Timing Your Harvest for Best Results

Timing is everything when it comes to preparing cannas for storage. You want to give the plants as much time as possible to store energy in their rhizomes. This energy comes from the sun hitting the leaves throughout the summer and early fall. The longer the leaves stay green, the more food the plant can pack away for next season.

The best time to dig up your cannas is after the first light frost in the fall. Our How to Overwinter Canna Lily Bulbs guide covers the process in detail. You will notice the foliage turning brown or black after a cold night. This is a clear signal from nature that the plant is entering dormancy. The frost kills the top growth but generally does not harm the rhizomes buried a few inches deep.

If a frost is late in coming, you can still dig them up in late autumn once the leaves begin to yellow on their own. The goal is to get them out of the ground before the soil itself freezes solid. A light surface frost is a helpful "off switch," but a deep freeze is something to avoid. Watching your local weather forecast will help you pick the perfect weekend for this garden task.

How to Lift Canna Rhizomes Carefully

Before you start digging, you will need a few basic tools. A garden fork is often better than a shovel for this job. Shovel blades can accidentally slice through the rhizomes, while the tines of a garden fork are more likely to slide around them. If you only have a shovel, just be sure to give the plant plenty of "breathing room" by digging a wide circle.

Start by cutting the stems back. Use sharp garden shears to prune the foliage down to about 4 or 6 inches above the soil line. These short stalks act as handles and help you keep track of where the rhizomes are as you work. Removing the bulk of the foliage also makes the clumps much easier to handle.

Insert your garden fork into the soil about a foot away from the base of the stems. Gently pry upward to loosen the soil all the way around the plant. Once the soil is loose, you can lift the entire clump out of the ground. Don't be surprised if the clump is much larger than what you planted in the spring. Cannas are vigorous growers and often double or triple in size over a single summer. If you want to start with more of these heat-loving plants next season, browse our cannas.

Key Takeaway: Always dig wider than you think you need to. Canna rhizomes spread horizontally just beneath the surface, and a wide berth prevents accidental damage to the roots.

Cleaning and Preparing for Drying

Once the rhizomes are out of the ground, you need to remove the excess soil. You can do this by gently shaking the clump or using your hands to brush away large chunks of dirt. Some gardeners prefer to use a garden hose to wash the rhizomes clean. This makes it easier to see the individual sections and any "eyes" or growth points.

If you choose to wash your rhizomes, be very gentle. The outer skin of a fresh rhizome can be thin and easily bruised. You do not need to scrub them until they are perfectly clean. Removing the bulk of the mud is enough. If your soil is very sandy, a simple shake is usually sufficient, which keeps the rhizomes drier from the start.

After cleaning, take a moment to inspect your harvest. Look for any sections that feel soft, mushy, or show signs of insect damage. Use a clean, sharp knife to trim away any unhealthy parts. This prevents rot from spreading to the healthy sections during the winter. If you are new to the process, How to Care for Canna Lily Bulbs offers a complete seasonal guide.

The Importance of Curing and Drying

The most critical step in the storage process is "curing" the rhizomes. This is simply a fancy word for letting them air-dry. When you first dig up a canna, the skin is soft and the moisture content is very high. If you put them directly into a storage box while they are damp, they will almost certainly grow mold or rot.

Find a dry, well-ventilated spot that is out of direct sunlight. A garage, a shed, or a covered porch works perfectly. Spread the rhizomes out in a single layer. Do not stack them on top of each other, as this traps moisture between the layers. You want air to circulate freely around every side of the rhizome.

The drying process typically takes anywhere from three to seven days. During this time, the outer skin will toughen up and any remaining soil will dry into a fine dust. This tougher skin acts as a protective barrier against diseases during the long winter months. Once the surface feels dry to the touch and the cut ends of the stems have shriveled slightly, they are ready for their final storage home.

Signs of Properly Cured Rhizomes:

• The outer skin feels firm and dry, not tacky.
• Soil remnants easily brush off with a finger.
• Cut stem ends look "corked over" or dried out.
• The rhizome feels heavy for its size, indicating it still has internal moisture.

Choosing the Right Storage Medium

Canna rhizomes are like Goldilocks; they don't want to be too wet, and they don't want to be too dry. If they stay wet, they rot. If they get too dry, they shrivel up and die. To keep them "just right," we use a storage medium that regulates humidity.

There are several great options for packing your rhizomes:

• Peat Moss: This is a classic choice because it holds a tiny bit of moisture but stays airy.
• Vermiculite: This mineral is excellent for moisture control and is very lightweight.
• Wood Shavings: Pine or cedar shavings (like those sold for pet bedding) provide great insulation and airflow.
• Newspaper: Wrapping individual rhizomes in sheets of dry newspaper is a simple and effective low-cost method.

At Longfield Gardens, we have found that a mix of peat moss or wood shavings in a breathable container works best for most home gardeners. The goal is to provide a buffer between the rhizomes and the outside air. This prevents the rhizomes from losing too much of their own internal water supply while they wait for spring.

Selecting a Storage Container

The container you choose should allow for some air exchange. Avoid airtight plastic bins or sealed bags. Without airflow, any tiny amount of moisture trapped inside will turn into condensation, leading to mold.

Cardboard boxes are an excellent choice because they are breathable and easy to stack. Large paper grocery bags also work well for smaller collections. If you prefer using plastic bins, simply drill several holes in the sides and the lid to ensure the plants can breathe.

Place a layer of your chosen storage medium (like peat moss) at the bottom of the container. Lay the rhizomes on top, making sure they aren't touching each other. If one starts to rot, you don't want it to be in direct contact with its neighbor. Cover them with more medium and repeat the layers until the box is full.

Key Takeaway: Label your boxes! It is easy to forget which variety is which by the time March rolls around. Write the color, height, and variety name on the outside of the box or on a tag tucked inside.

Finding the Perfect Winter Location

The location where you keep your boxes is just as important as how you pack them. Cannas need a spot that is cool and dark. The ideal temperature range is between 40°F and 55°F. This range is cold enough to keep the plant in a deep sleep but warm enough to prevent freezing.

An unheated basement is often the perfect spot. A crawl space or a cool closet in a mudroom can also work well. Avoid placing your boxes near a furnace, water heater, or heating vents, as the warmth will cause the rhizomes to wake up too early or dry out completely.

Likewise, be careful with unheated garages or sheds if you live in a very cold climate. If the temperature inside the building drops below freezing, the rhizomes will be damaged. If you use a garage, place the boxes on a shelf rather than directly on the cold concrete floor. You can also wrap the entire box in an old blanket for an extra layer of insulation.

Monthly Maintenance Checks

Storing your cannas is not a "set it and forget it" task. It is a good idea to check on them about once a month throughout the winter. This only takes a few minutes but can save your entire collection if a problem starts to develop.

Open your boxes and feel a few of the rhizomes. They should feel firm and heavy. If you notice any that are turning soft or smelling sour, remove them immediately and throw them away. This prevents the rot from spreading to the healthy plants.

If the rhizomes look very shriveled and feel lightweight, they may be getting too dry. You can remedy this by lightly misting the storage medium with a spray bottle of water. Do not soak the box; you just want to add a tiny hint of humidity back into the air. Most of the time, if you have packed them well, they will not need any extra water at all.

What to do next:

1. Set a recurring reminder on your phone for the first of every month.
2. Open each storage box and check for firm textures.
3. Discard any rhizomes that show signs of mold or soft spots.
4. Lightly mist the packing material only if the rhizomes appear significantly shriveled.

Dividing Rhizomes for More Plants

One of the best things about learning how to dry and store canna lily bulbs is that you end up with more plants for free. Cannas grow by adding new sections to the rhizome. Over time, these clumps become crowded. You can divide them to create new plants for other parts of your yard or to share with friends. If you want a mid-sized option for the garden or patio, Medium Cannas are a useful place to start.

You can divide your cannas either in the fall before you store them or in the spring before you plant them. Spring is often easier because you can see the "eyes" (the small bumps where new stems will grow) more clearly. However, if your clumps are too large to fit into your storage boxes, fall division is perfectly fine.

To divide, simply pull the rhizomes apart or use a sharp, clean knife to cut them. Each new section should have at least one or two "eyes." If you divide them in the fall, let the cut ends dry for an extra day before packing them away. Some gardeners like to dust the cuts with garden sulfur to prevent fungus, but in a dry storage environment, this is usually not necessary.

Storing Potted Cannas

If you grow your cannas in large pots or decorative containers, you have an even easier option. Once the frost has hit the leaves, cut the stems down to the soil line as you would with garden-grown plants.

Move the entire pot into a cool, dark, frost-free area like a basement or garage. Stop watering the pot completely. The canna bulbs will go dormant right where they are. This is a great "shortcut" for busy gardeners.

In the spring, about six weeks before the last frost, you can bring the pot back into a warm, sunny spot and begin watering again. The plant will "wake up" and start sending up new shoots. Every two or three years, you should still remove the plant from the pot to divide it and refresh the soil, as cannas can quickly become root-bound in containers.

Preparing for Spring Replanting

As winter begins to fade, it is time to start thinking about the upcoming growing season. About a month before your last expected frost date, you can check your rhizomes one last time. Healthy rhizomes will often start to show tiny white or pink nubs at the eyes, indicating they are ready to grow.

If you want an early start, you can "wake up" your cannas indoors. Plant the rhizomes in pots with some potting soil and place them in a warm, bright window. This gives them a head start so they are already several inches tall by the time the weather is warm enough to move them outside.

Wait to plant them in the garden until the soil is warm and there is no longer any danger of frost. Cannas love heat, so there is no rush. They will grow much faster in 60°F soil than in 50°F soil. When you do plant them, place them about 4 inches deep with the eyes pointing up. For a more detailed walkthrough, see How to Deep to Plant a Canna Bulb. With the energy they stored over the winter, they will take off quickly and fill your garden with color once again.

Encouragement for All Skill Levels

If you are new to storing bulbs and rhizomes, don't worry if you lose one or two over the winter. Even professional gardeners occasionally find a shriveled rhizome in their storage boxes. It is all part of the learning process. The vast majority of your cannas will likely make it through just fine if you keep them dry and cool.

Gardening is about the joy of the cycle. There is something very satisfying about pulling a box of dormant rhizomes out of a dark basement and seeing the first signs of green growth in the spring. It connects you to the seasons and makes the arrival of summer feel even more special.

We at Longfield Gardens, backed by our 100% Quality Guarantee, are proud to be part of your gardening journey. By taking these simple steps to dry and store your cannas, you are ensuring a beautiful, vibrant landscape year after year. It is a small investment of time that pays off in a big way when those tropical leaves begin to unfurl in the summer sun.

Conclusion

Storing canna lilies is a simple, effective way to keep your garden glowing with tropical color every summer. By waiting for the first frost, carefully lifting the rhizomes, and allowing them to cure, you set the stage for a successful winter rest. Whether you use peat moss, newspaper, or wood shavings, the goal is to provide a cool, dark, and stable environment.

• Wait for frost: Let the foliage turn brown to signal dormancy.
• Dry thoroughly: Cure rhizomes for 3–7 days before packing.
• Store cool: Keep temperatures between 40°F and 55°F.
• Check monthly: Remove any rot to protect the rest of the clump.

The effort you put in during the autumn months ensures a spectacular show next season. We invite you to explore our canna collection at Longfield Gardens to find even more varieties to add to your collection.

"Saving canna lilies is one of the easiest ways for a gardener to expand their landscape. Each year, your plants grow stronger and more numerous, making the spring planting season even more exciting."

FAQ

How long do canna lily bulbs need to dry before storage?

Canna rhizomes should be air-dried or "cured" for about 3 to 7 days in a well-ventilated, frost-free area. This allows the outer skin to toughen up and the cut ends to heal, which significantly reduces the risk of rot while they are in storage. Make sure they are spread out in a single layer during this time so air can reach all sides.

Can I store canna lily bulbs in a refrigerator?

It is generally not recommended to store canna rhizomes in a refrigerator. Most refrigerators are kept at 35°F to 38°F, which is slightly too cold for cannas and can cause tissue damage. Additionally, refrigerators are often very dry or contain ripening fruit that releases ethylene gas, which can interfere with the plant's dormancy and health.

What happens if I don't dig up my canna lilies?

If you live in USDA zone 7 or colder and leave your cannas in the ground, the freezing winter temperatures will likely kill the rhizomes. The water inside the fleshy stems will freeze and expand, causing the plant to turn into a mushy mess by spring. In these cooler zones, lifting and storing them indoors is necessary for the plants to survive.

Why are my stored canna rhizomes getting moldy?

Mold is usually a sign of too much moisture or poor air circulation. This can happen if the rhizomes weren't dried long enough before being packed away, or if they are stored in an airtight plastic container. If you see mold, wipe it off with a dry cloth, let the rhizomes air-dry for another day, and move them to a more breathable container like a cardboard box.