How to Lift Canna Bulbs for Winter Storage

Table of Contents

1. Introduction
2. Why Lifting Canna Bulbs is Necessary
3. Timing the Lift: The First Frost Signal
4. Tools You Will Need
5. Step 1: Cutting Back the Foliage
6. Step 2: Digging and Lifting the Rhizomes
7. Step 3: Cleaning and Inspecting the Bulbs
8. Step 4: Dividing the Clumps (Optional)
9. Step 5: Curing the Canna Bulbs
10. Choosing Your Storage Method
11. Ideal Storage Conditions
12. Lifting Cannas Grown in Containers
13. Winter Maintenance and Monitoring
14. Realistic Expectations for Success
15. Preparing for Spring
16. Conclusion
17. FAQ

Introduction

The bold, tropical colors and statuesque foliage of cannas are often the crowning glory of a summer garden. These plants bring a sense of high-summer energy to borders and containers, blooming with a tropical flair that few other perennials can match. At Longfield Gardens, we believe that the joy of growing cannas should last for years, not just one season.

While cannas thrive in the heat, they are tender plants that cannot survive freezing temperatures in most northern climates. Learning how to lift canna bulbs (which are technically called rhizomes) is a simple and rewarding skill that allows you to preserve your favorite varieties for next year. This process is straightforward and keeps your garden journey going from one year to the next.

This guide will walk you through the entire process of lifting cannas, from the first frost to the final storage box. Whether you are a beginner or an experienced gardener, these steps will help you protect your investment and enjoy even bigger, more beautiful blooms next summer. Saving your cannas is a practical way to expand your garden while ensuring your plants stay healthy and vibrant.

Why Lifting Canna Bulbs is Necessary

Cannas are native to tropical and subtropical regions. This means they love the sun and warm soil, but they lack the natural defenses to handle a frozen winter. In USDA hardiness zones 8 and warmer, cannas can often stay in the ground year-round with a bit of mulch for protection. However, for those of us in zones 7 and colder, the freezing ground will cause the fleshy rhizomes to rot and die.

Lifting the bulbs is the process of digging them up and moving them to a frost-free environment for the winter. This mimics their natural dormant cycle while keeping them safe from the ice and snow. It is a cost-effective way to keep your garden looking its best without having to buy new plants every spring.

Another benefit of lifting is the opportunity to check on the health of your plants. Over a single growing season, a small canna rhizome can grow significantly and produce several "offshoots." When you lift them, you can see this growth firsthand and even divide the clumps to create new plants for free. For a bigger show, browse Tall Cannas.

Key Takeaway: Lifting canna bulbs is essential in cold climates to prevent the rhizomes from freezing. It also allows you to multiply your plant collection through easy division.

Timing the Lift: The First Frost Signal

Timing is everything when it relates to lifting cannas. You want to give the plants as much time as possible to store energy for next year, but you must act before the ground freezes solid. The best signal to start the process is the first light frost of autumn.

When a light frost hits, you will notice the lush green or bronze foliage of your cannas turns black or brown almost overnight. This might look disappointing, but it is actually a helpful "off switch" from nature. The frost tells the plant that the growing season is over and it is time to move its energy down into the rhizome.

We recommend waiting for this first frost before you reach for your shovel. This ensures the rhizome has reached its maximum size and strength for the winter. However, do not wait for a "hard freeze" where the ground itself begins to crust over. A deep freeze can penetrate the soil and damage the rhizomes, leading to rot during storage.

What if Frost is Late?

In some years, frost might stay away longer than usual. If the weather is cooling down significantly and your foliage is still green but the calendar says it is late autumn, you can still proceed. Simply cut the stalks down manually to signal the start of the dormant period.

Steps to Take Before the First Frost

• Identify and label your canna varieties while they are still in bloom.
• Gather your storage supplies (boxes, peat moss, or newspaper) so you are ready when the weather turns.
• Check your local weather forecast daily once October arrives.

Tools You Will Need

Lifting cannas does not require specialized machinery, but having the right hand tools will make the job much easier and safer for the plants. The goal is to remove the rhizomes from the soil without slicing or bruising them.

• Garden Fork: This is often better than a shovel because the tines can loosen the soil around the rhizomes without cutting through them.
• Sturdy Shovel or Spade: Useful if your soil is particularly heavy or compacted.
• Pruning Shears: You will need these to cut back the heavy stalks.
• Garden Hose: A gentle spray helps remove excess soil so you can see what you are doing.
• Gloves: Canna stalks can be juicy and messy, so a good pair of garden gloves is helpful.
• Labels and Markers: To ensure you know which color is which when spring arrives.

Step 1: Cutting Back the Foliage

The first physical step in lifting canna bulbs is removing the top growth. Once the frost has blackened the leaves, the foliage is no longer helping the plant. Removing it makes the digging process much cleaner and allows you to see exactly where the base of the plant is.

Use your pruning shears to cut the stalks down to about 2 to 4 inches above the soil line. Leaving a small "handle" of stalk is actually very helpful. It gives you something to hold onto while you lift the clump, and it helps you identify which side of the rhizome is "up" later on.

Dispose of the blackened foliage in your compost pile, provided the plants were healthy and free of pests during the summer. If you noticed any disease or significant insect damage, it is better to discard the foliage in the trash to prevent those issues from returning next year.

Step 2: Digging and Lifting the Rhizomes

Now that the stalks are trimmed, it is time to get the rhizomes out of the ground. Canna rhizomes grow horizontally and can spread quite far from the original planting spot. If you dig too close to the stem, you risk cutting the fleshy roots in half.

To avoid damage, start by inserting your garden fork or shovel into the soil about 10 to 12 inches away from the base of the stalks. Push the tool straight down and gently rock it back and forth to loosen the earth. Work your way in a circle around the entire plant.

Once the soil is loose, use the tool as a lever to lift the entire clump upward. You may be surprised at how large and heavy the root mass has become! If the clump is too heavy to lift all at once, you can gently break it into smaller sections with your hands while it is still in the hole.

What to Do Next:

• Clear a workspace on a lawn or patio where you can inspect the bulbs.
• Gently shake the clump to remove large chunks of soil.
• Use your fingers to poke away dirt from the crevices between the rhizomes.

Step 3: Cleaning and Inspecting the Bulbs

Once the cannas are out of the ground, they need a bit of cleaning. You don't need to make them spotless, but removing the majority of the soil helps prevent rot and makes them easier to store.

Many gardeners prefer to use a garden hose with a gentle spray to wash away the remaining dirt. This allows you to see the health of the rhizomes clearly. Look for "eyes"—the small, pointed buds that will become next year’s stems.

While cleaning, perform a quick health check. A healthy canna rhizome should feel firm, similar to a fresh ginger root or a potato. If you find any parts that are soft, mushy, or smell bad, these are signs of rot. Use a clean, sharp knife to trim away any damaged sections. If a whole rhizome is soft, it is best to discard it so the rot doesn't spread to your healthy ones.

Step 4: Dividing the Clumps (Optional)

One of the best things about cannas is how much they multiply. If you started the spring with one small rhizome, you might end the fall with a clump the size of a basketball. You can divide these clumps now or wait until spring. If you want a slightly smaller, easy-to-manage planting, browse Medium Cannas.

If you choose to divide them now, look for natural "joints" in the rhizome. You can usually snap them apart with your hands or use a knife to cut them. Each division must have at least one or two "eyes" (the growing points) to produce a plant next year.

At our trial garden, we often find that leaving the clumps slightly larger (with 3 to 5 eyes) leads to a much more impressive display in the first year of replanting. If you do make cuts, you can dust the raw edges with an anti-fungal powder or simply let them sit in a dry spot for an extra day to "callus" over before storage. For more on the process, see How Do You Separate Canna Bulbs for More Flowers?.

Step 5: Curing the Canna Bulbs

Curing is a vital step that many people skip. "Curing" simply means letting the rhizomes dry out slightly in a protected area before they go into long-term storage. This process allows the "skin" of the rhizome to toughen up, which acts as a barrier against mold and dehydration.

Place your cleaned rhizomes in a single layer on a tray, a piece of cardboard, or a screen. Keep them in a warm, dry, and well-ventilated area for about 4 to 7 days. A garage, a shed, or even a covered porch works well, as long as the temperature stays above freezing.

Avoid placing them in direct, harsh sunlight, which can dry them out too quickly. You want the surface to be dry to the touch and any cut ends to look "healed" and firm. Once they are cured, they are ready for their winter nap. For a fuller walkthrough, see How to Keep Canna Bulbs Over Winter.

Choosing Your Storage Method

There are several successful ways to store canna bulbs. The goal for all of them is the same: keep the bulbs cool (but not freezing), dark, and slightly insulated so they don't dry out completely.

The Box and Peat Moss Method

This is a favorite for many home gardeners. Place a layer of peat moss, vermiculite, or sawdust in the bottom of a cardboard box. Lay the rhizomes on top so they aren't touching each other. Cover them with more of the material and repeat the layers. The peat moss helps regulate moisture, absorbing excess dampness while preventing the bulbs from shriveling.

The Newspaper Wrap

If you don't have peat moss, newspaper is an excellent alternative. Wrap each individual rhizome or small clump in several layers of dry newspaper. Place the bundles inside a cardboard box or a breathable paper bag. The paper provides insulation and prevents any rot from spreading from one bulb to another.

The Plastic Bag Method

Some gardeners have success using plastic grocery bags or bin liners. If you use plastic, it is crucial to keep the bag slightly open or poke several holes in the sides. Without airflow, moisture will build up and cause the bulbs to rot. Adding a handful of slightly damp peat moss inside the bag can help maintain the perfect balance.

Key Takeaway: The best storage method is the one that keeps your bulbs between 40°F and 50°F in a breathable container with a dry medium like peat moss or newspaper.

Ideal Storage Conditions

Once your cannas are packed, you need to find the right "home" for them for the next few months. The environment should be:

• Cool: Aim for a temperature between 40°F and 55°F. This is cold enough to keep the plant dormant but warm enough to prevent tissue damage.
• Dark: Light can signal the plant to start growing too early.
• Dry: Avoid damp basements where mold can thrive.

Ideal locations include an unheated basement, a crawl space, or a cool closet. If you use a garage, make sure the box is kept away from exterior walls where temperatures might drop too low during a cold snap.

Avoid storing bulbs near large appliances that vent heat, or in attics that might fluctuate wildly in temperature. Consistency is the secret to a high survival rate.

Lifting Cannas Grown in Containers

If you grow your cannas in pots, the process of lifting is even easier. You have two main options depending on how much storage space you have. For compact patio options next season, browse Short Cannas.

The first option is to follow the steps above: cut back the foliage, tip the pot over, and harvest the rhizomes from the soil. This is best if you need the pot for winter decor or if the plant has become "root-bound" and needs to be divided.

The second option is to store the canna right in its pot. Once the foliage has been hit by frost, cut it back to the soil line. Move the entire container to a cool, frost-free location like a basement. Stop watering the pot completely. The dry soil will act as the storage medium for the rhizomes. In the spring, you can bring the pot back into the light, give it a fresh layer of compost and water, and it will begin to grow again.

Winter Maintenance and Monitoring

Gardening doesn't completely stop in the winter; it just moves indoors. We recommend checking on your stored canna bulbs about once a month. This quick check takes only a few minutes but can save your entire collection.

Open your boxes and feel a few of the rhizomes. If you see any signs of fuzzy mold or soft spots, remove those specific pieces immediately so the problem doesn't spread. If you'd like help spotting problems, see How to Tell if Canna Bulbs are Good.

If the rhizomes feel very light and look shriveled, they might be getting too dry. You can use a spray bottle to lightly mist the storage medium (the peat moss or newspaper). You don't want it wet—just "barely damp" to the touch. Most of the time, however, they are best left alone in their dry environment.

Realistic Expectations for Success

While we want every gardener to have a 100% success rate, it is normal to lose a few bulbs over the winter. Factors like the humidity in your home, the exact temperature of your storage spot, and the health of the plant at the end of the summer all play a role.

Experienced gardeners are usually very happy with an 80% to 90% survival rate. If a few bulbs don't make it, don't be discouraged. The ones that do survive will often be much larger than they were the previous year, more than making up for any losses.

Remember that gardening is a partnership with nature, and weather patterns can vary. If you have a particularly wet autumn followed by a very humid winter, you might need to check your bulbs for rot more frequently. If your winter is exceptionally dry, you might need that spray bottle more often.

Preparing for Spring

As the days get longer and the threat of frost fades, you will start to see the "eyes" on your stored rhizomes beginning to swell or even turn a light green. This is an exciting sign that your cannas are ready for a new year!

About 4 to 6 weeks before your last expected frost date, you can "wake up" your cannas by bringing them into a warmer room with some light. Many people like to pot them up indoors at this stage to give them a head start on the season. This is especially helpful in northern states with short summers, as it ensures you get blooms earlier in the year.

When you are ready to replant, treat your saved rhizomes just like new ones. Plant them about 4 inches deep in well-drained soil once the ground has warmed up to at least 60°F. For a planting refresher, see How Deep to Plant a Canna Bulb.

Conclusion

Lifting canna bulbs is one of those classic gardening tasks that feels more difficult than it actually is. By following these simple steps—waiting for the frost, digging carefully, curing properly, and storing in a cool spot—you can enjoy the tropical beauty of your cannas year after year. It is a rewarding way to connect with the cycle of the seasons and ensure your garden remains a vibrant, colorful sanctuary.

At Longfield Gardens, we take pride in providing high-quality plants like Canna Tall Tropicanna that bring joy to your outdoor spaces. By taking these small steps to care for your cannas over the winter, you are setting the stage for a spectacular display next summer.

• Wait for the first frost to signal dormancy.
• Cure the rhizomes for a week to toughen the skin.
• Store in a cool, dark, and dry place.
• Check your bulbs monthly for any signs of rot.

"Preserving your cannas is a simple way to carry the warmth of summer through the winter months, ensuring a magnificent return of color when the sun returns."

Ready to plan next year's garden? Visit us at Longfield Gardens to find the perfect companions for your saved cannas, and consider Canna Tall Pretoria for next season.

FAQ

When is the best time to lift my canna bulbs?

The ideal time to lift canna bulbs is shortly after the first light frost in the fall has turned the foliage brown or black. This frost serves as a natural signal for the plant to go dormant, but you should ensure you dig them up before the ground freezes solid, which can damage the rhizomes.

Do I need to wash the dirt off the rhizomes before storing them?

While you don't need to make them perfectly clean, removing the majority of the soil is recommended. You can gently shake the clumps or use a garden hose to spray off heavy dirt, which allows you to inspect the rhizomes for rot or pests and makes them easier to handle during storage.

How do I prevent my canna bulbs from rotting during the winter?

The best way to prevent rot is to "cure" the bulbs by letting them air-dry in a well-ventilated area for about a week before packing them away. Additionally, store them in a breathable medium like dry peat moss or newspaper and check them monthly to remove any pieces that show signs of soft spots or mold.

What temperature should I store my canna bulbs at?

Canna bulbs should be stored in a cool, dark place where the temperature stays consistently between 40°F and 50°F. An unheated basement, a crawl space, or a cool closet are usually perfect locations, as long as the temperature does not drop below freezing.