Introduction
There is nothing quite like the bold, architectural presence of canna lilies to transform a backyard into a lush, tropical oasis. Their vibrant flowers and dramatic foliage bring a sense of high-summer energy to any garden bed or patio container. Whether you have enjoyed a season of towering "Pretoria" blooms or the dark, moody leaves of "Australia," there comes a point in the year when your focus shifts from admiring their beauty to the practical task of removing canna lily bulbs.
At Longfield Gardens, we know that many of the most spectacular plants in our yards require a little extra attention as the seasons change. For those living in cooler climates, removing these "bulbs"—which are actually fleshy underground stems called rhizomes—is an essential part of the autumn routine to ensure they return even stronger next year. For others, removal might be about reclaiming a garden space or thinning out a patch that has become a bit too enthusiastic.
This guide is designed for home gardeners who want a clear, step-by-step path for lifting cannas efficiently and safely. We will cover the best timing for removal, the tools you need to make the job easy, and the specific techniques for both preserving your plants for winter and clearing them out for good. By following a few simple steps, you can handle this task with confidence and keep your garden looking its best throughout the transition into winter.
Determining Your Goal for Removing Canna Lilies
Before you grab your shovel, it is helpful to identify exactly why you are removing your canna lily bulbs. While the digging process is similar for most scenarios, your ultimate goal will dictate how much care you need to take during the extraction.
Removing for Winter Storage
In most parts of the United States, cannas are considered "tender perennials." This means they thrive in the heat but cannot survive a deep ground freeze. If you live in USDA Hardiness Zone 7 or colder, you will likely need to lift your cannas to keep them alive over the winter. In this scenario, the goal is to remove the rhizomes without damaging them, as cuts and bruises can lead to rot during the dormant months.
Removing for Division and Relocation
Sometimes a garden bed simply becomes too crowded. Cannas are vigorous growers, and a single rhizome planted in May can turn into a massive clump by October. Removing them allows you to divide the large clusters into smaller pieces, which you can then replant in other areas of your yard or share with fellow gardeners. This is a wonderful way to multiply your garden's beauty at no extra cost.
Permanent Removal
In warmer regions like the Deep South or parts of California, cannas can sometimes grow so well that they outstay their welcome. If you are looking to clear a space for new plantings, removing canna lily bulbs involves a more thorough excavation of the soil to ensure no small pieces of rhizome are left behind to sprout the following spring.
Key Takeaway: Understanding whether you are saving, sharing, or clearing your cannas will determine how much time and care you should invest in the digging process.
The Best Time for Removing Canna Lily Bulbs
Timing is often the secret to gardening success. While you could technically dig up cannas at any time, there are specific windows that make the process much easier on both you and the plant.
For those in cold climates, the "trigger" for removal is usually the first light frost of autumn. You will notice the large, tropical leaves turn black or a soggy brown after a night of freezing temperatures. This is actually a helpful sign! The frost signals to the plant that it is time to go dormant. Once the foliage has "died back," the energy from the leaves has traveled down into the rhizomes, charging them up with the nutrients they need for their long winter sleep.
Wait for a day when the soil is relatively dry if possible. Digging in heavy, wet mud is a strenuous chore and makes it much harder to clean the soil off the rhizomes. A crisp, sunny fall afternoon is the ideal setting for this task.
If you are removing cannas permanently or thinning them out in a warm climate where frost doesn't occur, you can do this almost any time during the dormant season (late fall through early spring). However, it is still easiest to do when the plants aren't in active, vigorous growth. For more guidance, see when to dig up canna lily bulbs.
Essential Tools for the Job
You do not need an arsenal of specialized equipment for removing canna lily bulbs. Most home gardeners will already have the necessary tools in their shed. Having the right items on hand will prevent unnecessary strain and protect the fleshy rhizomes from damage.
- Garden Spade or Shovel: A sharp, round-point shovel is excellent for cutting through soil and roots. If you are working in a tight space or a raised bed, a smaller garden spade might be easier to maneuver.
- Garden Fork: This is perhaps the most useful tool for removing cannas you intend to keep. The tines allow you to lift the soil and "sift" the rhizomes out without the risk of slicing through them with a flat blade.
- Hand Pruners or Loppers: These are used to cut back the thick, juicy stalks of the canna plants before you start digging.
- Garden Gloves: Canna stalks can be messy, and the soil can be abrasive. A sturdy pair of gloves will keep your hands clean and protected.
- Tarp or Wheelbarrow: If you are moving large amounts of soil or transporting clumps to a cleaning station, a tarp or wheelbarrow makes the transition much smoother.
- Hose with a Spray Nozzle: Essential for washing away the soil so you can see what you are working with.
Step-by-Step Guide to Lifting Canna Rhizomes
Removing canna lily bulbs is a physical task, but it doesn't have to be an overwhelming one. By breaking it down into smaller steps, you can move through even a large patch of lilies in a single afternoon.
Step 1: Cut Back the Foliage
Before you touch the soil, clear away the top growth. Use your pruners or loppers to cut the stalks down to about 4 to 6 inches above the ground. This leaves you with a "handle" to hold onto while you dig, but removes the bulk of the messy leaves. If the leaves have been hit by frost, they may be slippery, so work carefully.
Step 2: Loosen the Soil
One of the most common mistakes is digging too close to the center of the plant. Canna rhizomes grow horizontally and can spread out quite far from the main stalk. To avoid piercing the "bulbs," start your digging circle about 10 to 12 inches away from the base of the stems.
Insert your garden fork or shovel deep into the soil. Lean back on the handle to pry the soil upward. Work your way around the entire clump, loosening the earth as you go. You want the entire mass of rhizomes to feel "loose" before you attempt to lift it out.
Step 3: Lift the Clump
Once the soil is loose, slide your tool under the center of the clump and lift. If the patch is very large, you may need to lift it in sections. For those removing canna lily bulbs to save them, try to keep the clump as intact as possible at this stage to prevent snapping the growing "eyes" off the rhizomes.
Step 4: Shake and Clean
Lift the clump out of the hole and give it a gentle shake to remove large clods of dirt. If you are working in heavy clay soil, the dirt might cling tightly. This is where a garden hose comes in handy. Use a gentle spray to wash away the remaining soil. Cleaning the rhizomes makes it much easier to see where to make divisions and allows you to inspect the health of the plant.
Step 5: Inspection
As you clean the rhizomes, look for any signs of soft spots, mold, or insect damage. Healthy canna rhizomes should feel firm, similar to a fresh potato or ginger root. If you find any mushy sections, trim them away with a clean knife.
What to do next:
- Clear a flat workspace, such as a garden table or a piece of plywood.
- Gather your cleaned rhizomes and categorize them by variety if you have more than one.
- Prepare a labeling system (like masking tape and a permanent marker) so you don't forget which colors are which over the winter.
Dividing Canna Rhizomes During Removal
If you are removing canna lily bulbs for storage, this is the perfect time to divide them. Over a single growing season, a small rhizome can produce a massive, tangled crown. Dividing helps keep the plants vigorous and prevents them from becoming "root-bound" in the garden bed.
Look for the natural "joints" in the rhizome clump. You will see individual sections that each have at least one or two "eyes" (small, pointed bumps where next year's stems will emerge). You can usually snap these apart by hand, or use a sharp, sterilized knife to cut them into manageable pieces.
Each piece you save should be about the size of a large potato and have at least two healthy eyes. If you cut the rhizomes, it is a good idea to let them sit in a dry, shaded area for a day or two so the "wounds" can callus over. This simple step significantly reduces the risk of rot during storage. For additional guidance, read this step-by-step canna winterizing guide.
How to Remove Cannas Permanently
If your goal isn't storage but rather getting rid of a patch of cannas that has become invasive or unwanted, your approach should be a bit more aggressive. Cannas are survivors; if you leave even a small piece of a rhizome in the ground, it is very likely to sprout again in the spring.
The Deep Dig Method
When removing canna lily bulbs permanently, you must go deep. Use a sharp shovel to turn over the soil to a depth of at least 12 to 18 inches. Sift through the loosened soil by hand or with a garden fork to find every piece of fleshy root.
One common question gardeners ask is whether the thin, hair-like roots need to be removed as well. The answer is generally no. These thin roots are for water and nutrient uptake; they do not contain the genetic material or energy stores required to create a new plant. Only the thick, fleshy rhizomes (the "bulbs") can sprout new growth. However, small "nubbins" or offshoots of the rhizome can be easy to miss, so be as thorough as possible.
The Smothering Method
If digging isn't an option or if you have a massive area to clear, you can use the smothering technique. After cutting the foliage to the ground, cover the area with a thick layer of cardboard or several layers of newspaper. Weigh this down with 3 to 4 inches of mulch. By blocking out all light and air, you eventually starve the rhizomes. This process takes time—often an entire growing season—but it is a low-effort way to reclaim a garden bed.
Proper Storage for Your Lifted Cannas
For those who have successfully removed their cannas and want to enjoy them again next spring, storage is the final and most important step. Think of this as putting your plants in a "pantry" where they can stay cool and hydrated without getting wet or freezing.
The Curing Process
As mentioned earlier, let your cleaned rhizomes air dry in a frost-free location for 24 to 48 hours. This hardens the outer skin. Do not leave them in direct, hot sunlight, as they can shrivel. A garage, shed, or covered porch is perfect.
Choosing a Packing Material
To keep the rhizomes from drying out completely, you should pack them in a medium that holds just a tiny bit of moisture. Popular choices include:
- Peat Moss: Lightweight and excellent at regulating moisture.
- Vermiculite or Perlite: Provides great aeration.
- Shredded Newspaper: A great recycled option that is very breathable.
- Sawdust or Wood Shavings: Often available at pet stores.
The Storage Container
Place your packing material in a cardboard box, a plastic bin with air holes drilled in the sides, or a mesh bag. Layer the rhizomes so they aren't touching each other. This prevents a single spoiled piece from affecting the whole batch.
Store the container in a cool, dark, and dry place. The ideal temperature is between 40°F and 50°F. An unheated basement, a crawl space, or a "cool" closet usually works well. Avoid areas that drop below freezing, such as an uninsulated metal shed, as freezing temperatures will turn the rhizomes into mush.
Mid-Winter Check-ins
It is a good habit to check on your stored cannas once a month. If they look shriveled and dry, mist the packing material slightly with a spray bottle. If you find any pieces that have become soft or moldy, remove them immediately to keep the rest of the batch healthy. This canna winter storage guide offers another storage reference.
Removing Container-Grown Cannas
Growing cannas in pots is a popular choice for smaller gardens or for adding height to a patio. Removing them from containers is often much easier than digging them out of the ground.
If you have a large pot, you can simply cut the foliage back after the first frost and move the entire container into a frost-free area like a garage. The soil in the pot acts as a natural insulator. In the spring, you can dump the pot out, divide the rhizomes, and replant them with fresh soil.
If you need the pot for winter decor, follow the same steps as garden removal: tip the pot over, gently pull the clump out, shake off the potting mix, and store the rhizomes in a box of peat moss. Because potting soil is usually much lighter than garden soil, this is a very quick and clean process. For more ideas, browse the tall cannas collection.
Common Challenges and Realistic Expectations
Gardening is a partnership with nature, and while removing canna lily bulbs is generally a straightforward task, there are a few things to keep in mind.
First, remember that weather plays a huge role. If you have an unusually wet autumn, your rhizomes might be muddier and take longer to dry. If an early, unexpected hard freeze occurs before you can get them out, don't panic. The ground usually stays warmer than the air for a few days. As long as the soil itself hasn't frozen solid, the rhizomes are likely still fine.
Second, be prepared for the sheer volume of plants. Cannas are incredibly productive. You might start the year with five rhizomes and end with twenty. Have extra boxes or bags ready for the "harvest."
Finally, understand that some varieties are more vigorous than others. Large-flowered, green-leaved varieties often produce more rhizomes than some of the highly variegated or dwarf types. Don't be discouraged if one variety yields a bucketful of bulbs while another only gives you a few; this is a natural variation in how different plants grow.
Caring for Your Garden Bed After Removal
Once the cannas are gone, you have a blank canvas. This is a great time to give back to your soil. If you've been growing cannas in the same spot for a few years, they have likely used up a good deal of nutrients.
We recommend raking the area smooth and adding a layer of compost or well-rotted manure over the winter. This allows the nutrients to seep into the ground, preparing a rich environment for whatever you decide to plant next spring. If you are in a region where the ground doesn't freeze, you might even consider planting a "cover crop" or some cool-season annuals like pansies to keep the soil active and prevent erosion.
Key Takeaway: Post-removal care is about soil health. Adding organic matter now ensures a vibrant and successful garden in the upcoming season.
Conclusion
Removing canna lily bulbs doesn't have to be a stressful chore. Whether you are tucking them away for a winter nap or clearing space for a brand-new garden design, the process is a rewarding way to wrap up the growing season. By timing your work with the first frost, using the right tools to protect the rhizomes, and storing them in a cool, dry place, you set yourself up for continued success.
At Longfield Gardens, we believe that every step of the gardening cycle—from the first sprout of spring to the final cleanup of autumn—is an opportunity to connect with your outdoor space. Taking the time to properly care for your cannas now means you will be rewarded with those same tropical, sun-loving blooms for many years to come.
- Wait for the first frost to signal dormancy.
- Dig wide and deep to avoid damaging the fleshy rhizomes.
- Clean and cure the "bulbs" before packing them in breathable material.
- Check your stored plants monthly to ensure they stay healthy.
"The end of the season is simply the preparation for a new beginning. Handling your canna rhizomes with care today ensures a burst of tropical color tomorrow."
Ready to plan for next year? Explore our assorted canna collection and spring-planted summer-blooming bulbs to find the perfect companions for your garden.
FAQ
Can I leave canna lily bulbs in the ground all winter?
This depends on your location. If you live in USDA Zones 8 through 11, cannas can typically stay in the ground year-round with a layer of mulch for protection. However, in Zones 7 and colder, the ground will freeze deep enough to kill the rhizomes, so they must be removed and stored indoors to survive. Check the Hardiness Zone Map to identify your growing zone.
Do I have to remove all the tiny roots when digging up cannas?
No, you do not need to worry about the thin, stringy roots. These are feeder roots and cannot grow into new plants. The only part that needs to be removed is the thick, fleshy rhizome (the "bulb"). As long as you get all the pieces of the rhizome out of the soil, the plant will not grow back in that spot. For more background, see how canna root systems work.
What should I do if my canna rhizomes look shriveled during winter storage?
If the rhizomes look very dry or shriveled, it means the storage environment is too dry. Use a spray bottle to lightly mist the packing material (like peat moss or sawdust). You want it to be barely damp, not wet. This provides just enough humidity to keep the rhizomes plump without causing them to rot. The canna winter care guide provides additional storage advice.
When is it safe to replant the cannas I've removed?
Wait until the danger of frost has passed and the soil has warmed up in the spring. In most regions, this is around the same time you would plant tomatoes. If you want a head start, you can "wake them up" by planting them in pots indoors about 4 to 6 weeks before the last frost date. Review the canna growing guide for additional planting guidance.
