Introduction
The sight of a canna lily unfurling its massive, tropical leaves is one of the true highlights of the summer garden. These plants bring an undeniable energy to the landscape, with vibrant blooms and foliage that makes any backyard feel like a private island retreat. If you have fallen in love with their bold presence, it is only natural to wonder if you can enjoy that beauty again next year.
At Longfield Gardens, we want to help you get the most out of every plant in your yard. The good news is that canna lilies are perennials, meaning they are designed by nature to return season after season. However, because they are native to warm, tropical climates, whether they grow back for you depends on your local weather and how you care for them during the winter months.
This guide will explain exactly how to ensure your cannas return with even more vigor next year. We will cover the lifecycle of the plant, how to protect it from the cold, and the simple steps you can take to wake it up in the spring.
Cannas are resilient plants that want to grow, and with a little bit of knowledge, you can keep them part of your garden family for years to come.
Understanding the Canna Lily Life Cycle
To answer the question of whether your canna lily will grow back, it helps to understand how the plant actually functions. Cannas grow from thick, fleshy underground stems called rhizomes. You can think of the rhizome as the plant's battery or storage tank. During the summer, the leaves soak up sunlight and turn it into energy, which is then stored in the rhizome for the following year.
In their native tropical environments, cannas grow almost year-round. In the United States, they follow a seasonal pattern. When the weather turns cold in the autumn, the green foliage will naturally begin to yellow or turn brown. This is the plant’s way of saying it is time to rest. Even though the parts above the ground look like they are finished, the rhizome underground is still very much alive and waiting for the return of warm weather.
Whether that rhizome survives to grow back depends entirely on the temperature of the soil. If the soil stays warm enough throughout the winter, the rhizome stays healthy. If the ground freezes solid where the rhizome is sitting, the plant may not survive. This is why gardeners in different parts of the country handle their cannas in different ways.
Will It Grow Back in My Zone?
The USDA Plant Hardiness Zone Map is the best tool for determining if your cannas can stay in the ground. Cannas are generally considered hardy in zones 7 through 10. In these warmer regions, the ground rarely freezes deep enough to reach the rhizomes, and the plants will reliably grow back on their own every spring.
If you live in zones 3 through 6, the winter temperatures are usually too low for the rhizomes to survive outdoors without help. In these areas, cannas are treated as "tender perennials." This does not mean they cannot grow back; it just means they need a cozy place to stay until the spring.
The timing for their return also depends on your local climate. Cannas are famous for being "late sleepers." They love heat and will not start growing until the soil is consistently warm, usually around 60°F. If your other perennials are sprouting in April but your cannas are still hidden, do not worry. They are likely just waiting for the summer sun to warm the earth.
How to Help Your Cannas Grow Back in Warm Climates
If you live in Zone 7 or warmer, your cannas are very likely to grow back with minimal effort. However, a few simple steps can help them return even stronger and more beautiful.
Cutting Back the Foliage
Once the first frost hits, the leaves of your canna lily will turn black or brown. This is the perfect time to tidy up the garden. Use a clean pair of garden shears to cut the stems down to about 2 to 4 inches above the soil line. Removing the old, dead foliage helps prevent pests from nesting in the debris over the winter.
Adding a Layer of Protection
Even in warm zones, an unexpected cold snap can happen. Applying a thick layer of mulch over the area where your cannas are planted is a great insurance policy. Use about 4 to 6 inches of straw, shredded leaves, or bark mulch. This acts like a blanket, keeping the soil temperature stable and protecting the "eyes" or growth points on the rhizomes.
Ensuring Good Drainage
Drainage refers to how fast water leaves the soil. While cannas love water during the growing season, they do not like to sit in soggy, cold soil during their dormant winter rest. If your garden spot tends to collect puddles in the winter, the rhizomes might rot. Planting them in a slightly raised bed or adding organic matter to the soil can help ensure they come back healthy in the spring.
Key Takeaway: In warm climates, cannas are low-maintenance survivors. Cut them back after the first frost and add a layer of mulch to ensure a successful return in the spring.
Saving Your Cannas in Cold Climates
For gardeners in colder northern states, the answer to "will my canna lily grow back" depends on a process called lifting. Since the ground will freeze in these areas, you must move the rhizomes to a frost-free location for the winter. This is a very rewarding process because canna rhizomes often multiply, meaning you will have even more plants to enjoy next year.
When to Lift the Rhizomes
Wait until the first frost has nipped the foliage. The leaves will wilt and turn dark, signaling that the plant has moved its energy down into the roots. Once this happens, you can begin the lifting process. It is often easier to do this on a dry day when the soil is not too muddy.
The Lifting Process
- Cut the stems: Trim the stalks down to about 3 or 4 inches.
- Dig carefully: Use a garden fork or spade to gently loosen the soil around the clump. Start digging about a foot away from the main stem to avoid slicing the rhizomes.
- Lift and shake: Gently lift the clump out of the ground. Shake off the excess soil. You do not need to wash them; a little bit of dirt is fine.
- Inspect: Look for any soft or mushy spots. Healthy rhizomes should feel firm, similar to a potato.
Curing and Storage
Before putting your cannas away for the winter, they need to "cure." Place them in a dry, shaded area like a garage or shed for a few days. This allows the outer skin to toughen up slightly, which prevents rot during storage.
Once cured, place the rhizomes in a box or a breathable bag. Many gardeners use slightly damp peat moss, vermiculite, or even shredded newspaper to surround the roots. This keeps them from drying out completely without making them wet. Store the box in a cool, dark place that stays between 40°F and 50°F. A basement or a crawl space is usually perfect.
For a detailed walkthrough, see this guide to overwintering canna bulbs.
Waking Up Your Cannas in the Spring
When the days start to get longer and the birds begin to sing, it is time to think about your cannas. If you stored them over the winter, you have a few choices on how to get them growing again.
Starting Indoors for an Early Bloom
Because cannas love heat, they can be slow to start in northern gardens. You can give them a head start by "potting them up" indoors about 4 to 6 weeks before the last frost date.
- Place the rhizome in a pot with high-quality potting soil.
- The "eyes" or sprouts should be pointing upward.
- Cover with 1 to 2 inches of soil and water lightly.
- Keep the pot in a warm, sunny window or under a grow light.
By the time the weather is warm enough to plant outside, you will already have a healthy green plant ready to take off. This often leads to earlier flowers and a more impressive display in the summer.
Planting Directly in the Garden
If you prefer to plant directly into the ground, patience is the most important rule. Wait until the danger of frost has passed and the soil is warm. If you plant them too early in cold, wet soil, the rhizomes may sit dormant for a long time or potentially rot before they get the chance to grow. Aim for the same time you would plant your tomatoes or peppers.
For more detail, read this guide to planting depth for canna lily rhizomes.
What to Do Next
If you are ready to ensure your cannas return year after year, here is a quick checklist for your next steps:
- Identify your zone: Check a hardiness zone map to see if your cannas can stay in the ground or if they need to be moved inside.
- Monitor the weather: Watch for the first frost of autumn to know when to cut back the foliage.
- Prepare your storage: If you live in a cold area, gather some boxes and peat moss so you are ready to lift the roots when the time comes.
- Plan your spring start: Decide if you want to start your plants indoors for a head start or wait for the natural warmth of the garden.
What to do next: Once the first frost hits, cut your canna stems to 4 inches. If you are in a cold zone, dig them up within a week. If you are in a warm zone, apply your winter mulch immediately.
Why a Canna Might Not Grow Back
Sometimes, despite our best efforts, a plant does not return. If your canna lily fails to grow back, it is usually due to one of three simple factors. Understanding these can help you succeed next season.
The Soil Was Too Cold
This is the most common reason. If a rhizome freezes, the water inside the cells expands and breaks the cell walls, turning the firm root into a mushy mess. If you find your rhizomes are soft and watery in the spring, they likely got too cold. In the future, try digging them up earlier or using a thicker layer of mulch.
The Soil Was Too Wet
While cannas love moisture when they are actively growing, they need to stay relatively dry when they are sleeping. If the winter was exceptionally rainy and your soil does not drain well, the rhizome may have succumbed to rot. Adding compost to your garden beds can improve the soil structure and help water move through more easily.
Lack of Heat in Spring
If your canna has not appeared by late May or early June, it might just be waiting for more heat. Southern gardeners will see growth much earlier than northern gardeners. Before you give up on a canna, try placing a piece of clear plastic over the soil for a few days. This can help trap solar heat and "wake up" the rhizome.
Growing Cannas in Containers
Growing cannas in pots is a wonderful way to enjoy them, especially if you have a patio or balcony. It also makes the process of ensuring they grow back even easier.
When the frost arrives, you do not necessarily have to dig the rhizomes out of the pot. Instead, you can simply cut the foliage back and move the entire container into a frost-free area like a basement or garage. Stop watering the pot for the winter. In the spring, move the pot back into the sun, give it a good soak, and the plant will begin its new cycle of growth.
Every two or three years, it is a good idea to refresh the soil and divide the rhizomes. Cannas are vigorous growers, and they can quickly become "root-bound" in a pot. Dividing them gives the roots more room to breathe and provides you with more plants to place in other parts of your garden.
For more container-care advice, see growing cannas in pots.
Choosing the Right Varieties for Success
At Longfield Gardens, we offer a wide range of canna lilies, from the classic tall varieties to dwarf types that are perfect for containers. Some varieties, like Tropicanna, are prized for their colorful striped foliage, while others, like 'Richard Wallace' or The President, are known for their massive, brilliant blooms.
Choosing a variety that fits your space is key. If you have a small garden, a dwarf variety will be much easier to manage when it comes time to lift and store the roots. If you have a large border that needs a dramatic focal point, the taller varieties can reach six feet or more in a single season. Regardless of which variety you choose, the care steps remain the same.
Conclusion
Canna lilies are some of the most rewarding plants you can grow. Their ability to transform a backyard into a lush paradise is unmatched, and the fact that they can grow back year after year makes them a fantastic investment for any gardener. Whether you live in a sunny southern climate or a chilly northern one, these plants are more than capable of returning to dazzle you with their colors.
By understanding your hardiness zone and giving your cannas a little bit of winter protection, you can ensure they remain a staple of your summer landscape. We are proud to help you succeed in your gardening journey, and we stand behind the quality of every bulb and rhizome we ship from our facility in New Jersey.
Gardening is a journey of discovery, and seeing those first green canna shoots poke through the soil in the spring is one of the most satisfying moments a gardener can experience.
"The secret to canna success is matching your winter care to your climate. With just a few minutes of effort in the fall, you can enjoy a lifetime of tropical beauty in your own backyard."
Ready to add more drama to your garden? Explore the Canna Assorted Collection at Longfield Gardens and find the perfect bold colors to make your landscape shine next season.
FAQ
How long does it take for cannas to grow back in the spring?
Cannas are heat-loving plants and are often one of the last things to emerge in the garden. They typically wait until the soil temperature reaches a consistent 60°F. Depending on your location, this might be anywhere from late April in the South to mid-June in the North.
Can I leave my canna lilies in the ground during winter?
This depends entirely on your USDA hardiness zone. If you live in Zone 7, 8, 9, or 10, you can usually leave them in the ground with a layer of mulch. If you live in Zone 6 or colder, the rhizomes will likely freeze and die unless they are lifted and stored indoors.
My canna foliage turned black after a frost; is it dead?
No, the black or brown foliage is a natural reaction to the cold and does not mean the plant is dead. The rhizome underground is likely still healthy. Simply cut away the damaged foliage to a few inches above the ground and either mulch the area or dig up the roots for storage.
Why didn't my canna lily come back this year?
The most common reasons for a canna not returning are the rhizome freezing during winter or rotting in overly wet soil. If the roots feel mushy or hollow, they have likely perished. If they still feel firm, they may simply be waiting for hotter weather to begin their spring growth.
