Will Canna Lilies Grow Back Every Year?

Table of Contents

1. Introduction
2. The Short Answer to Their Longevity
3. Understanding How Canna Lilies Grow
4. The Role of USDA Hardiness Zones
5. How to Help Cannas Grow Back in Warm Climates
6. The Art of Overwintering in Cold Climates
7. Starting Your Cannas Again in the Spring
8. Why Your Cannas Might Not Have Come Back
9. Choosing the Best Spot for Success
10. Dividing Your Plants for More Flowers
11. Variety Matters
12. Summary of the Annual Cycle
13. Conclusion
14. FAQ

Introduction

Bringing a touch of the tropics to your backyard is one of the most rewarding parts of summer gardening. There is something truly special about the first time a canna lily unfurls its bold, banana-like leaves and displays its vibrant, glowing blooms. These plants are famous for their high-energy colors and architectural presence. Whether you are planting them in a large garden bed or using them as a "thriller" in a decorative patio pot, they always make a statement.

If you are new to growing these beauties, you likely have one major question: will canna lilies grow back every year? At Longfield Gardens, we want to help you enjoy these stunning flowers season after season. Understanding how these plants grow is the first step toward a successful, recurring display. This article will explain the lifecycle of canna lilies and how your local climate determines their ability to return. If you want to shop by height and habit, start with our Tall Cannas collection.

We will cover the difference between growing them as perennials and annuals. You will also learn the simple steps for winter care so you can keep your favorite varieties for years to come. With a little bit of knowledge, you can ensure your garden stays colorful every summer. The answer is a resounding yes—canna lilies can return every year, provided they are given the right care for your specific growing zone. For an easy place to check your area, visit our Hardiness Zone Map.

The Short Answer to Their Longevity

The simple answer is that canna lilies are perennials. In the world of gardening, a perennial is a plant that lives for more than two years. Unlike annuals, which complete their entire life cycle in a single season, canna lilies are designed to store energy and regrow. However, their ability to grow back on their own depends entirely on where you live.

Canna lilies are tropical and subtropical plants by nature. They love heat, humidity, and plenty of sunshine. Because they evolved in warm climates, they do not have a natural defense against deep freezes. In warm parts of the country, they stay in the ground all year and sprout again as soon as the soil warms up. For more on how these plants perform in the garden, see All About Cannas.

In colder regions, the "perennial" nature of the plant requires a little help from the gardener. While the plant itself wants to live for many years, the frozen winter soil will damage the roots if they are left unprotected. For gardeners in the north, canna lilies "grow back" because the gardener saves the underground roots and replants them in the spring.

Key Takeaway: Canna lilies are perennials that store energy in underground stems. They return naturally in warm climates but require winter storage in cold climates to survive for the next year.

Understanding How Canna Lilies Grow

To understand why these plants can return every year, it helps to look at what is happening beneath the soil. Canna lilies grow from something called a rhizome. A rhizome is a thick, fleshy underground stem. It acts like a battery or a storage tank for the plant.

During the summer, the large leaves soak up sunlight and turn it into energy. That energy is sent down to the rhizome. The rhizome grows larger and often produces "eyes," which are the points where new stems will emerge. This storage system is the reason why canna lilies are so resilient. Even if the top of the plant is cut back, the rhizome holds the life force needed to start over.

Because they grow from these thick stems rather than tiny seeds, canna lilies are very reliable. When you plant a healthy rhizome, you are giving the plant a massive head start. This is why they grow so quickly and reach such impressive heights in a single summer. They aren't starting from scratch; they are waking up from a nap.

The Role of USDA Hardiness Zones

Your USDA hardiness zone is the most important factor in determining if your canna lilies will grow back without your help. These zones are based on the average minimum winter temperature in your area. You can easily find your zone by looking at a map or using your zip code on our website.

Growing in Zones 8 to 11

In USDA zones 8 through 11, canna lilies are reliably hardy. This includes much of the southern United States and parts of the West Coast. In these areas, the ground rarely freezes deep enough to reach the rhizomes. You can leave your cannas in the ground all year long.

In the winter, the foliage may turn brown and die back after a light frost. This is normal. The plant is simply going dormant. Once the spring sun warms the earth, new green shoots will pop up from the same spot. In these warm zones, canna lilies can actually become quite large and spread over time.

Growing in Zones 3 to 7

In USDA zones 3 through 7, the winters are too cold for canna lily rhizomes to survive in the ground. If they are left outside, the water inside the fleshy rhizome will freeze, causing it to turn to mush. When spring arrives, there will be nothing left to grow.

Gardeners in these zones have two choices. You can treat them as "annuals," meaning you let them go at the end of the year and buy fresh ones next spring. Or, you can "lift" the rhizomes. Lifting is the process of digging them up and keeping them in a frost-free place for the winter. This allows you to keep your favorite colors and see them grow back year after year.

How to Help Cannas Grow Back in Warm Climates

If you live in a warm zone, your canna lilies are very low-maintenance. However, a little bit of care will ensure they return even stronger each year. Since they stay in the ground, they will eventually become crowded.

Every two or three years, it is a good idea to thin out your canna lily patches. If too many rhizomes are competing for the same space and nutrients, the blooms may become smaller. Digging up a few and moving them to a new spot—or giving them to a neighbor—keeps the original patch healthy.

In the late fall or early winter, once the leaves have turned brown, you can cut the stalks down to about three or four inches above the ground. This keeps the garden looking neat. Some gardeners like to add a layer of mulch over the top. Mulch helps regulate soil temperature and keeps the rhizomes cozy until spring.

What to do next in warm zones:

• Wait for the foliage to brown in late fall.
• Cut stalks back to a few inches above the soil.
• Apply a 2-inch layer of bark mulch or straw for protection.
• Divide the clumps every few years to prevent overcrowding.

The Art of Overwintering in Cold Climates

For those of us in the North, the "secret" to making canna lilies grow back is the overwintering process. While it might sound like a lot of work, it is actually a simple autumn ritual. It is a great way to save money and enjoy the satisfaction of seeing your specific plants get bigger each season. If you want more practical growing tips, Fresh Ideas for Growing Cannas is a helpful next step.

Timing the Harvest

The best time to dig up your cannas is right after the first frost. You will know it has happened because the beautiful green or bronze leaves will suddenly turn black or dark brown. This is a sign from nature that the plant has moved its energy down into the rhizome for the winter.

Don't worry if the foliage looks messy; the root is perfectly safe. In fact, that frost is helpful because it tells the plant to go to sleep. Once the leaves are hit by frost, you can cut the stems down to about 4 or 6 inches. This makes the plant much easier to handle.

Digging and Cleaning

Use a garden fork or a shovel to gently lift the clump out of the soil. Start digging several inches away from the base of the stems to avoid cutting into the fleshy rhizomes. Once the clump is out, shake off the excess soil.

You do not need to wash the rhizomes with water. In fact, keeping them dry is better for storage. Simply brush off the big clumps of dirt. If you grew your cannas in pots, the process is even easier. You can just tip the pot over and pull the root ball out. For container growing ideas, see Best Summer Bulbs for Containers.

Drying and Storing

Before you put them away for the winter, the rhizomes need to "cure" or dry out slightly. Place them in a garage or a shed for a few days. They should be out of the rain but in a place with good air circulation.

After a few days, find a storage container. A cardboard box, a plastic bin with air holes, or even a paper bag will work. Many gardeners at Longfield Gardens recommend nesting the rhizomes in a material that holds just a tiny bit of moisture but stays breathable. Good options include:

• Peat moss
• Vermiculite
• Wood shavings (like the kind used for pet bedding)
• Slightly damp sand

Store the box in a cool, dark, and frost-free place. A basement, a crawl space, or an insulated garage is perfect. The ideal temperature is between 40°F and 50°F. You want them to stay dormant, not start growing, but also not freeze.

Key Takeaway: Overwintering is a simple process of "dig, dry, and store." It protects the plant's energy source from the killing cold of winter.

Starting Your Cannas Again in the Spring

When the days start getting longer and the birds return, it is time to think about your cannas. The beauty of these plants is that they are ready to go as soon as the conditions are right. You have two main ways to get them growing again.

The Head Start Method

If you want flowers as early as possible, you can start your saved rhizomes indoors about 4 to 6 weeks before the last frost date. Place the rhizomes in pots with some potting soil and put them in a sunny window or under grow lights.

Keep the soil lightly moist. Within a few weeks, you will see green points poking through the soil. By the time the weather is warm enough to go outside, you will have a sturdy plant already several inches tall. This is a fantastic way to extend your tropical season in shorter-summer regions.

Direct Planting

The easier method is to wait until the soil is warm and the danger of frost has passed. Canna lilies are like tomatoes; they do not like cold soil. Wait until the ground is at least 60°F. In most areas, this is in late May or early June.

Dig a hole about 4 inches deep. Lay the rhizome in the hole horizontally. If you see "eyes" or small sprouts, point them upward. Cover them with soil and give them a good drink of water. Within a couple of weeks, the first leaves will push through the surface, and your perennial cycle has officially begun again.

Why Your Cannas Might Not Have Come Back

Sometimes, a gardener expects their cannas to grow back, but they don't see any movement in the spring. If this happens, don't be discouraged. There are usually a few simple reasons why a canna lily fails to return.

Storage Issues

The most common reason in cold zones is that the rhizomes rotted or dried out during the winter. If the storage area is too damp, fungi can take hold. If the area is too dry and the rhizomes weren't packed in a medium like peat moss, they can shrivel up like a raisin.

When you take them out of storage in the spring, give them a gentle squeeze. They should feel firm, like a fresh potato. If they are mushy or completely hollow and brittle, they likely won't grow.

Soil Temperature

Canna lilies are patient. If you planted them and it has been three weeks with no growth, check the weather. If the spring has been cold and rainy, the rhizomes are likely just waiting for the sun. They often won't start moving until the days are consistently warm.

Poor Drainage

Canna lilies love water, but they do not like to sit in a swamp during the winter. If you live in a warm zone and your cannas didn't return, check the drainage in that spot. If the soil stays saturated and cold all winter, the rhizomes can rot in the ground. Planting them in well-draining soil or raised beds is a great way to prevent this.

Choosing the Best Spot for Success

To make sure your canna lilies have enough energy to grow back every year, you need to give them a great summer. The more energy they store in the summer, the stronger the rhizome will be for the winter.

Sunlight is Key Cannas are sun-worshippers. They need at least 6 to 8 hours of direct sunlight every day. If they are planted in the shade, they will grow tall and lanky, and they may not produce enough energy to survive the winter or bloom well the following year.

Feed and Water Because they grow so much in a short time, cannas are "heavy feeders." We recommend using a balanced fertilizer throughout the growing season. They also appreciate consistent moisture. In the heat of mid-summer, don't be afraid to give them a deep soaking. A happy, well-fed canna produces a much larger, healthier rhizome for next year.

Space to Breathe When you replant your rhizomes in the spring, give them space. Dwarf varieties can be planted about a foot apart, but standard and giant types need two to three feet of space. Good airflow helps prevent leaf issues and ensures every leaf gets plenty of sun.

Dividing Your Plants for More Flowers

One of the most exciting things about canna lilies growing back is that they usually bring friends. A single rhizome planted in May will often turn into a large clump of five or six rhizomes by October. This is how your garden can grow over time without buying new plants.

When you dig them up in the fall (or before you replant in the spring), you can easily divide them. Look for the natural "joints" in the root system. You can usually snap them apart with your hands or use a clean knife. As long as each piece has at least one or two "eyes" (growing points), it will grow into a full-sized plant.

This is a fun and easy way to expand your garden. You can take one beautiful red canna and turn it into a whole hedge within just a few seasons. It also makes them a great plant for sharing with friends and neighbors.

What to do next for more plants:

• Inspect your lifted clumps in the spring.
• Locate the "eyes" or growing points on the rhizomes.
• Use a sharp, clean knife to cut the clump into smaller sections.
• Ensure each section has at least one healthy eye and a piece of the fleshy root.
• Let the cut ends dry for a day before replanting.

Variety Matters

While all canna lilies have the potential to grow back, some are particularly prized for their performance. At Longfield Gardens, we offer a wide range of colors and sizes, including our Canna Assorted Collection.

• Tall Varieties: These can reach 4 to 6 feet in height. They are perfect for the back of a flower border or as a natural privacy screen during the summer. A great example is Canna Tall Australia.
• Dwarf Varieties: These stay compact, usually under 3 feet. They are much easier to manage in containers, which makes the "lifting" process simpler for northern gardeners. One option to compare is Canna Tall Stuttgart.
• Foliage Stars: Some varieties are grown as much for their leaves as their flowers. Look for types with striped (variegated) leaves or deep burgundy and bronze tones. Try Canna Tall Pretoria for bold foliage and flowers, or Canna Tall Tropicanna for another standout look.

By choosing varieties that fit your lifestyle, you make the yearly return of these plants something to look forward to rather than a chore.

Summary of the Annual Cycle

To keep things simple, let's look at the "year in the life" of a canna lily for a gardener in a cold climate:

1. Spring: Plant your stored or newly purchased rhizomes once the soil is warm and frost is gone.
2. Summer: Enjoy the rapid growth and tropical blooms. Keep them watered and fed.
3. Late Summer: Deadhead faded flowers to keep the plant looking tidy and to encourage more blooms.
4. Autumn: Wait for the first frost to blacken the leaves. Cut them down and dig them up.
5. Winter: Store the rhizomes in a cool, dark place in a box of peat moss or wood shavings.
6. Repeat: Do it all again next year, perhaps with even more plants thanks to division!

Conclusion

Canna lilies are a wonderful investment for any garden. Because they are perennials, they offer the exciting potential to grow back and become more impressive every year. Whether you live in the sunny South where they stay in the ground, or in the North where you bring them in for a winter nap, the result is the same: a spectacular, tropical display that defines the summer season.

At Longfield Gardens, we love seeing how these bold plants transform outdoor spaces. They prove that you don't need to live in the tropics to have a lush, exotic paradise. By following the simple steps of matching your care to your climate, you can enjoy these "returning favorites" for many years to come. If you want a broader look at our plant philosophy, read more About Us.

"Gardening with canna lilies is a journey that rewards you more each season as your collection grows and your garden matures."

We encourage you to pick out a few of your favorite colors and start your own canna lily tradition this year. With a little bit of sun and some simple winter protection, you'll be amazed at how easily these plants become a permanent part of your summer landscape. For ordering details, see our Shipping Information.

FAQ

Can I leave canna lilies in the ground in Zone 7?

Zone 7 is often considered a "borderline" zone for canna lilies. In many years, they may survive if they are planted in a sheltered spot near a warm foundation and covered with a very thick layer of mulch (6–10 inches). However, to be completely safe, most gardeners in Zone 7 prefer to dig them up, as an unusually cold winter can still kill the rhizomes.

Do canna lilies in pots grow back too?

Yes, canna lilies in containers are still perennials. In warm zones, you can leave the pot outside, though you should ensure it doesn't get waterlogged. In cold zones, you can either move the entire pot into a frost-free garage or basement, or you can pull the rhizomes out of the pot and store them in a box of peat moss.

How long can canna lily rhizomes stay out of the ground?

If stored correctly in a cool, dark place, canna lily rhizomes can stay dormant for about 5 to 6 months. This is usually plenty of time to get them through a standard winter. It is important to check them once or twice during the winter to make sure they aren't rotting or drying out completely.

Do I need to cut off the flowers for them to grow back?

Cutting off dead flowers, a process called deadheading, is not strictly necessary for the plant to grow back the following year. However, it is very helpful. Removing faded blooms prevents the plant from wasting energy on making seeds, allowing it to send all that energy down into the rhizome for next year’s growth.