How to Plant and Grow Bulbs Canna Lily

Table of Contents

1. Introduction
2. Understanding Bulbs Canna Lily
3. Choosing the Right Planting Site
4. When to Plant Cannas
5. How to Plant Bulbs Canna Lily
6. Care and Maintenance During the Growing Season
7. Designing with Cannas
8. Winter Care and Overwintering
9. Growing Cannas in Different Climates
10. Dividing Canna Rhizomes in Spring
11. Summary of Success
12. FAQ

Introduction

There is something undeniably exciting about watching a canna lily emerge from the soil. One moment you have a bare patch of earth, and the next, bold, tropical leaves are unfurling with a speed that seems almost magical. These plants bring a sense of high-summer energy and lushness to any yard, transforming a standard garden bed into a vibrant sanctuary. At Longfield Gardens, we love how assorted cannas bridge the gap between early summer blooms and the late-season arrivals, providing a constant parade of color when other plants might be slowing down in the heat.

In this guide, we will explore everything you need to know about growing cannas, from choosing the right location to ensuring they thrive all season long. Whether you are looking to create a tall privacy screen or add a pop of color to a patio container, cannas are a versatile and rewarding choice. We have designed this article to help gardeners of all skill levels achieve success with their summer garden.

By understanding the simple needs of cannas—warm soil, plenty of water, and bright sunshine—you can enjoy a tropical paradise right in your own backyard from midsummer until the first frost.

Understanding Bulbs Canna Lily

When people talk about bulbs canna lily, they are technically referring to rhizomes. While many gardeners use the word "bulb" as a general term for any underground storage structure, a rhizome is a thick, fleshy stem that grows horizontally just beneath the soil surface. These rhizomes store the energy the plant needs to produce its massive leaves and brilliant flowers.

When you receive your canna rhizomes, you will notice they have "eyes." These are the small, pointed growth buds where the new stems will emerge. At Longfield Gardens, we have found that the size and quality of the rhizome directly impact the performance of the plant. A larger rhizome with three to five eyes will generally produce a more robust plant with more flower stalks than a smaller piece with only one or two eyes.

Cannas are native to tropical and subtropical regions, which explains their love for heat and moisture. They are not like spring-blooming tulips or daffodils that require a cold winter chill. Instead, they are "tender perennials," meaning they thrive in warm weather and will continue to grow as long as the temperatures stay above freezing. In warmer climates (USDA zones 8 or 9 and higher), they can stay in the ground year-round. In cooler northern climates, they are usually grown as annuals or dug up and stored for the winter.

Key Takeaway: A canna "bulb" is actually a rhizome. For the best results, look for plump rhizomes with multiple growth eyes, as these will establish themselves more quickly and produce a fuller display of flowers.

Choosing the Right Planting Site

The first step to success is matching what the plant needs to the spot you have available. Cannas are not shy about their requirements: they want as much sun and water as you can give them.

Sun Exposure

For the most vibrant foliage and the maximum number of flowers, plant your cannas in full sun. This means a location that receives at least six to eight hours of direct sunlight every day. In very hot southern climates, they can tolerate some light afternoon shade, but in northern regions, full sun is essential. Without enough light, the plants may become "leggy" (stretching toward the sun) and will produce fewer blooms.

Soil and Drainage

"Drainage" refers to how fast water leaves the soil after rain or watering. While many bulbs and tubers rot if the soil is too wet, cannas are surprisingly tolerant of damp conditions. In fact, they are one of the few decorative plants that can thrive in rain gardens or near the edge of a pond.

However, they still prefer soil that is rich in organic matter. If your soil is very heavy clay or very sandy, you can improve it by digging in some compost or well-rotted manure before planting. This helps the soil hold onto the moisture and nutrients that cannas need to grow several feet tall in a single season.

Space to Grow

Because cannas can grow quite large, it is important to give them enough room. Depending on the variety, they can reach anywhere from 2 to 8 feet tall. Check the expected height of your specific variety so you don't accidentally plant a giant in the front of your flower bed. Generally, you should space rhizomes about 1 to 2 feet apart to allow for air circulation and plenty of room for the leaves to spread.

When to Plant Cannas

Timing is everything when it comes to tropical plants. Because cannas are sensitive to cold, planting them too early can result in the rhizomes sitting in cold, wet soil, which may lead to rot or very slow growth.

The best time to plant is when the danger of frost has passed and the soil has warmed up to at least 65°F. In many northern states, this usually happens in late May or early June. A good rule of thumb is to wait until you are comfortable planting out your tomatoes and peppers.

If you want to get a head start on the season, you can start your cannas indoors about four to six weeks before the last frost date. Simply plant the rhizomes in pots with some potting mix and keep them in a warm, sunny window or under grow lights. By the time the weather warms up, you will have established plants ready to go into the garden, which can result in earlier blooms.

What to do next:

• Check your local frost dates to determine your safe planting window.
• Monitor the soil temperature with a simple garden thermometer.
• If you live in a cold region, consider starting rhizomes in pots indoors in April.
• Prepare your garden bed by clearing weeds and adding a layer of compost.

How to Plant Bulbs Canna Lily

Once the soil is warm and your site is ready, planting is a simple process. Getting the depth and orientation right ensures the plant emerges quickly.

Step-by-Step Planting

1. Loosen the Soil: Use a garden fork or shovel to loosen the soil to a depth of about 6 inches. This makes it easier for the new roots to spread.
2. Dig a Shallow Hole: Cannas do not need to be buried very deep. Dig a hole or a trench about 2 to 3 inches deep.
3. Place the Rhizome: Lay the rhizome horizontally in the hole. You don't need to stand it on end. Look for the "eyes" (the small growing points) and try to point them upward, but don't worry too much if you can't tell which side is which—the plant will figure out which way is up.
4. Cover and Water: Cover the rhizome with soil and firm it down gently with your hands to remove any large air pockets. Water the area thoroughly to settle the soil around the rhizome.

Patience is Key

Don't be discouraged if you don't see green shoots right away. Cannas take their time to wake up. Depending on the soil temperature, it can take two to three weeks for the first sprouts to appear above the ground. Once they start growing, however, they move very fast, often adding several inches of height each week during the peak of summer.

Care and Maintenance During the Growing Season

Cannas are relatively low-maintenance once they are established, but they do have a "big appetite" for water and nutrients.

Watering Correctly

Because of their large leaves, cannas lose a lot of moisture through evaporation. They prefer "deep watering" rather than frequent light sprinkles. Aim to keep the soil consistently moist but not soggy. If the weather is particularly hot and dry, you may need to water them every day, especially if they are growing in containers.

Fertilizing for Success

To support their rapid growth and heavy blooming, cannas benefit from regular feeding. You can use a balanced, water-soluble fertilizer once a month throughout the growing season. This provides the extra boost they need to produce those tall flower spikes and lush foliage.

Deadheading

"Deadheading" is the practice of removing faded flowers before they turn into seed pods. On a canna lily, the flowers bloom in clusters at the top of the stalk. As individual flowers wither, you can pinch them off. Once the entire flower spike has finished blooming, cut the stalk back to the next side-shoot or leaf. This encourages the plant to put its energy into producing new flower stalks rather than seeds.

Pest and Disease Management

Cannas are generally quite hardy, but they can occasionally be visited by "leaf rollers"—small caterpillars that use silk to roll the leaf into a tube where they hide. If you see leaves that are stuck together or have small holes, you can usually manage this by simply unrolling the leaf and removing the caterpillar by hand. Keeping the garden clean and removing dead foliage at the end of the season also helps prevent issues.

Key Takeaway: Think of cannas as the "marathon runners" of the garden. They need plenty of fuel (fertilizer) and hydration (water) to keep up their impressive pace all summer long.

Designing with Cannas

Cannas are more than just a pretty flower; they are structural elements that can change the entire look of your landscape. Their bold texture provides a great contrast to fine-textured plants like ornamental grasses or ferns.

Background and Screens

The tallest varieties of cannas make excellent temporary privacy screens. If you have a fence that needs hiding or a neighbor's shed you'd rather not see, a row of tall cannas will create a beautiful living wall by mid-July.

Color Palettes

Cannas offer a wide range of colors, not just in their flowers but in their leaves as well.

• Foliage: You can find varieties with deep burgundy leaves, bright lime-green leaves, or even "variegated" leaves with stripes of yellow, orange, and green.
• Flowers: The blooms come in shades of fire-engine red, glowing orange, sunny yellow, and soft pink.

For a high-energy look, pair orange-flowered cannas with purple-leaved plants. For a more serene tropical vibe, use green-leaved cannas with white or pale pink flowers.

Growing in Containers

If you have a small yard or only a balcony, you can still enjoy these plants. Many dwarf varieties stay under 3 feet tall and are perfect for pots. When planting in containers, make sure the pot has drainage holes and is heavy enough that it won't tip over when the plant gets tall and catches the wind. Use a high-quality potting mix and remember that container plants will need more frequent watering and fertilizing than those in the ground.

Winter Care and Overwintering

In many parts of the United States, winter temperatures will kill canna rhizomes if they are left in the ground. Unless you live in USDA zones 8-10, you will need to decide whether to treat them as annuals (and buy new ones next year) or save them for the following season.

When to Dig Them Up

Wait until the first light frost kills the foliage. The leaves will turn black or brown and look wilted. This is actually a good thing! The frost signals to the plant that it is time to go dormant. After the frost, cut the stems back to about 3 or 4 inches above the ground.

Digging and Cleaning

Carefully dig around the clump with a shovel or garden fork. Be careful not to slice into the rhizomes themselves, as wounds can lead to rot during storage. Lift the entire clump out of the ground. You can gently shake or rinse off excess soil, but don't worry about getting them perfectly clean.

Curing and Storing

1. Curing: Let the rhizomes sit in a dry, frost-free place (like a garage or shed) for a few days to "cure." This helps the outer skin toughen up.
2. Packing: Place the rhizomes in a cardboard box or plastic bin. Many gardeners find success packing them in slightly damp peat moss, vermiculite, or even shredded newspaper. You want just enough moisture to keep them from shriveling, but not so much that they get moldy.
3. The Ideal Spot: Store the box in a cool, dark place where temperatures stay between 45°F and 55°F. An unheated basement or a crawl space is usually perfect. Avoid places that might freeze, like an outdoor shed in a cold climate.

Checking During Winter

Once a month, peek into your storage box. If the rhizomes look very shriveled, mist them lightly with a spray bottle. If you see any soft or mushy spots, cut those sections out and discard them to prevent the rot from spreading to the healthy rhizomes.

Growing Cannas in Different Climates

While we provide general advice, gardening is always a local activity. Your specific weather and soil conditions will influence how your cannas behave.

Northern Gardens (Zones 3-6)

In the North, the growing season is shorter. To get the most "bang for your buck," we recommend starting your rhizomes indoors in pots in April. This ensures you have large, flowering plants by July. Because summer nights can still be cool, planting your cannas against a south-facing wall or near a stone patio can provide extra "radiant heat" that these tropical plants love.

Southern Gardens (Zones 8-11)

In warmer climates, cannas are incredibly easy. They can often be left in the ground all year. However, they are vigorous growers and will eventually form very large, crowded clumps. Every three or four years, it is a good idea to dig them up in the early spring, divide the rhizomes, and replant them. This prevents the plants from becoming stunted and keeps the flower production high.

Coastal and Windy Areas

Because cannas have such large leaves, they can act like sails in a strong wind. If you live in a very windy area, try to plant them in a sheltered spot, such as near a house or a sturdy hedge. You can also look for shorter, "dwarf" varieties that are less likely to be bent or broken by the wind.

Dividing Canna Rhizomes in Spring

One of the best things about bulbs canna lily is that they multiply! One rhizome planted in the spring will often grow into a large clump by the fall. If you have stored your rhizomes over the winter, spring is the perfect time to divide them before replanting.

When you look at a large clump of rhizomes, you will see distinct sections, each with its own "eyes." Use a clean, sharp knife to cut the clump into smaller pieces. Make sure each piece has at least two or three healthy-looking eyes.

After cutting, let the pieces sit for a day so the cut surface can "callus" (dry over). This simple step helps prevent soil-borne diseases from entering the rhizome when you plant it. This is a wonderful way to grow your garden for free or to have extra plants to share with friends and neighbors.

What to do next:

• In early spring, bring your stored rhizomes out and inspect them.
• Use a sterilized knife to divide large clumps into smaller sections.
• Allow cuts to dry for 24 hours before planting or potting up.
• Share your surplus with fellow gardeners to spread the tropical joy.

Summary of Success

Growing cannas is a rewarding experience that brings a dramatic, high-impact look to any garden. By focusing on the few basics—sun, water, and warm soil—you can ensure these tropical beauties perform their best. At Longfield Gardens, we take pride in providing high-quality rhizomes that give you a head start on a beautiful season. Remember that gardening is an adventure, and each season offers a chance to learn more about how these plants interact with your unique local environment.

Final Tips for Your Canna Garden:

• Always wait for the soil to warm up before planting outdoors.
• Don't be afraid to water; these plants are very thirsty during the heat of summer.
• Use tall varieties for privacy and shorter varieties for containers.
• Dig and store rhizomes in the fall if you live in a cold climate.

Gardening is about the journey as much as the destination. The sight of a canna lily in full bloom, with hummingbirds darting between the flowers, is a rewarding result that makes every step of the process worthwhile.

For more information on planning your summer garden, you can visit our Garden Basics page to find more tips and tricks. We look forward to helping you grow a more beautiful yard.

FAQ

Do I have to dig up my canna lily rhizomes every year?

Whether you need to dig them up depends on your USDA hardiness zone. If you live in zone 8 or warmer, cannas can usually stay in the ground year-round with a layer of mulch for protection. If you live in zone 7 or colder, the ground will likely freeze deep enough to kill the rhizomes, so you should dig them up after the first frost and store them indoors.

How deep should I plant bulbs canna lily?

Canna rhizomes should be planted relatively shallowly. Dig a hole about 2 to 3 inches deep and lay the rhizome horizontally. If you see the growth buds (eyes), point them toward the sky. Cover with soil and water well. Planting them too deep can cause them to take much longer to emerge and bloom.

Why aren't my cannas blooming?

The most common reasons for a lack of blooms are insufficient sunlight and lack of nutrients. Cannas need at least six hours of direct sun to produce flowers. Additionally, because they grow so fast, they require regular fertilizing. If your plant has lush leaves but no flowers, try moving it to a sunnier spot or increasing your feeding schedule with a balanced fertilizer.

Can cannas grow in pots?

Yes, cannas grow very well in containers. In fact, using pots is a great way to enjoy them on patios or balconies. Choose a large, heavy pot with drainage holes and use a high-quality potting mix. Dwarf varieties are particularly well-suited for container life as they remain more compact and are less likely to tip over in the wind.