Growing Tropical Landscapes with Canna Lilies Bulbs

Table of Contents

1. Introduction
2. Understanding Canna Lilies Bulbs and Rhizomes
3. Choosing the Right Spot for Success
4. When to Plant Canna Lilies Bulbs
5. Step-by-Step Planting Guide
6. Popular Canna Varieties to Consider
7. Caring for Your Cannas During the Growing Season
8. Growing Canna Lilies in Containers
9. Winter Care and Storage
10. Creating a Tropical Oasis with Companion Plants
11. Simple Troubleshooting
12. Conclusion
13. FAQ

Introduction

There is nothing quite like the dramatic, architectural beauty of canna lilies to make a garden feel like a private tropical getaway. These plants are the heavy hitters of the summer garden, offering oversized, glossy leaves and vibrant clusters of flowers that bloom from midsummer right up until the first frost. Whether you are looking to create a lush privacy screen or add a pop of exotic color to a patio container, canna lilies bulbs (which are technically rhizomes) are some of the most rewarding and easy-to-grow additions you can choose.

At Longfield Gardens, we believe that every yard has room for at least one or two of these showstoppers. We provide high-quality Tall Cannas that are ready to take off as soon as the weather warms up, ensuring you get the most impact out of your growing season. This guide is designed for home gardeners who want to understand the simple steps required to grow healthy, vibrant cannas from start to finish.

We will cover how to select the right varieties, the best time to get them in the ground, and the straightforward care routines that keep them looking their best all summer long. By focusing on a few gardening basics, you can enjoy a season of stunning, head-turning blooms with very little stress.

Understanding Canna Lilies Bulbs and Rhizomes

When you shop for canna lilies, you will often see them referred to as "bulbs." In the world of botany, they are actually rhizomes. A rhizome is a thick, fleshy underground stem that grows horizontally just beneath the soil surface. This structure acts as a storage unit for the plant, holding all the energy it needs to send up those tall stalks and massive leaves.

When you receive your package from us, you might notice that the rhizomes look a bit like ginger roots. You will see small bumps or points on the surface, which gardeners call "eyes." These eyes are where the new growth will emerge. The more eyes a rhizome has, the more stems it can produce.

It is helpful to remember that while they are tough, rhizomes are living things. They prefer to stay firm and hydrated. If you aren't ready to plant them immediately upon arrival, keep them in a cool, dark, and dry place in their original packaging to keep them dormant until the soil is ready.

Choosing the Right Spot for Success

The most important rule for growing beautiful cannas is "right plant, right place." Because cannas are native to tropical and subtropical regions of the Americas, they have very specific preferences for sun and soil.

Sun Requirements

Cannas are true sun-worshippers. To get the best flower production and the most vivid foliage colors, they need plenty of direct light. Aim for a spot that receives at least 6 to 8 hours of full sun every day. While they can grow in partial shade, the plants will likely be shorter, the stems may be floppier, and you will see fewer flowers. If you are growing a variety with dark or variegated leaves, the colors will be much more intense when the plant gets enough sunlight.

Soil and Drainage

"Drainage" simply refers to how quickly water moves through your soil. Cannas love moisture, but they do not like to sit in stagnant, soggy water, which can cause the rhizomes to rot. If your soil is heavy clay and stays wet for days after a rain, consider planting in raised beds or large containers where you can control the soil mix.

Cannas are also "heavy feeders," meaning they appreciate soil that is rich in organic matter. Mixing in some compost or well-rotted manure before planting provides a steady source of nutrients that supports their rapid growth.

Space to Grow

Consider the mature size of the variety you are planting. Some cannas can reach 6 to 8 feet tall and 3 feet wide. Make sure your chosen spot has enough room for the plant to reach its full potential without crowding out its neighbors. If you have a smaller space or are gardening on a balcony, look for dwarf varieties that stay a manageable 2 to 3 feet tall.

When to Plant Canna Lilies Bulbs

Timing is everything when it comes to tropical plants. Because cannas are sensitive to cold, planting too early can stall their growth or damage the rhizomes.

Watching the Temperature

The best time to plant canna lilies bulbs outdoors is in late spring or early summer, once the soil has warmed up to at least 60°F. A good indicator is your local frost date; check the Hardiness Zone Map and wait until the danger of frost has passed. If you plant them in cold, damp soil, the rhizomes will simply sit idle, which increases the risk of decay.

Getting a Head Start Indoors

If you live in a northern region with a short growing season, you can start your canna rhizomes indoors about 4 to 6 weeks before the last frost.

• Plant each rhizome in a pot filled with quality potting soil.
• Keep the pots in a warm, sunny window or under grow lights.
• Once the weather is reliably warm, you can "harden off" the plants (gradually acclimating them to outdoor conditions) and then transplant them into the garden.

This head start ensures that you see flowers much earlier in the summer. At Longfield Gardens, we time our shipping based on your USDA hardiness zone so that your plants arrive around the time it is safe to start them. See our Shipping Information page for details.

Step-by-Step Planting Guide

Planting cannas is a simple process. Follow these steps to ensure your rhizomes have the best foundation for the season.

1. Prepare the Soil: Loosen the soil to a depth of about 6 to 8 inches. If your soil is poor, mix in a few handfuls of compost.
2. Dig the Hole: Dig a shallow hole about 3 to 4 inches deep.
3. Position the Rhizome: Place the rhizome horizontally in the hole. Look for the "eyes" or any sprouts already beginning to grow and point them upward. If you can't tell which side is up, don't worry—the plant will naturally find its way toward the light.
4. Spacing: Space your cannas about 1 to 2 feet apart. For larger, taller varieties, 2 feet is better to allow for air circulation. For a dense, hedge-like look, you can plant them slightly closer.
5. Cover and Water: Fill the hole with soil and press down gently to remove air pockets. Give the area a good watering to settle the soil around the rhizome.

Key Takeaway: The secret to a great start is warm soil and shallow planting. Avoid the temptation to bury rhizomes too deep; 3 to 4 inches of soil over the top is perfect.

Popular Canna Varieties to Consider

At Longfield Gardens, we offer a variety of cannas that range from classic green-leaved types to those with dramatic, dark foliage. If you are working in a smaller space, browse our Short Cannas collection.

Tall Varieties for Height and Privacy

• Wyoming: This is a classic favorite. It features dark, bronze-purple foliage and bright orange blossoms. It can easily reach 6 feet tall, making it a great choice for the back of a flower bed.
• City of Portland: Known for its beautiful coral-pink flowers and lush green leaves, this variety adds a softer, romantic feel to the tropical look.
• The President: If you want a bold, traditional red, this is the one. It has bright green foliage and large, scarlet-red flowers that are highly attractive to hummingbirds.
• Richard Wallace: For a sunny glow, this variety offers lemon-yellow flowers and bright green leaves.

Varieties with Dramatic Foliage

• Stuttgart: This variety is famous for its striking green and white variegated leaves. It prefers a bit of afternoon shade to prevent the white parts of the leaves from scorching.
• Tropicanna: Often called a "rainbow in a leaf," this variety features stripes of green, gold, and pink with bright orange flowers.
• Red King Humbert: This variety has dark, smoky-bronze leaves that provide a stunning backdrop for its deep red flowers.

Dwarf Varieties for Containers

If you are working with pots, look for varieties labeled as "dwarf" or "compact." These typically stay under 3 feet tall but still produce the same large, beautiful flowers as their taller cousins. Varieties like Puck or the Futurity series are excellent choices for patio life.

Caring for Your Cannas During the Growing Season

Once your cannas have sprouted and are actively growing, they are relatively low-maintenance. However, providing them with consistent care will result in larger plants and more frequent blooms.

Watering Needs

Cannas are thirsty plants. During the heat of the summer, they need regular watering to keep their large leaves from wilting. As a general rule, aim for about an inch of water per week, either from rain or manual watering. If you are growing them in containers, you may need to water them every day during hot spells.

The best way to water is to soak the soil deeply and then let the top inch or two dry out before watering again. This encourages the roots to grow deep into the ground.

Fertilizing for Blooms

Because cannas grow so fast, they benefit from a boost of nutrients. Use a balanced, water-soluble fertilizer or a slow-release granular fertilizer once a month during the growing season. Follow the instructions on the product label for the correct application amounts. This extra energy helps the plant continue producing new flower stalks.

Deadheading

"Deadheading" is the process of removing spent flowers. When a flower cluster has finished blooming, you can cut the stalk back to the next set of leaves or the next flower bud. This keeps the plant looking tidy and encourages it to put its energy into producing more flowers rather than developing seeds.

Mulching

Adding a 2-inch layer of mulch (like shredded bark or straw) around the base of your plants helps retain soil moisture and keeps weeds at bay. Just be sure to keep the mulch a couple of inches away from the stems to prevent moisture from being trapped against the plant.

Growing Canna Lilies in Containers

Cannas are fantastic container plants. For a step-by-step version, see How to Plant Canna Lily Bulbs in Pots. Their vertical growth makes them a perfect "thriller" in the center of a large pot, surrounded by "fillers" like lantana and "spillers" like sweet potato vine.

Choosing the Right Pot

A single dwarf canna rhizome can grow in a 12-inch pot, but for taller varieties, you will need a heavy, substantial container (at least 18 to 24 inches in diameter). Cannas can become top-heavy as they grow, so a heavy pot prevents them from tipping over in the wind. Ensure the pot has plenty of drainage holes.

Potting Mix

Use a high-quality potting soil rather than garden soil. Potting soil is specifically designed to drain well while holding enough moisture for container plants. Because nutrients leach out of pots more quickly with frequent watering, be extra diligent about your fertilizing schedule for container-grown cannas.

Placement

Pots can be moved to follow the sun or to protect the plants during a particularly nasty storm. If you have a variety like Stuttgart, a container makes it easy to move the plant into a bit of shade during the hottest part of the afternoon.

Winter Care and Storage

In USDA zones 8 and warmer, cannas are generally hardy and can stay in the ground all year. In zones 7 and colder, the rhizomes will not survive a freezing winter in the ground. If you want to enjoy your cannas again next year, you will need to lift and store them.

Lifting the Rhizomes

Wait until the first light frost has blackened the foliage. This signal tells the plant to go dormant.

1. Cut the stems back to about 4 inches above the ground.
2. Gently lift the clump of rhizomes with a garden fork or shovel, being careful not to bruise or cut them.
3. Shake off the excess soil and let them sit in a dry, shaded area for a day or two to "cure."

Storage Conditions

Once the rhizomes are dry, place them in a box or a ventilated plastic bin. Many gardeners find success packing them in slightly damp peat moss, vermiculite, or sawdust. Store the box in a cool, dark, dry place where temperatures stay between 40°F and 50°F. An unheated basement or a crawlspace is often ideal.

Check on your rhizomes once or twice during the winter. If they look shriveled, lightly mist the packing material with water. If you see any soft or mushy spots, remove those pieces to keep the rest of the clump healthy.

What to do next:

• Check your local frost dates to plan your planting window.
• Prepare your garden beds by mixing in compost.
• Order your favorite varieties from us while they are in stock.
• If you live in a cold zone, set aside a box and some peat moss for winter storage.

Creating a Tropical Oasis with Companion Plants

Cannas look beautiful on their own, but they truly shine when paired with other plants that share their love for the sun and heat. For more design inspiration, see Fresh Ideas for Growing Cannas. At Longfield Gardens, we enjoy seeing how customers combine cannas with other summer-blooming favorites.

• Elephant Ears: The massive, heart-shaped leaves of elephant ears are the perfect partner for the upright stalks of cannas. They create a multi-layered tropical look.
• Dahlias: The intricate blooms of dahlias offer a beautiful contrast to the simpler, bold flowers of the canna.
• Caladiums: Use caladiums at the base of your cannas. Their colorful, variegated leaves fill in the lower space and hide the bottom of the canna stems.
• Ornamental Grasses: The fine texture of grasses like fountain grass or switchgrass provides a lovely contrast to the broad leaves of the canna lily.

Simple Troubleshooting

Cannas are generally very healthy, but you might occasionally run into a few common issues. Most of these have very easy solutions.

Plants Aren't Blooming

If your cannas have plenty of leaves but no flowers, the most likely cause is a lack of sunlight. Ensure they are getting at least 6 hours of direct sun. Another possibility is a lack of nutrients; a dose of balanced fertilizer often jumpstarts the blooming process. Finally, keep in mind that cannas like water. If the soil is too dry, the plant may prioritize leaf survival over flower production.

Holes in the Leaves

If you see small holes or rolled-up leaves, you might have "leafrollers." These are the larvae of certain butterflies or moths. In many cases, you can simply unroll the leaf and remove the caterpillar by hand. For larger infestations, consult your local garden center for a safe, targeted solution.

Yellowing Leaves

While it is normal for older, bottom leaves to turn yellow and die back as the plant grows, widespread yellowing can indicate a drainage issue. Ensure the soil isn't staying waterlogged. If the plant is in a pot, make sure the drainage holes aren't blocked.

Conclusion

Growing canna lilies bulbs is an easy way to bring a sense of adventure and lushness to your landscape. With their massive leaves and brilliant colors, they provide a focal point that lasts all season long. By choosing a sunny spot, keeping them well-watered, and giving them a little bit of food, you can enjoy a tropical paradise right in your own backyard.

Whether you are a seasoned gardener or just starting your first flower bed, cannas are a reliable choice that offers a high reward for very little effort. We take great pride in providing high-quality plants that help you achieve these results.

For a broader overview, see All About Cannas.

"The beauty of the garden is that it is always evolving. Adding canna lilies is like adding a bold brushstroke to a painting—it changes the entire feel of the space for the better."

Ready to start your tropical journey? Browse our selection at Longfield Gardens and pick out the colors that speak to you. With our 100% Quality Guarantee, you can plant with confidence and look forward to a summer filled with color.

FAQ

Can I grow canna lilies in the shade?

While cannas can grow in partial shade, they will not perform their best. They need at least 6 to 8 hours of direct sunlight to produce the best flowers and maintain the most vibrant foliage colors. In deep shade, the plants often become leggy and may fail to bloom entirely.

How often should I water my canna lilies?

Cannas prefer consistently moist soil. In the garden, they usually need about an inch of water per week. In containers, they dry out much faster and may need daily watering during the peak of summer. Always check the soil; if the top inch feels dry, it is time to water.

Are canna lilies toxic to pets?

Canna lilies are generally considered non-toxic to dogs and cats according to the ASPCA. However, it is always a good practice to keep pets from chewing on garden plants, as ingesting any plant material can cause mild stomach upset. Always keep unplanted rhizomes out of reach of curious animals and children.

Do I have to dig up my cannas every year?

This depends on your climate. If you live in USDA zones 8 to 11, cannas can stay in the ground year-round. In zones 7 and colder, the ground freezes deep enough to kill the rhizomes. In those areas, you should dig them up after the first frost and store them in a frost-free place for the winter.