Table of Contents
- Introduction
- Understanding Canna Flower Bulbs
- Choosing the Best Canna Varieties
- When to Plant Canna Flowers Bulbs
- Finding the Best Spot for Your Cannas
- How to Plant Canna Flowers Bulbs
- Growing Cannas in Containers
- Essential Summer Care and Maintenance
- How to Deadhead Cannas for More Blooms
- Overwintering Canna Flowers Bulbs
- Troubleshooting Common Issues
- Designing with Cannas
- The Longfield Gardens Guarantee
- Conclusion
- FAQ
Introduction
There is something truly magical about watching a tropical garden come to life in the middle of a typical backyard. The sight of broad, banana-like leaves and vibrant, glowing blossoms creates an instant vacation vibe that lasts all season long. Planting canna flowers bulbs is one of the easiest ways to bring this high-impact, exotic look to your landscape without needing a professional greenhouse.
At Longfield Gardens, we enjoy helping home gardeners find success with these resilient and showy cannas. Whether you have a sprawling garden bed or a sunny balcony with space for a few pots, cannas are a reliable choice for big color. We test these varieties in our own trial gardens to ensure they perform beautifully for you from the moment they arrive at your door.
This guide will walk you through everything you need to know about choosing, planting, and caring for cannas. We will cover the best timing for planting, how to provide the right environment for growth, and how to keep your plants thriving until the first frost. By following a few simple steps, you can enjoy a lush, tropical retreat right at home.
Understanding Canna Flower Bulbs
To grow healthy plants, it helps to understand what you are actually putting into the ground. While most gardeners call them "canna flowers bulbs," these plants actually grow from rhizomes. A rhizome is a thick, fleshy underground stem that stores energy and nutrients for the plant.
When you receive your shipment from us, you will notice that the rhizomes look a bit like ginger roots. They have small bumps or "eyes," which are the points where new growth will emerge. Because these rhizomes are packed with energy, they are ready to grow rapidly once the weather warms up.
Cannas are native to tropical and subtropical regions of the Americas. This heritage is why they love heat, sun, and plenty of moisture. In the United States, they are winter hardy in USDA zones 8 through 11. If you are not sure what that means for your garden, check the Hardiness Zone Map. In cooler zones (zones 3 through 7), they are treated as tender perennials. This means you can plant them in the spring, enjoy them all summer, and then either let them go at the end of the year or dig them up to store indoors for the following spring.
Choosing the Best Canna Varieties
One of the best things about canna flowers bulbs is the incredible variety available. You can choose plants based on their flower color, their foliage, or their final height. This versatility makes them useful for many different roles in the garden.
Tall vs. Dwarf Cannas
Height is a major factor when planning your garden layout.
- Tall Cannas: These varieties can reach 4 to 6 feet in height (and sometimes even taller in ideal conditions). They make excellent "thriller" plants in the back of a border or as a living privacy screen along a fence or patio.
- Dwarf Cannas: If you have a smaller space or prefer container gardening, dwarf varieties are a perfect fit. They typically grow between 2 and 3 feet tall, offering the same tropical look on a much more compact frame. They are sturdy and less likely to need staking.
Spectacular Foliage Options
While the flowers are stunning, many gardeners grow cannas specifically for their leaves. The foliage provides architectural interest even when the plant isn't in bloom.
- Bronze and Burgundy Foliage: These dark, moody leaves add a sophisticated touch to the garden. Varieties with dark foliage look especially striking when paired with hot-colored flowers like orange or red.
- Variegated Foliage: Some cannas feature striped or multi-colored leaves. These are showstoppers that draw the eye and provide interest from the moment the first leaf unfurls.
Flower Colors and Pollinators
Canna flowers come in a fiery palette of reds, oranges, yellows, and pinks. Some varieties even feature bi-colored or spotted petals. These bright blossoms are a magnet for pollinators. Hummingbirds, in particular, love the tube-shaped flowers, and you will often see bees and butterflies visiting your cannas throughout the day.
Key Takeaway: Choose your canna varieties based on the space you have available. Use tall varieties for back-of-the-border drama and dwarf varieties for pots or front-of-the-bed accents.
When to Plant Canna Flowers Bulbs
Timing is everything when it comes to tropical plants. Because cannas are native to warm climates, they have no tolerance for frost. If you plant them too early, the cold, damp soil can cause the rhizomes to struggle.
The Golden Rule of Temperature
The best time to plant canna flowers bulbs directly into the ground is in late spring, once the danger of frost has passed and the soil has warmed up to at least 60°F. In most regions, this aligns with the time you would plant tomatoes or basil. If the weather is still chilly and you are wearing a light jacket outside, it is likely too early for your cannas to go into the ground.
Getting an Early Start
If you live in a northern climate with a short growing season, you can start them indoors. About 4 to 6 weeks before the last expected frost, plant the rhizomes in pots filled with moist potting soil. Keep the pots in a warm, sunny spot. By the time the outdoor temperatures are safe, you will have established plants ready to take off. This method often results in earlier blooms and a longer season of color.
Shipping and Arrival
We time our shipments based on your USDA hardiness zone. Your order will typically arrive about two weeks before the ideal planting time for your area. When your package arrives, open it immediately to check the rhizomes. If you aren't ready to plant yet, keep them in a cool, dry, dark place until the soil is warm enough.
Finding the Best Spot for Your Cannas
Cannas are not shy plants. They want to be the center of attention, and their environmental needs reflect that. To get the most vibrant colors and the tallest growth, you need to find the right spot in your yard.
Sun Requirements
Cannas are sun-worshippers. For the best performance, plant them in a spot that receives at least 6 to 8 hours of direct sunlight each day. While they can grow in partial shade, you will likely see fewer flowers and the foliage may not be as vibrant. Sunlight provides the energy they need to produce those massive leaves and frequent flower spikes.
Soil and Drainage
"Drainage" simply means how fast water leaves the soil after a rain or watering. Cannas prefer soil that is rich in organic matter and stays consistently moist but does not stay soggy.
- In heavy clay soil: The water may move too slowly. You can improve this by adding compost or peat moss to loosen the soil structure.
- In sandy soil: Water might move too fast. Adding organic matter will help the soil hold onto the moisture and nutrients the plants need.
Wind Protection
Because tall cannas have such large leaves, they can act like sails in a high wind. If you live in a particularly breezy area, try to plant your tall cannas near a fence, a wall, or a group of sturdy shrubs. This provides a windbreak that prevents the leaves from shredding or the stalks from leaning.
How to Plant Canna Flowers Bulbs
Once the soil is warm and you have picked the perfect sunny spot, planting is a straightforward process. You don't need any special tools—a simple garden trowel or spade will do the trick.
Step 1: Prepare the Soil
Loosen the soil to a depth of about 8 to 10 inches. This makes it easier for the new roots to spread out and establish themselves quickly. If your soil is poor, this is a great time to mix in some compost or a balanced, slow-release fertilizer according to the package instructions.
Step 2: Dig the Hole
Dig a hole about 4 to 6 inches deep. If you are planting multiple canna flowers bulbs, pay attention to the spacing. For more detail, see How Deep to Plant Canna Lily Bulbs.
- Tall varieties: Space them 18 to 24 inches apart.
- Dwarf varieties: Space them 12 to 18 inches apart. Giving them enough room ensures they aren't competing for light and allows for good air circulation, which keeps the plants healthy.
Step 3: Position the Rhizome
Place the rhizome in the hole horizontally. Look for the "eyes" or small growth points. While cannas are resilient and will usually find their way up regardless of how they are positioned, pointing the eyes upward gives them a slight head start.
Step 4: Cover and Water
Fill the hole with soil and gently pat it down with your hands to remove any large air pockets. Water the area thoroughly immediately after planting. This "settles" the soil around the rhizome and signals to the plant that it is time to start growing.
What to do next:
- Check the soil temperature to ensure it's at least 60°F.
- Loosen the soil and add compost if needed.
- Plant rhizomes 4-6 inches deep with eyes facing up.
- Water deeply to settle the soil.
Growing Cannas in Containers
If you don't have a large garden bed, you can still enjoy the tropical beauty of cannas by planting them in pots. This is an excellent way to dress up a patio, deck, or entryway.
Choosing the Right Pot
Cannas have vigorous root systems, so they need plenty of space. For a single dwarf canna, a 12-inch diameter pot is usually sufficient. For taller varieties, you will want a larger, heavier container (at least 15 to 18 inches) to prevent the plant from tipping over in the wind. Ensure the pot has drainage holes at the bottom so the roots don't sit in water.
Potting Mix
Use a high-quality, well-draining potting soil rather than garden soil. Potting mix is lighter and designed to provide the right balance of air and moisture for container plants. Because pots dry out faster than the ground, you may need to water your container-grown cannas every day during the heat of the summer.
Feeding Container Cannas
Plants in containers have a limited amount of soil and nutrients. To keep them blooming all summer, feed them with a water-soluble fertilizer every 2 to 3 weeks. Look for a "bloom booster" formula to encourage more flower spikes.
Essential Summer Care and Maintenance
Once your cannas are established and growing, they are relatively low-maintenance. However, a little bit of regular attention will go a long way in keeping them looking their best until autumn.
Watering Correcty
Cannas are thirsty plants. They have a high leaf surface area, which means they lose a lot of moisture through evaporation. During the peak of summer, keep the soil consistently moist. Instead of a light sprinkle every day, give them a deep soaking once or twice a week (more often for containers). This encourages the roots to grow deeper into the soil, making the plant more resilient.
Fertilizing for Success
Cannas are "heavy feeders," meaning they use a lot of nutrients to produce their massive foliage and flowers. If you didn't add slow-release fertilizer at planting time, you can apply a balanced fertilizer once a month during the growing season. Always follow the label instructions to avoid over-fertilizing, which can lead to lots of leaves but fewer flowers.
Mulching
Applying a 2-inch layer of mulch around the base of your plants is a simple "easy win" for your garden. Mulch helps the soil retain moisture, keeps the roots cool, and suppresses weeds that might compete for nutrients. Shredded bark, compost, or even clean straw all work well.
How to Deadhead Cannas for More Blooms
Deadheading is the process of removing spent or faded flowers. While cannas will continue to grow without it, deadheading keeps the plant looking tidy and encourages it to produce more flower spikes.
The Right Way to Deadhead
When a flower cluster has finished blooming, look down the stem to where the next flower bud is emerging. Snip off the faded flower head just above that new bud. Once an entire flower stalk has finished blooming and no more buds are visible, you can cut the entire stalk back to where it meets the main foliage. This prevents the plant from putting energy into producing seeds and redirects that energy into making new flowers.
Foliage Care
Throughout the season, you may see a few lower leaves turn yellow or brown. This is a natural part of the plant's growth cycle. Simply snip these off at the base to keep the plant looking fresh and vibrant.
Overwintering Canna Flowers Bulbs
If you live in a region where the ground freezes (Zone 7 and colder), your cannas will not survive the winter outdoors. However, you don't have to buy new ones every year. You can easily save the rhizomes to plant again next spring.
When to Dig
Wait until after the first light frost has blackened the foliage. This frost tells the plant that it is time to go dormant. Once the leaves have turned brown or black, cut the stems back to about 3 or 4 inches above the ground.
Digging and Cleaning
Carefully use a garden fork or spade to lift the rhizomes out of the ground. Be careful not to bruise or cut the fleshy stems. Gently shake off the excess soil. You don't need to wash them; in fact, keeping them a little bit "dirty" can sometimes help protect them during storage.
Curing and Storing
Let the rhizomes air dry in a protected, shady area for a day or two. Then, place them in a cardboard box or a ventilated plastic bin. Many gardeners find success by layering the rhizomes in slightly damp peat moss, perlite, or wood shavings. This prevents them from drying out completely without making them so wet that they rot.
Winter Environment
Store the box in a cool, dark, dry place where the temperature stays between 40°F and 50°F. An unheated basement, a crawl space, or a cool closet usually works well. Check on them once or twice during the winter. If the rhizomes look shriveled, mist the packing material with a little water. If any look soft or rotten, remove them immediately to keep the rest of the batch healthy.
Troubleshooting Common Issues
Even though cannas are generally easy to grow, you might occasionally run into a few hurdles. Most issues are easily solved by adjusting the plant's environment.
Why Won't My Cannas Bloom?
If your plants have beautiful leaves but no flowers, the most common culprit is a lack of sunlight. Remember, they need at least 6 hours of direct sun. Another possibility is that the soil is too cool or the plant isn't getting enough nutrients. Ensure you are watering regularly and providing a balanced fertilizer.
Leaf Issues
If the leaves are looking tattered, check for wind damage or common garden pests like slugs or caterpillars. In some warmer regions, "canna leafrollers" can be a nuisance. These are small caterpillars that roll the leaves shut to hide inside. Simply keeping an eye on your plants and removing any affected leaves early on can usually keep the problem under control. Consult your local extension service if you need specific pest management advice for your area.
Slow Growth
If your cannas aren't growing as fast as you expected, remember that they are tropical. They often sit quietly in the ground until the weather truly heats up. Once the nights stay warm and the days are hot, you will see a dramatic increase in their growth rate. Patience is often the best remedy!
Key Takeaway: Most canna issues can be resolved with more sun, more water, or warmer weather. If your plant is struggling, try moving it to a sunnier spot or increasing your watering schedule.
Designing with Cannas
Cannas are versatile design elements that can fit into many different garden styles. Because they offer both height and color, they are often the "backbone" of a summer display.
Companion Planting
To create a layered look, pair your canna flowers bulbs with other sun-loving plants.
- For a tropical theme: Plant them alongside dahlias, elephant ears (Colocasia), and hibiscus.
- For a texture contrast: Pair the broad leaves of cannas with the airy textures of ornamental grasses or the fine foliage of cosmos.
- For a color explosion: Match the flower colors of your cannas with zinnias, marigolds, or salvia.
Using Cannas as Screens
If you have an area of your yard that feels too exposed, a row of tall cannas can provide a fast-growing, beautiful summer privacy screen. They fill in quickly and create a lush wall of green or bronze foliage that blocks out the neighbors while adding beauty to your space.
The Longfield Gardens Guarantee
We take great pride in the quality of the plants we ship from our facility in Lakewood, New Jersey. When you order from us, you can do so with confidence. We stand behind our products with a 100% quality guarantee. We promise that your items will arrive in prime condition and be true to the variety you ordered.
If you notice any damage or quality issues upon delivery, please contact our responsive customer service team right away so we can make it right. If a plant fails to perform during its first growing season, we may provide a replacement or store credit depending on the situation. We want you to love your garden as much as we love ours, and we are here to support you every step of the way.
Conclusion
Growing canna flowers bulbs is a rewarding way to add high-impact color and a touch of the tropics to your home. By matching the right variety to your space, waiting for warm soil, and providing plenty of sun and water, you can enjoy a spectacular display from midsummer all the way to the first frost. Whether you grow them in large garden borders or compact patio pots, these resilient plants offer a big payoff for very little effort.
- Wait for warm soil (at least 60°F) before planting outdoors.
- Provide 6 to 8 hours of direct sunlight for the best blooms.
- Keep the soil consistently moist and fertilize monthly.
- In cold climates, lift and store the rhizomes for the winter.
Ready to transform your garden into a tropical oasis? Start by selecting your favorite colors and heights from our canna collection, and enjoy the beauty of these stunning summer bloomers.
FAQ
When should I plant canna flowers bulbs?
The best time to plant is in late spring after the danger of frost has passed and the soil has warmed to about 60°F. If you live in a northern climate, you can start them indoors in pots about a month before the last frost to get a head start on the season.
Do cannas need full sun to bloom?
Yes, cannas perform best when they receive at least 6 to 8 hours of direct sunlight each day. While they can grow in partial shade, you will likely see fewer flowers and the foliage may not be as vibrant as it would be in a sunnier location.
How often should I water my cannas?
Cannas love moisture and should be watered whenever the top inch of soil feels dry. During the hottest parts of the summer, this may mean watering once or twice a week for plants in the ground, or even daily for those grown in containers.
Can I leave canna bulbs in the ground during winter?
This depends on your location. If you live in USDA zones 8 through 11, cannas can typically stay in the ground year-round. In colder zones (3 through 7), you should dig up the rhizomes after the first frost and store them in a cool, dry place until spring.