Table of Contents
- Introduction
- Understanding Canna Plant Bulbs
- Choosing the Best Spot for Your Cannas
- When to Plant Canna Plant Bulbs
- How to Plant Canna Plant Bulbs
- Essential Care and Maintenance
- Growing Cannas in Containers
- Managing Common Canna Challenges
- Storing Canna Bulbs for Winter
- Popular Canna Varieties to Consider
- Conclusion
- FAQ
Introduction
There is a unique kind of excitement that comes with watching a tropical garden wake up in the middle of a backyard. For many of us, the sight of lush, oversized leaves and vibrant, glowing flowers brings an immediate sense of vacation right to our doorsteps. Canna plant bulbs are the secret to this dramatic transformation, offering a bold presence that few other summer-blooming plants can match.
At Longfield Gardens, we enjoy helping gardeners bring this exotic flair to their own outdoor spaces with our Cannas Bulbs for Sale. Whether you have a sprawling garden bed or a cozy balcony with space for a few pots, these plants are remarkably easy to grow and reward you with color that lasts from midsummer until the first frost. They are resilient, heat-loving, and perfect for anyone looking to add high-impact texture to their landscape.
This guide will walk you through everything you need to know about choosing, planting, and caring for your cannas. For a broader overview, see our All About Cannas. We will cover the best planting times, how to ensure your plants thrive in the summer heat, and the simple steps for storing them over the winter. By following these practical tips, you can enjoy a stunning, tropical-inspired garden all season long.
Understanding Canna Plant Bulbs
While most people refer to them as canna plant bulbs, these plants actually grow from something called a rhizome. A rhizome is a thick, fleshy underground stem that stores energy for the plant. If you look at one, it might remind you of a piece of ginger root. It has several "eyes" or growth points where the new stems will emerge.
These rhizomes are incredibly efficient at storing nutrients, which is why cannas grow so quickly once the weather warms up. They are native to tropical and subtropical regions, which explains their love for sunshine and moisture. In the garden, these sturdy structures allow the plant to produce tall, strong stalks and those famous, banana-like leaves.
When you receive your canna rhizomes from us, they should feel firm to the touch. You might even see small, colorful nubs starting to peek out from the surface. These are the sprouts getting ready to grow. Even if you don't see sprouts right away, the energy stored inside the rhizome is ready to go as soon as it hits warm, moist soil.
Key Takeaway: Canna "bulbs" are actually rhizomes. These thick underground stems store all the energy the plant needs to produce rapid growth and vibrant summer flowers.
Choosing the Best Spot for Your Cannas
Success with cannas starts with finding the right location. Because they are tropical in nature, their requirements are quite straightforward. If you give them what they need, they will grow vigorously with very little extra effort on your part.
Sunlight is Essential
Cannas are true sun-worshippers. To get the best leaf color and the most flowers, you should plant them in a spot that receives at least six to eight hours of direct sunlight every day. In cooler northern climates, full sun is non-negotiable. If you live in an extremely hot southern climate, they can handle a little bit of afternoon shade, but too much shade will result in "leggy" plants that don't bloom as well.
Soil and Drainage
"Drainage" refers to how fast water leaves the soil after rain or watering. While cannas love moisture, they do not like to sit in stagnant, soggy water, which can cause the rhizome to rot. The ideal soil is rich in organic matter, like compost, and holds moisture well while still allowing excess water to move through. If you have heavy clay soil, you can improve it by mixing in some compost or aged manure before planting.
Space to Grow
Before you dig your first hole, consider the mature size of the variety you have chosen. Standard cannas can reach heights of 4 to 6 feet, while dwarf varieties usually stay around 2 to 3 feet. For taller plantings, see our Tall Cannas collection. Make sure you aren't planting them in a spot where they will block the view of smaller plants or get too crowded. They need good air circulation to keep their foliage looking its best.
What to do next:
- Observe your garden for a full day to identify the sunniest spots.
- Check the soil after a rainstorm to ensure water doesn't pool for hours.
- Clear away any weeds or old debris from your chosen planting area.
When to Plant Canna Plant Bulbs
Timing is the most important factor when it comes to planting cannas. Because they are sensitive to cold, you must wait for the right conditions. Planting too early into cold, wet soil is one of the few ways to hinder their success.
Wait for Warm Soil
The golden rule for cannas is to wait until the danger of frost has passed and the soil has warmed up. Ideally, the soil temperature should be at least 60°F. In most parts of the United States, this happens in late spring or early summer, around the same time you would plant tomatoes or basil. If the ground is still chilly, the rhizomes will simply sit dormant and won't start growing.
Starting Indoors
If you live in a region with a short growing season, you can give your cannas a head start by starting them indoors. If you're not sure which zone you're in, our Hardiness Zone Map is a helpful reference. About four to six weeks before the last expected frost, plant the rhizomes in pots with quality potting soil. Keep the pots in a warm, sunny window or under grow lights. By the time the weather is warm enough to move them outside, you will already have established plants ready to take off.
Shipping and Arrival
We time our shipments at Longfield Gardens based on your USDA hardiness zone. For details, see our Shipping Information page. This ensures your canna plant bulbs arrive approximately two weeks before the ideal planting time for your specific area. This gives you a little time to prepare your garden beds while the weather finishes warming up.
How to Plant Canna Plant Bulbs
Planting cannas is a simple process that sets the foundation for the entire growing season. You don't need any special tools—just a garden trowel and a little bit of patience.
Preparing the Soil
Start by loosening the soil in your planting area to a depth of about 8 to 10 inches. This makes it easier for the new roots to spread out and establish themselves. If your soil is a bit lean, this is the perfect time to mix in a shovelful of compost.
Proper Depth and Spacing
Dig a hole about 4 inches deep. Place the canna rhizome in the hole horizontally. Look for the "eyes" or sprouts and point them upward. If you can’t tell which side is the top, don't worry—the plant is smart enough to find its way toward the light. Cover the rhizome with soil and press down gently to remove any large air pockets.
For spacing, give taller varieties about 18 to 24 inches of room. Smaller, dwarf varieties can be planted closer together, about 12 inches apart. Proper spacing ensures each plant gets enough sunlight and reduces the chance of moisture-related leaf issues later in the season.
Initial Watering
Immediately after planting, give the area a good soak. This "settles" the soil around the rhizome and wakes the plant up. You won't need to water constantly until you see the first green shoots emerging from the ground. Once the plants are a few inches tall, you can begin a more regular watering schedule.
Key Takeaway: Plant canna rhizomes 4 inches deep and 1 to 2 feet apart. Always wait until the soil is warm and the threat of frost is completely gone.
Essential Care and Maintenance
Once your cannas are up and growing, they are relatively low-maintenance. However, a few simple chores will keep them looking lush and blooming continuously until fall.
Watering for Success
Cannas are "thirsty" plants. Because they produce so much foliage and large flowers in a short amount of time, they require a steady supply of water. During the heat of summer, they may need to be watered a few times a week, especially if it hasn't rained. The goal is to keep the soil consistently moist but not swampy. If the edges of the leaves start to look crispy or brown, it is often a sign that the plant needs more water.
Mulching
Applying a 2-inch layer of mulch around the base of your cannas is one of the best things you can do for them. Mulch helps the soil retain moisture, keeps the roots cool during heatwaves, and prevents weeds from competing for nutrients. Use shredded bark, compost, or even clean straw. Just be sure to keep the mulch a couple of inches away from the actual stems to prevent any moisture buildup against the plant.
Feeding Your Plants
Because cannas grow so fast, they benefit from regular feeding. You can use a balanced, water-soluble fertilizer or a slow-release granular variety. Look for a fertilizer that is slightly higher in phosphorus (the middle number on the package) to encourage more blooms. A monthly feeding during the growing season is usually plenty to keep them energized.
Deadheading
"Deadheading" is the process of removing spent flowers. On a canna plant, the flowers grow in clusters at the top of a stalk. When a single flower fades, you can simply pinch it off. Once the entire flower stalk has finished blooming, cut the stalk back to the next side branch or where it meets the foliage. This keeps the plant looking tidy and encourages it to produce new flower spikes.
For more creative ideas, see our Fresh Ideas for Growing Cannas in Your Garden.
What to do next:
- Check the soil moisture every few days by sticking your finger an inch into the ground.
- Apply a fresh layer of mulch once the plants are about 6 inches tall.
- Remove faded flowers weekly to keep the display looking fresh.
Growing Cannas in Containers
If you don't have a large garden plot, our How to Plant Canna Lily Bulbs in Pots guide is a helpful companion, and canna plant bulbs are excellent candidates for container gardening. They add height and a tropical feel to patios, decks, and even front porches.
Choosing the Right Pot
Cannas have vigorous root systems, so you need a substantial container. A pot that holds at least 5 to 10 gallons is a good starting point for a single standard canna. For dwarf varieties, Short Cannas are a great fit. Make sure the container has drainage holes at the bottom so excess water can escape.
Potting Mix Matters
Never use garden soil in a container. It is too heavy and will compact, preventing the roots from getting the air they need. Instead, use a high-quality potting mix designed for containers. These mixes usually contain peat moss, perlite, or coconut coir to ensure the right balance of moisture retention and drainage.
Watering and Nutrients in Pots
Plants in containers dry out much faster than those in the ground. During the peak of summer, you might need to water your potted cannas every day. Additionally, because you are watering frequently, nutrients tend to wash out of the soil. Feeding your potted cannas every two weeks with a liquid fertilizer will ensure they have the "fuel" they need to keep blooming.
Key Takeaway: Use large pots with drainage holes and high-quality potting mix. Potted cannas need more frequent watering and fertilizing than those planted in the ground.
Managing Common Canna Challenges
While cannas are generally robust, you might occasionally run into a few minor issues. Most problems are easily solved with a bit of observation and simple action.
Canna Leafrollers
In some regions, you might notice the leaves of your cannas staying rolled up or appearing "stitched" together with silk. This is often the work of the canna leafroller, a small caterpillar. The best way to handle them is to keep an eye on your plants early in the season. If you see rolled leaves, you can gently unroll them and remove the caterpillar, or simply snip off the affected leaf and dispose of it. Keeping the garden clean of debris at the end of the season also helps reduce their presence the following year.
Japanese Beetles
These beetles are attracted to many summer flowers, and cannas are no exception. They usually arrive in midsummer and chew holes in the foliage or flowers. The easiest solution for a home gardener is to walk through the garden in the morning and knock the beetles into a bucket of soapy water. They are less active when it is cool, making them easy to catch.
Leaf Spots and Rust
If you notice orange or brown spots on the leaves, your plants might have a fungal issue like rust. This often happens during periods of high humidity or if the leaves stay wet for too long. To prevent this, always water at the base of the plant rather than over the top of the foliage. If a few leaves are badly affected, you can remove them to help stop the spread.
Storing Canna Bulbs for Winter
One of the best things about canna plant bulbs is that they can be saved and replanted year after year. Unless you live in USDA zones 8 through 11 where the ground doesn't freeze, you will need to "lift" your rhizomes and store them for the winter.
When to Dig Them Up
Wait until the first frost of the autumn has blackened the foliage. This sends a signal to the plant to go dormant and move its energy down into the rhizome. Once the foliage is hit by frost, cut the stalks back to about 3 or 4 inches above the ground.
Digging and Cleaning
Carefully use a garden fork or shovel to lift the clump of rhizomes out of the ground. Be gentle so you don't bruise or cut the fleshy roots. Shake off the excess soil and let the rhizomes sit in a dry, shaded area (like a garage or porch) for a few days to "cure" or dry out slightly. You don't need to wash them; a little bit of clinging soil is fine.
The Best Storage Conditions
Store your canna rhizomes in a cool, dark, and dry place where temperatures stay between 40°F and 50°F. An unheated basement or a crawlspace is often perfect. You can place the rhizomes in a cardboard box or a plastic bin with some ventilation holes. Many gardeners find success by layering the rhizomes in slightly damp peat moss, vermiculite, or wood shavings. This keeps them from drying out completely without making them wet enough to rot.
Checking During Winter
Take a quick peek at your stored bulbs once a month. If they look shriveled, you can lightly mist the packing material with a bit of water. If you see any soft or mushy spots, remove those specific rhizomes so they don't affect the others. In the spring, you can divide the large clumps into smaller pieces, ensuring each piece has at least one or two "eyes," and start the process all over again.
What to do next:
- Mark your calendar for the first expected frost date in your area.
- Gather storage supplies like cardboard boxes and peat moss in late summer.
- Label your rhizomes by color or variety name before putting them into storage.
Popular Canna Varieties to Consider
Choosing which cannas to plant is the most fun part of the process, and our Canna Assorted Collection makes it easy to get started. There are varieties for every taste, ranging from subtle and elegant to loud and neon-bright.
- Tropicanna: This is a fan favorite for a reason. It features extraordinary foliage with stripes of burgundy, gold, and green, topped with bright orange flowers. Even when it isn't blooming, the leaves are a showstopper.
- Black Knight: If you love drama, this variety offers deep, dark bronze-burgundy foliage that looks almost black. The flowers are a rich, velvety red, creating a stunning contrast.
- Stuttgart: For something unique, Stuttgart has variegated leaves with large patches of creamy white and green. Because the white parts of the leaves can sunburn, this variety actually prefers a bit of afternoon shade.
- Miss Oklahoma: A classic choice with soft, watermelon-pink flowers and clean green foliage. It is a tall, stately variety that looks beautiful at the back of a flower bed.
- Dwarf Varieties: If you are gardening in containers or have a small border, look for dwarf mixes. These give you all the tropical beauty of standard cannas but stay in a compact 2-to-3-foot tall package.
Conclusion
Canna plant bulbs are a rewarding investment for any gardener looking to add a splash of the tropics to their home. They are one of the most reliable ways to achieve height, texture, and brilliant color during the hottest months of the year. By choosing a sunny spot, waiting for the soil to warm up before planting, and providing plenty of water, you can enjoy these magnificent plants with very little stress.
At Longfield Gardens, we take pride in providing high-quality rhizomes that are ready to perform in your garden, all backed by our 100% Quality Guarantee. Whether you are planting them in a dedicated tropical bed or as a bold accent in a container, cannas bring a sense of joy and abundance to the landscape. We are here to support your gardening journey with quality plants and practical advice every step of the way.
Next Steps:
- Choose your favorite colors and leaf patterns to match your garden's style.
- Prepare your sunny garden beds with a bit of compost.
- Get ready to enjoy a summer filled with vibrant, tropical blooms.
"Gardening with cannas is about more than just flowers; it's about creating an atmosphere of lush, vibrant life that thrives in the summer sun."
FAQ
Can I leave my canna bulbs in the ground over winter?
If you live in USDA zones 8 through 11, cannas are usually hardy enough to stay in the ground year-round. In these warmer climates, you can simply cut back the dead foliage in early winter and apply a layer of mulch for protection. However, in zones 7 and colder, the ground freezes deep enough to damage the rhizomes, so they must be dug up and stored indoors.
How long does it take for cannas to bloom after planting?
Cannas typically begin to bloom about 10 to 12 weeks after they are planted in warm soil. If you start them indoors in pots a few weeks before the last frost, you can often see flowers even sooner. The bloom season is quite long, usually extending from midsummer all the way until the first frost of autumn.
Why are the leaves on my canna plants turning brown at the edges?
Brown, crispy edges on canna leaves are usually a sign of "leaf scorch," which happens when the plant isn't getting enough water to keep up with the heat. Cannas have very large leaves that lose moisture quickly in the sun. Increasing your watering frequency and applying a thick layer of mulch to keep the roots moist will usually solve this issue.
Do I need to soak canna rhizomes before planting them?
While some gardeners like to soak their rhizomes in lukewarm water for a few hours before planting to "wake them up," it is not strictly necessary. As long as you water them well immediately after planting into warm soil, they will naturally absorb the moisture they need to begin growing. If the rhizomes feel particularly dry or shriveled when they arrive, a short soak can be helpful.