Introduction
There is a special kind of excitement that comes with watching a canna lily unfurl its first massive, paddle-shaped leaf. These plants are the undisputed heavyweights of the summer garden, bringing a lush, tropical energy that few other perennials can match. Whether you love them for their brilliant orchid-like blooms or their dramatic, multicolored foliage, cannas are a joy to grow because they are resilient, fast-growing, and undeniably bold.
At Longfield Gardens, we believe every great plant deserves equally great neighbors. Choosing the right companions for your canna lilies is about more than just looks; it is about matching plants that share a love for the sun and a thirst for water. When you pair cannas with the right partners, you create a garden that feels like a professional landscape, full of layers, textures, and non-stop color.
In this guide, we will explore the best foliage and flowering plants to grow alongside your canna lilies. Whether you are planting in a large backyard border or a decorative patio container, these pairings will help you make the most of your growing season. We want to help you create a garden that feels like a vacation right in your own backyard.
Understanding What Cannas Need in a Neighbor
Before we dive into specific plant names, it is helpful to understand the "personality" of a canna lily. This makes it much easier to choose neighbors that will thrive. Cannas are high-energy plants. They love heat, they crave direct sunlight (at least six to eight hours a day), and they are quite thirsty.
Because we want our gardens to be low-stress and high-reward, it is best to choose companions that enjoy these same conditions. If you plant a shade-loving hosta next to a sun-loving canna, one of them will likely be unhappy. Instead, we look for "sun-seekers" that can handle the same rich soil and frequent watering that cannas require.
The growth habit of cannas is also a key factor. Most varieties are tall and vertical. They have "stately" presence, which means they often leave some open space near the ground. This gives us a perfect opportunity to plant mid-sized "fillers" and low-growing "spillers" to create a full, lush look from top to bottom.
Key Takeaway: Match your canna lilies with plants that love full sun and consistent moisture. This ensures all your plants stay healthy without requiring different care routines in the same bed.
The "Thriller, Filler, Spiller" Framework
One of the easiest ways to design a beautiful garden bed or container is to use the "Thriller, Filler, Spiller" method. This is a simple formula that ensures your arrangement has height, bulk, and movement.
The Canna as the Thriller
In almost every scenario, the canna lily is your "Thriller." It provides the height and the "wow" factor. Whether you choose a tall variety that reaches six feet or a dwarf variety that stays around two or three feet, the canna is the focal point.
Choosing Your Fillers
Fillers are the plants that surround the base of your canna. They hide the stems and add a mound of color or interesting texture. Great fillers include dahlias, zinnias, and lantana. They bridge the gap between the tall cannas and the ground.
Adding the Spiller
Spillers are the finishing touch. These are plants that trail over the edge of a pot or spread along the soil surface. Sweet potato vines and trailing petunias are classic choices. They soften the edges of your design and make the entire arrangement look established and lush.
Best Foliage Companions for Dramatic Contrast
Canna lilies are famous for their leaves. Some are solid green, some are a deep, chocolatey bronze, and others, like the "Pretoria" or "Tropicana" varieties, feature stunning stripes of gold, orange, and lime. To make these leaves pop, we want to choose companions with contrasting foliage.
Coleus: The Color Echo
Coleus is perhaps the most versatile companion for canna lilies. Because coleus comes in hundreds of colors, you can find a variety that "echoes" the colors in your canna leaves. For example, if you are growing a canna with bronze leaves, a coleus with burgundy and lime-green foliage will look spectacular next to it. Coleus loves the same moist, fertile soil as cannas and will grow quickly to fill in any gaps.
Elephant Ears (Alocasia and Colocasia)
If you want to lean into the tropical theme, elephant ears are a natural choice. Their massive, heart-shaped leaves provide a different "scale" than the upright canna leaves. Planting dark-leaved elephant ears next to bright green cannas creates a sophisticated, high-contrast look that feels very high-end.
Caladiums
While many caladiums prefer shade, there are many modern varieties bred to handle the sun. Caladiums offer delicate, heart-shaped leaves in shades of white, pink, and red. They stay relatively low to the ground, making them excellent fillers. A white-leaved caladium planted at the base of a red-flowering canna creates a crisp, clean look that brightens up the garden.
Sweet Potato Vine (Ipomoea)
This is the ultimate "spiller." Sweet potato vines come in bright chartreuse (lime green) or deep purple. The chartreuse variety is especially effective at the feet of dark-leaved cannas like "Australia." The bright color makes the dark leaves look even deeper and more dramatic.
What to do next:
- Identify the main color in your canna’s leaf (green, bronze, or variegated).
- Choose one foliage companion in a contrasting color (e.g., lime green to go with dark bronze).
- Plant the companion about 12 inches away from the canna to allow room for both to spread.
Flowering Neighbors for Non-Stop Summer Color
Cannas bloom from mid-summer through the first frost, but adding other flowers to the mix ensures there is always something new to look at. We look for flowers that can handle the "dog days" of summer heat just as well as the cannas do.
Dahlias
Dahlias and cannas are a match made in gardening heaven. They both grow from underground structures (rhizomes for cannas, tubers for dahlias) and have similar needs. Since dahlias come in almost every color and shape imaginable, you can create a very specific color palette. Try planting dinnerplate dahlias slightly in front of your cannas. The massive dahlia blooms nestled against the bold canna foliage look like something out of a botanical garden.
Lantana
Lantana is a "workhorse" in the summer garden. It is incredibly heat-tolerant and produces clusters of small, bright flowers that attract butterflies. Lantana tends to grow in a mounding shape, making it a perfect filler. The warm oranges and yellows of many lantana varieties look beautiful with the tropical tones of canna lilies.
Hibiscus
For a truly exotic look, plant hardy or tropical hibiscus nearby. The giant, saucer-shaped flowers of the hibiscus complement the orchid-like blooms of the canna. Because both plants can grow quite large, make sure to give them enough space so they don't crowd each other out.
Zinnias and Marigolds
If you are looking for an easy, budget-friendly option, zinnias and marigolds are fantastic choices. You can sow zinnia seeds directly into the soil around your cannas in late spring. By the time the cannas are tall, the zinnias will be providing a carpet of color at their feet. They are also excellent for cutting and bringing indoors.
Using Texture: Wispy Grasses and Fine Foliage
Because canna leaves are so large and solid, they can sometimes look a bit "heavy" if they are the only thing in the bed. We can balance this by adding plants with fine, wispy, or airy textures. This contrast makes the canna leaves look even more impressive.
Ornamental Grasses
Grasses like Fountain Grass (Pennisetum) or Maiden Grass (Miscanthus) add movement to the garden. While cannas stand still and sturdy, grasses sway in the breeze. The fine blades of the grass provide a beautiful textural "break" from the broad canna leaves. Planting a tall grass behind a group of cannas creates a layered, professional look.
Verbena bonariensis
This plant is often called "Tall Verbena." It produces slender, wiry stems topped with clusters of tiny purple flowers. Because the stems are so thin, you can actually see through the plant. This "see-through" quality is wonderful when planted in front of cannas. It adds a haze of purple without hiding the beautiful canna foliage behind it.
Cosmos
Cosmos have feathery, fern-like foliage and delicate daisy-like flowers. They add a touch of whimsy and lightness to a canna planting. Like zinnias, they are very easy to grow from seed and will bloom all summer long if you occasionally snip off the faded flowers.
Pollinator-Friendly Pairings
Cannas are already great at attracting hummingbirds, especially the varieties with bright red or orange tubular flowers. You can turn your canna bed into a high-traffic pollinator station by adding other nectar-rich plants.
- Salvia: Specifically the taller blue or purple varieties. Hummingbirds and bees love salvia, and the cool purple tones provide a lovely contrast to the hot reds and oranges of most cannas.
- Bee Balm (Monarda): This plant loves moist soil just as much as cannas do. Its unique, shaggy flowers add a fun shape to the garden and are a favorite of bees.
- Agastache: Also known as Hyssop, this plant has a licorice-like scent and spikes of flowers that pollinators can't resist. It is very heat-tolerant and thrives in the same sunny spots as cannas.
Creating Privacy and Hedges
One of our favorite ways to use canna lilies is as a "living screen." Because they grow so fast and so tall, they are perfect for hiding a plain fence or creating a bit of privacy for a patio.
To create a lush, impenetrable hedge, we suggest staggering your plantings. Instead of a single straight row, plant two rows in a "zigzag" pattern. In the gaps between the cannas, you can add other tall, fast-growing plants like:
- Sunflowers: The classic tall garden plant. Sunflowers and cannas together create a wall of gold and green.
- Amaranth: Varieties like "Love-Lies-Bleeding" have dramatic, drooping red flower tassels that look incredible next to bronze-leaved cannas.
- Joe Pye Weed: A tall native perennial that produces massive clouds of pinkish-purple flowers in late summer. It loves moist soil, making it a perfect partner for cannas in a damp corner of the yard.
Container Gardening Combinations
Not everyone has room for a 60-foot hedge of cannas. Fortunately, cannas are spectacular in pots. When planting in containers, the "Thriller, Filler, Spiller" rule is even more important because the plants are so close together.
For a successful canna container, we recommend a large pot—at least 18 to 20 inches in diameter. This gives the canna roots room to grow and prevents the pot from drying out too quickly.
A guide to planting canna bulbs in containers can help you plan the pot, soil, and watering routine.
A Sample Container Recipe:
- The Thriller: One "Canna Tropicana" (stripy leaves, orange flowers).
- The Filler: Two burgundy Coleus and one yellow Lantana.
- The Spiller: Two lime-green Sweet Potato Vines.
This combination provides a riot of color and texture that will look great from June until October. Just remember that plants in containers need more frequent watering and a little extra fertilizer to keep them looking their best.
Managing the Garden Layout
When you are placing your plants, remember that canna lilies are "space-takers." A single rhizome can grow into a substantial clump by the end of the summer. We generally recommend spacing cannas about 12 to 18 inches apart.
If you are inter-planting with perennials, give the cannas enough room so they don't shade out their neighbors too early in the season. A good rule of thumb is to place your shorter companions on the south or west side of the cannas so they get the most sun before the cannas reach their full height.
Simple Arrangement Guide:
- Place tall cannas or grasses in the back (if against a wall) or the center (if visible from all sides).
- Surround them with mid-sized fillers like dahlias or coleus.
- Edge the bed or pot with spillers like sweet potato vine or petunias.
- Water deeply after planting to help everyone settle in.
For seasonal timing and delivery details, review Longfield Gardens’ shipping information.
Conclusion
Canna lilies are more than just a plant; they are a statement. By pairing them with the right companions, you can amplify that statement and create a garden that feels vibrant, energetic, and full of life. Whether you choose the fine texture of ornamental grasses, the bold colors of coleus, or the pollinator-attracting power of salvia, the key is to have fun and experiment.
At Longfield Gardens, we take pride in providing high-quality bulbs and rhizomes that help you achieve these beautiful results. Gardening is a journey, and every season is an opportunity to try a new combination. Start with what you love, match the plant's needs to your spot, and watch your tropical oasis grow.
- Cannas are the perfect "thriller" for any sun-drenched garden or large pot.
- Pair them with heat-loving companions like dahlias, lantana, and coleus for a lush look.
- Use fine-textured plants like grasses to balance the bold, broad leaves of the canna.
- Keep your plants happy with consistent water and plenty of sunshine.
"The most successful gardens are those where plants support one another. By matching the tropical needs of cannas with equally sun-loving neighbors, you ensure a season of effortless beauty."
We encourage you to look through our selection of canna collections and companion plants to start planning your most colorful summer yet.
FAQ
What are the best low-growing plants to put in front of canna lilies?
Sweet potato vines, trailing petunias, and alyssum are excellent "spillers" that sit close to the ground. For slightly taller "fillers" that stay under two feet, consider dwarf zinnias, marigolds, or sun-tolerant coleus. These plants help hide the base of the canna stems and create a full, finished look.
Can I plant canna lilies with shade-loving plants like hostas?
It is generally not recommended because cannas need at least six hours of direct sunlight to bloom and grow strong. Most hostas would scorch in that much sun. If you have a spot with partial shade, you might have success with sun-tolerant hostas or caladiums, but the cannas may not bloom as vigorously as they would in full sun.
Do canna lilies and dahlias grow well together?
Yes, they are excellent companions. Both plants love full sun, rich soil, and plenty of water. They also follow a similar life cycle in cooler climates, where both the canna rhizomes and dahlia tubers need to be lifted and stored indoors for the winter. Their flowers and foliage complement each other perfectly for a high-summer display.
Are there any plants I should avoid planting near cannas?
Avoid planting slow-growing or very delicate plants that might be easily "swallowed up" by the canna’s rapid growth. Cannas can grow an inch a day in mid-summer, so their neighbors needs to be vigorous enough to hold their own. Also, avoid plants that prefer dry, sandy soil, as the canna's need for frequent water will likely be too much for them.
