Table of Contents
- Introduction
- Can You Grow Canna Lily Indoors?
- Why Canna Lilies Are Optional Dormancy Plants
- Choosing the Best Varieties for Indoor Growing
- Essential Conditions for Indoor Success
- How to Plant Canna Rhizomes Indoors
- Watering and Feeding Your Indoor Canna
- Pruning and Maintenance for Continuous Growth
- Troubleshooting Common Indoor Issues
- Transitioning Your Canna Outdoors and Back
- Summary of Success Rules for Indoor Cannas
- Conclusion
- FAQ
Introduction
Imagine looking out your window at a snowy landscape while a vibrant, tropical canna lily blooms on your windowsill. These plants are famous for their bold, banana-like leaves and brilliant flowers that usually decorate summer gardens. Bringing that same tropical energy inside your home is a rewarding way to enjoy garden beauty all year long.
At Longfield Gardens, we want to help you bring more color into your life, whether that is in your backyard or your living room. Growing canna lilies indoors is a fantastic project for any gardener who loves high-impact foliage and exotic flowers. This guide is for home gardeners who want to keep their cannas growing through the winter or start their spring garden a few weeks early.
You do not need a greenhouse to be successful with these plants inside. With the right amount of light, consistent water, and a bit of warmth, you can enjoy these tropical beauties in any room of your house. Growing canna lilies indoors is not only possible, but it is also a simple way to create a lush, indoor sanctuary.
Can You Grow Canna Lily Indoors?
The short answer is a resounding yes. While most people think of canna lilies as strictly outdoor summer plants, they adapt beautifully to life inside a home. In their native tropical environments, cannas grow in warm, moist areas where they never experience a frost. This means they are naturally wired to keep growing as long as the conditions remain favorable.
Unlike many other bulbs that require a cold period to reset, cannas do not have a mandatory "sleep" schedule. You can treat them much like any other large-leafed houseplant, such as a bird of paradise or a large philodendron. The main difference is that cannas will reward you with spectacular flower spikes in shades of red, orange, yellow, and pink.
Growing them indoors offers two main paths. You can either keep them as year-round houseplants or use your indoor space to "wake them up" early in the spring. Both methods work well and allow you to enjoy the plants for much longer than the standard summer season. If you have a bright spot and a large enough pot, you have everything you need to get started.
Why Canna Lilies Are Optional Dormancy Plants
One of the most interesting facts about canna lilies is that their dormancy is optional. Most temperate bulbs, like tulips or daffodils, must go through a cold period to bloom again the following year. If you kept a tulip in a warm room all year, it would eventually stop growing and fail. Cannas are different because they are tropical rhizomes.
In the wild, cannas often grow in marshes and wetlands across Central and South America. They only go dormant if the soil dries out completely during a drought or if the temperature drops too low. If you keep the soil moist and the air warm, the plant assumes it is still the growing season. It will continue to push out new leaves and flower stalks indefinitely.
This unique trait makes them perfect for indoor gardening. You do not have to worry about digging them up and storing them in a dark basement if you don't want to. As long as you provide the essentials, your canna will happily bypass its winter nap. This is a great "easy win" for gardeners who want a high-impact plant without the stress of complex storage requirements.
Key Takeaway: Canna lilies are tropical plants that only go dormant when they experience cold or drought. By keeping them warm and watered indoors, you can enjoy their foliage and flowers throughout the year.
Choosing the Best Varieties for Indoor Growing
When you are growing plants inside, space is usually your primary consideration. Some wild canna varieties can reach heights of six to eight feet, which might be a bit much for a standard living room. Fortunately, there are many dwarf and compact cultivars that stay at a much more manageable size.
Focus on Compact Cultivars
For indoor success, look for varieties labeled as "dwarf" or "compact." These typically reach a mature height of two to three feet. They provide all the visual drama of their taller cousins but fit comfortably on a plant stand or a low table. These smaller types also tend to bloom more quickly than the giant varieties.
Foliage Colors Matter
Since you will be looking at the plant every day, consider the foliage as much as the flowers. Some cannas have solid green leaves, while others feature deep burgundy, bronze, or even variegated patterns with white and yellow stripes. A variegated variety like Canna Tall Pretoria or a dark-leaved variety like Canna Tall Tropicanna Black looks like a work of art even when it isn't in bloom.
Recommended Types
We recommend looking for the "Tropical" or "Cannova" series. These were specifically bred to be uniform, compact, and heavy bloomers. They are perfect for containers and adapt well to the lower humidity levels often found inside homes. Varieties like Canna Tall Tropicanna or Canna Tall Tropicanna Gold are also excellent choices for indoor pots.
Essential Conditions for Indoor Success
To make your canna lily feel at home, you need to mimic its natural tropical environment. This involves balancing light, temperature, and humidity. While cannas are resilient, getting these three factors right will ensure you get those famous flowers rather than just green leaves.
Maximum Light is Key
Light is the most important factor for indoor cannas. In a garden, they usually want six to eight hours of direct sunlight. Inside, you should place your pot in the brightest window you have. A south-facing window is usually the best choice in the Northern Hemisphere.
If your home doesn't get enough natural light, don't worry. Cannas respond very well to LED grow lights. Placing a full-spectrum light a few inches above the foliage for 12 to 14 hours a day can make up for a lack of sun. If the plant starts to look "leggy" (tall and thin with wide spaces between leaves), it is likely asking for more light.
Warm Temperatures
Cannas love warmth. They grow best when indoor temperatures stay above 65°F. They are very sensitive to cold drafts, so keep them away from air conditioning vents or drafty windows during the winter. If the room feels comfortable to you in a T-shirt, it is likely a good temperature for your canna.
Managing Humidity
Standard indoor air can be a bit dry for a plant that naturally grows in a swamp. You can increase the humidity around your canna lily by:
- Grouping several plants together.
- Placing the pot on a tray filled with pebbles and water.
- Using a small humidifier nearby.
- Misting the leaves occasionally with a spray bottle.
How to Plant Canna Rhizomes Indoors
If you are starting with bare rhizomes, the planting process is straightforward. A rhizome is a thick, horizontal root that stores energy for the plant. Getting the depth and spacing right from the start will set your plant up for a healthy life.
Select the Right Container
Choose a pot that is at least 12 to 15 inches wide and just as deep. Cannas grow quickly and have vigorous root systems. A heavy ceramic or terra cotta pot is a good choice because it provides stability. Tall cannas can become top-heavy, and you don't want the pot to tip over as the plant grows. Ensure the pot has at least one large drainage hole at the bottom.
Soil and Drainage
Use a high-quality, well-draining potting mix. Avoid using garden soil, which is too heavy and can trap too much moisture around the rhizome. You want a mix that stays moist but allows excess water to flow away. Adding a handful of perlite or coarse sand to a standard potting mix can help improve drainage even further.
Planting Depth
Fill your container about two-thirds full with soil. Lay the rhizome horizontally on the surface. Look for small bumps or sprouts, often called "eyes." These should face upward. Cover the rhizome with about three to four inches of soil. Press down gently to remove large air pockets, then water the pot thoroughly until water runs out the bottom.
What to do next:
- Check your rhizomes for "eyes" before planting.
- Choose a heavy pot to prevent tipping.
- Use a potting mix that includes perlite or coco coir.
- Water immediately after planting to wake up the rhizome.
Watering and Feeding Your Indoor Canna
Because cannas are naturally swamp-dwellers, they have different water needs than your average succulent or cactus. They do not like to dry out completely. However, they also shouldn't sit in stagnant, smelly water.
The "Deep Water" Method
Instead of giving your plant a small sip every day, water it deeply until the excess drains out. Wait until the top inch of soil feels dry to the touch before watering again. If the leaves start to develop brown, crispy edges, the plant might be thirsty. In the heat of summer, an indoor canna might need water every two or three days. In the winter, you can usually wait a bit longer.
Fertilizing for Blooms
Cannas are "heavy feeders," meaning they use a lot of nutrients to produce those large leaves and flowers. Since they are in a pot, they rely entirely on you for food. Use a balanced, water-soluble fertilizer every two weeks during the spring and summer. In the winter, you can cut back to once a month since the plant's growth will naturally slow down a bit due to shorter days. For more on bloom timing, see how long it takes for canna bulbs to bloom.
Pruning and Maintenance for Continuous Growth
One of the secrets to keeping an indoor canna looking its best is regular pruning. Unlike a tree that grows from a single trunk, cannas send up multiple stems from the rhizome. Each individual stem will grow, bloom, and eventually finish its life cycle.
Deadheading Spent Flowers
When a flower cluster begins to fade, you should "deadhead" it. This means cutting off the spent flower stalk just above the highest leaf. This prevents the plant from wasting energy on seed production and encourages it to focus on the next set of blooms.
Removing Old Stems
Each canna stem typically produces two or three rounds of flowers. Once a stem has finished blooming completely, it will start to turn yellow or brown. This is normal. Cut the entire stem off at the base, near the soil line. This makes room for new, vibrant green shoots to emerge from the rhizome.
Cleaning the Leaves
Large leaves are magnets for household dust. Dust can block sunlight and reduce the plant's ability to photosynthesize. Once a month, wipe the leaves down with a damp cloth. This keeps the plant looking shiny and healthy while allowing it to breathe more easily.
Troubleshooting Common Indoor Issues
Even with the best care, you might run into a few minor hurdles. The key to troubleshooting is to change one thing at a time and observe the results. Most indoor canna issues are related to light or water.
Yellowing Leaves
If the lower leaves turn yellow, it is often just a sign of age. However, if many leaves turn yellow at once, check the soil moisture. Yellowing can be a sign of both overwatering and underwatering. If the soil is soggy and smells a bit sour, let it dry out more between waterings. If the soil is pulling away from the sides of the pot, your plant needs a deep soak.
No Blooms
If your canna is growing plenty of leaves but no flowers, it almost certainly needs more light. Move it to a sunnier window or add a grow light. High-nitrogen fertilizers can also cause the plant to focus on leaves rather than flowers. Switching to a fertilizer with a higher middle number (phosphorus) can help encourage blooming.
Pests
Indoor plants can sometimes attract spider mites or aphids, especially in dry winter air. If you see tiny webs or small insects on the undersides of the leaves, treat the plant with insecticidal soap or neem oil. Increasing the humidity around the plant can also help prevent these pests from moving in.
Transitioning Your Canna Outdoors and Back
Many gardeners choose to move their indoor cannas outside for the summer. This is a great way to give the plant a boost of intense natural sunlight and fresh air. However, you must do this gradually to avoid "shocking" the plant.
The Hardening Off Process
When the nights are consistently above 60°F, you can start the transition. Place your pot in a shaded, protected spot for a few hours each day. Gradually increase the amount of sunlight and time spent outside over the course of 10 to 14 days. This process, called "hardening off," allows the leaves to toughen up so they don't get sunburned.
Bringing it Back Inside
In the fall, bring your canna back inside before the first frost. Check the leaves and soil carefully for any "hitchhiking" bugs. It is often a good idea to give the plant a gentle spray with the hose and a light treatment with insecticidal soap before it enters your house. If you're planning the move by zone, Hardiness Zone Map and shipping information can help you time things correctly.
Summary of Success Rules for Indoor Cannas
- Right Plant: Choose dwarf or compact varieties for better indoor fit.
- Right Place: Place in the brightest south-facing window or use a grow light.
- Depth and Spacing: Plant rhizomes 4 inches deep in a 15-inch pot.
- Water Correctly: Keep the soil consistently moist but not waterlogged.
- Feed Regularly: Use a balanced fertilizer to support heavy growth.
- Prune for Growth: Cut spent stems to the ground to make room for new shoots.
Conclusion
Growing canna lilies indoors is a wonderful way to bring a piece of the tropics into your home. These plants are surprisingly easy to care for as long as you provide them with enough light and water. Whether you are keeping a favorite variety alive through the winter or starting your spring garden early, the bold colors and lush foliage of a canna lily are sure to brighten your day.
At Longfield Gardens, we believe that gardening should be a rewarding and enjoyable experience for everyone. By following these simple steps, you can turn a sunny corner of your home into a tropical oasis. The effort is small, but the reward—a beautiful, blooming lily in the middle of your living room—is truly spectacular.
"The secret to indoor canna success is treating it like a swamp-dwelling tropical guest. Give it plenty of light, never let it go thirsty, and it will reward you with months of vibrant color."
We invite you to explore the different colors and patterns available to find the perfect match for your home's style. For a mixed planting option, browse the Canna Assorted Collection. Happy indoor gardening!
FAQ
Can I grow canna lilies indoors from seeds?
Yes, you can grow them from seeds, but it takes much longer than growing from a rhizome. Canna seeds have a very hard outer shell that must be "scarified" (nicked or sanded) and soaked in water for 24 hours before planting. Starting with a rhizome is usually the better option for home gardeners because it results in a much larger, blooming-size plant in a fraction of the time. If you want to get a head start, see Starting Canna Lily Bulbs Indoors.
How do I know if my indoor canna lily is dormant?
An indoor canna will only go dormant if it is exposed to cold temperatures or if the soil dries out completely for an extended period. If this happens, the leaves will turn brown and die back to the ground. If your plant goes dormant, you can simply stop watering it, store the pot in a cool place, and then begin watering and providing light again in the spring to wake it back up.
Are canna lilies safe for homes with pets?
According to the ASPCA, canna lilies (Canna edulis) are considered non-toxic to dogs, cats, and horses. This makes them a safer choice for indoor gardening than many other tropical plants, such as lilies (Lilium) or peace lilies, which can be very dangerous to pets. However, it is always a good idea to discourage your pets from chewing on any houseplants to avoid upset stomachs.
Why are the tips of my indoor canna leaves turning brown?
Brown, crispy tips are usually a sign of low humidity or inconsistent watering. If the air in your home is very dry, especially during the winter when the heater is running, the plant loses moisture faster than it can take it up. Try increasing the humidity with a pebble tray or a humidifier, and ensure you are watering the plant as soon as the top inch of soil feels dry.