Pests
How to get rid of canna lilies—these aggressive spreaders can take over your garden in just one season. 🌱 I've wrestled with these tropical-looking plants for years, and I finally found the foolproof method to remove them completely—without harming the rest of your garden. The key is patience and persistence. You'll need a sharp spade, heavy-duty gloves, and a trash bag for disposal. Start by cutting back the foliage to make digging easier, then attack the thick rhizomes hidden underground. These underground stems are the real challenge—they can regrow from even small pieces left behind. Once you've dug up every last rhizome, you'll see your garden space transform. No more fighting with canna lilies pushing out your other plants. The satisfaction of reclaiming your garden is worth the effort, and you'll finally have control over what grows where. For extra insurance, consider laying down landscape fabric or mulch in the area afterward. This prevents any missed rhizomes from sprouting again. With this method, you'll have a clean slate in just a few hours of work.
📚 In This Guide
- What you need
- Instructions
- Tips and common mistakes
- Wrapping up and next steps
What you need
- ● Garden gloves (2 pairs) – Heavy-duty, waterproof gloves (e.g., Wet Palms or Gloves USA) to protect your hands from thorns and dirt.
- ● Shovel or digging fork (1) – A flat-bladed shovel (16–18 inches) or a digging fork for prying out roots without damaging nearby plants.
- ● Pruning shears or loppers (1 pair) – For trimming thick stems and foliage (e.g., Fiskars or Felco pruners).
- ● Garden pruners (1 pair) – For cutting smaller stems and roots.
- ● Wheelbarrow or large bucket (1) – To collect debris (5+ gallon capacity recommended).
- ● Garden tarp or heavy-duty plastic sheeting (1–2) – 4x6 ft or larger, to contain roots and soil during removal.
- ● Compost bin or trash bags (5–10) – For disposing of canna lilies (check local regulations—some areas treat them as invasive).
- ● Hose with nozzle – For rinsing tools and washing off soil.
- ○ Labeling tags or markers – To tag removed plants if you’re repurposing them (optional but helpful).
- ● Root knife or dandelion digger – For precision removal of deep or stubborn roots.
- ● Vinegar (white, 5% acetic acid) or herbicide – If you choose to treat the soil post-removal (follow label instructions!).
- ● Knee pads or gardening stool – For comfort during long digging sessions.
- ● Sunscreen and hat – If working in direct sunlight for extended periods.
- ● Camera or phone – To document the area before and after removal (helpful for tracking regrowth).
Step-by-Step instructions for humane canna lily removal
Here's the foolproof method I use to eliminate canna lilies without harming the ecosystem.
🌱 Step 1: Time Your Digging for Maximum Effectiveness
Canna lilies spread aggressively through thick, woody rhizomes that store energy for years. The best time to dig them up is in early spring or late fall when the plant is dormant. You'll know it's ready when the foliage has browned and died back naturally. Digging in summer misses the roots, and winter digging risks leaving fragments that regrow.
I wear thick gloves and a long-sleeved shirt—canna rhizomes can be sharp and may irritate skin. Mark the area with stakes if you're unsure where the plants end. These lilies spread underground in all directions, often beyond where the leaves appear.
✂️ Step 2: Cut Back Foliage and Loosen the Soil
Use pruning shears to cut back all the dead foliage to about 2 inches above ground level. This makes the digging process cleaner and helps you spot where the rhizomes are concentrated. Next, loosen the soil around the plant with a garden fork or trowel—don't dig too deep yet, just break up the top 6 inches of soil.
Work the fork in a circular motion around the plant, about 12 inches out from the base. This helps sever smaller rhizome strands without breaking them into pieces. If you chop a rhizome into fragments, even tiny pieces can regrow into new plants. I like to use a fork because it's more effective than a shovel for this job.
🪴 Step 3: Dig Deep and Remove All Rhizomes
Now it's time to dig. Use a spade or digging fork to remove the plant and its roots. Aim for a depth of at least 12 inches—canna rhizomes can extend that deep. Pull gently but firmly, working the spade around the edges of the plant to loosen everything. You'll need to repeat this process in sections if the plant is large.
Once you've lifted the plant, inspect the roots carefully. Look for any remaining rhizome pieces—even small fragments can sprout new plants. I spread the roots out on a tarp to check for any overlooked pieces. If you find any, dig around those spots again to ensure complete removal.
💧 Step 4: Dispose of the Rhizomes Properly
Never compost canna lilies—they'll just regrow. Instead, place the entire plant, including all roots and rhizomes, in a sealed plastic bag. Double-bagging is even better to prevent any accidental regrowth. I like to add a little soil to the bag to weigh it down and make it less likely to blow away.
Take the bagged plant to the landfill or a green waste facility. If you're unsure about disposal options, check with your local waste management service for guidelines. The key here is to ensure none of the plant material ends up in your compost or garden waste.
☀️ Step 5: Monitor and Maintain the Area
After removal, keep an eye on the area for at least 2 growing seasons. Any new shoots that appear are likely regrowth from missed rhizome fragments. If you spot any, dig them up immediately—they're easier to remove when young and haven't established a large root system.
To prevent future spread, consider planting the area with non-invasive ground covers or mulch heavily with 3-4 inches of landscape fabric or cardboard topped with mulch. This makes it harder for any stray rhizomes to push through and regrow. I've found that a combination of vigilance and smart landscaping keeps canna lilies from coming back.
Tips & tricks for eradicating canna lilies completely
Here's what I've learned after battling these invasive plants for years—these tricks make all the difference between temporary setbacks and permanent victory.
Timing is Everything: The dormant season (early spring or late fall) is your best window because canna lilies store energy in their rhizomes year-round. I've found that digging in summer often leaves stubborn root fragments behind, while winter digging can freeze the soil and make removal harder. Watch for fully browned foliage—this is your signal that the plant is truly dormant and ready for removal.
Equipment Matters More Than You Think: A garden fork is your secret weapon in Step 2—it lets you work the soil without chopping rhizomes into pieces. I've tried shovels, but they're too aggressive and create fragments that regrow. For large patches, consider renting a digging bar to make the job easier on your back. Always wear heavy-duty gloves; those rhizomes have sharp edges that can cut through regular gardening gloves.
The Double-Check System: After you've dug up everything, lay the rhizomes out on a tarp in bright sunlight. I've caught overlooked pieces this way that were nearly invisible in the soil. Even small fragments (as small as a dime) can regrow, so take your time with this inspection. For extra security, soak the roots in a bucket of soapy water for 10 minutes before disposal—this helps reveal any hidden fragments.
Future-Proof Your Garden: The 3-4 inches of mulch in Step 5 isn't just decorative—it's your first line of defense against regrowth. I recommend using landscape fabric under the mulch for high-risk areas. For really stubborn spots, consider planting deep-rooted perennials like daylilies or coneflowers that will outcompete any stray rhizomes trying to push through.
Pro Tips for Get Rid Of Canna Lilies
- Here's what I've learned after battling these invasive plants for years—these tricks make all the difference between temporary setbacks and permanent victory.
- Timing is Everything: The dormant season (early spring or late fall) is your best window because canna lilies store energy in their rhizomes year-round.
- Equipment Matters More Than You Think: A garden fork is your secret weapon in Step 2—it lets you work the soil without chopping rhizomes into pieces.
Frequently asked questions
When is the best time to dig up canna lilies?
The ideal time to remove canna lilies is in early spring (before new growth appears) or late fall (after foliage dies back). This ensures you catch dormant tubers when they’re easier to extract. Avoid winter in freezing climates—soil may be too hard, and tubers could rot.
Will vinegar or herbicide kill canna lilies permanently?
Vinegar (30% acetic acid) can kill above-ground growth, but it won’t eradicate tubers. For complete removal, dig up tubers first. Herbicides like glyphosate may work, but they’re non-selective and can harm nearby plants. Always follow label instructions and test on a small area first.
What if I miss a tuber? Will canna lilies regrow?
Even a small fragment of a tuber can sprout into a new plant. Double-check the soil after digging—especially in shaded or moist areas where tubers hide. For stubborn regrowth, repeat the process in spring or treat with a pre-emergent herbicide (like corn gluten meal).
Are there natural alternatives to digging?
Yes! For non-invasive control, try:
- Solarization: Cover the area with clear plastic for 4–6 weeks in summer to bake tubers.
- Smothering: Use thick cardboard or mulch (6+ inches) for 6 months to starve tubers of light.
- Hand-pulling: Works for small patches, but tubers may fragment—wear gloves!
Combine methods for best results.
Can I use a tiller or shovel to remove canna lilies?
Yes! A tiller is great for loosening soil in large areas, but inspect the soil afterward—tubers can hide in clumps. For precision, use a shovel or garden fork to lift soil in sections. Wear protective gear (gloves, long sleeves) to avoid cuts from sharp rhizomes.
Wrapping up and next steps
Removing canna lilies doesn’t have to be a daunting task—with the right tools, patience, and a few extra precautions, you can completely eradicate them from your garden.
Whether you’re digging them out by hand, using vinegar for a natural solution, or opting for smothering techniques, consistency is key. Don’t let these invasive plants take over—your garden will thank you!
Now that you’re armed with the knowledge, roll up your sleeves and tackle the job. Start with the method that best fits your garden’s needs, and remember: a little effort now means fewer headaches later. Happy digging! 🌱✨