Pests
How to get rid of Italian arum—the garden’s most stubborn squatter—has finally met its match. 🌱 I've wrestled with it for years—until I discovered the boiling water barrier that actually works. This isn't just another "pull it out" solution; it attacks the roots where they hide, preventing regrowth for good.
You'll need basic tools: a shovel, gloves (the sap is toxic—don't touch it!), and a pot of boiling water. The process takes less than an hour, but the results last seasons. Most people give up after one failed attempt, but this method stops it permanently.
By the end, your garden will be free of those ugly, invasive leaves forever. The secret is creating a continuous barrier that starves the roots. No more fighting with it year after year—just clean soil and peace of mind.
Works best in spring or fall when the plant is actively growing but not yet dormant. Perfect for problem areas where nothing else has worked. Let's get rid of this menace for good!
📚 In This Guide
- What you need
- Instructions
- Tips and common mistakes
- Wrapping up and next steps
What you need
- ● Boiling water: At least 2–3 gallons (enough to saturate the roots and surrounding soil). Use freshly boiled water for maximum effectiveness.
- ● Heavy-duty gloves: Waterproof, chemical-resistant gloves (e.g., rubber or nitrile) to protect your hands from heat and sap.
- ● Long-handled shovel or garden fork: A 16–18-inch tool to loosen soil and dig around roots without burning your hands.
- ○ Garden hose or watering can: For pre-wetting the soil (optional but helpful for deeper penetration).
- ● Trash bags or heavy-duty plastic: 2–3 large bags (30+ gallon size) to collect debris and dispose of the plant safely.
- ○ Vinegar or salt (optional but recommended): White vinegar: 1 gallon (mixed with boiling water for extra kill power).
- ● Coarse salt: 1–2 cups (sprinkled over the roots post-treatment to inhibit regrowth).
- ● Rake or stiff brush: To clear debris and loosen soil before treatment.
- ● Garden sprayer: For applying vinegar or herbicide (if used) evenly.
- ● Plastic sheeting: 4x6 ft to cover the area post-treatment and block sunlight (smothers regrowth).
- ● Herbicide (glyphosate-based): If the arum is deeply rooted, a non-selective herbicide can be used after boiling water treatment for stubborn cases.
- ● Safety goggles: To protect your eyes from splashes or debris.
- ● Disposable coveralls: For heavy infestations (keeps your clothes clean!).
Step-by-Step instructions for eliminating Italian arum
This method works—no chemicals, no guesswork. Boiling water kills roots on contact.
🌱 Step 1: Identify and Clear the Area Around the Plant
Start by removing any visible foliage and stems at the base using heavy-duty gloves and pruning shears. Italian arum spreads aggressively, so dig down 6 inches deep around the plant to expose as much of the root system as possible. You’ll see thick, white rhizomes—these are your targets. The deeper you go, the better your results.
If the plant grows near sidewalks or driveways, scrape away mulch or soil to expose roots. This step is critical—skipping it means hidden roots will regrow. I like to use a flat shovel to gently lift the soil rather than digging too deeply, which can damage nearby plants or underground utilities.
💧 Step 2: Apply Boiling Water Directly to the Roots
Fill a large water kettle or pot with water and bring it to a full boil. Pour the boiling water directly onto the exposed roots, focusing on the thickest sections. You’ll need about 1-2 gallons per plant, depending on size. The water should be steaming aggressively—this heat kills the plant’s vascular system instantly.
Work in sections if the root system is large, reapplying boiling water as needed. Avoid pouring water on surrounding soil or plants, as the extreme heat can damage them. I like to use a small watering can with a long spout for precision, especially around edges where roots might hide.
☀️ Step 3: Create a Barrier to Prevent Regrowth
After treating the roots, create a physical barrier to block any remaining rhizomes from sprouting. Lay down a layer of landscape fabric or thick cardboard over the treated area, extending 12 inches beyond the plant’s original perimeter. Secure it with rocks or bricks to keep it in place.
This barrier prevents new shoots from pushing through. For extra protection, I add a 2-inch layer of coarse gravel on top of the fabric. The combination of heat treatment and physical blockage ensures the plant won’t return. Check the area monthly for any new growth—if you spot even a small shoot, repeat the boiling water treatment immediately.
✂️ Step 4: Monitor and Maintain the Treated Area
Over the next 4-6 weeks, watch for any signs of regrowth. Italian arum is persistent, so don’t be surprised if a few stubborn rhizomes survive the initial treatment. If you see new shoots, dig them out and apply boiling water again. Consistency is key—one treatment alone won’t guarantee permanent removal.
Once the area is clear, you can replant with non-invasive species. I recommend choosing ground covers like creeping thyme or clover, which won’t compete with Italian arum’s aggressive spread. Keep the area mulched lightly to discourage any remaining roots from surfacing.
Tips & tricks for eliminating Italian arum
Here's what nobody tells you about making this method work the first time—because Italian arum is sneaky.
Digging Deep Matters: In Step 1, those 6 inches of depth aren't arbitrary. Italian arum's rhizomes can extend deeper than you think. I've seen roots go down 8-10 inches in some cases. If you're dealing with a large patch, consider renting a soil knife for more precise digging without disturbing nearby plants. The key is exposing as much of those thick, white rhizomes as possible—any hidden pieces will regrow.
Boiling Water Precision: When applying the boiling water in Step 2, focus on the thickest sections of the rhizomes. I've found that using a small watering can with a long spout gives you better control than pouring directly from a kettle. The water should be steaming aggressively—this is what kills the plant's vascular system. For large patches, work in sections and reapply as needed. Pro tip: Have a garden hose nearby to cool surrounding soil immediately if any boiling water accidentally spills.
Barrier Placement is Critical: The 12-inch extension beyond the plant's perimeter in Step 3 might seem excessive, but trust me on this. Italian arum rhizomes can spread horizontally up to 2 feet from the main plant. I've seen new shoots appear 18 inches away from the original plant when the barrier wasn't extended far enough. Use landscape fabric rated for weed suppression—it's more durable than cardboard and lasts longer. For extra security, overlap pieces by at least 6 inches.
Monitoring Strategy: The 4-6 week monitoring period in Step 4 is non-negotiable. I've seen Italian arum resurface after 8 weeks when people got impatient. Set a calendar reminder to check monthly. If you spot any new shoots, don't wait—dig them out immediately and treat with boiling water again. The sooner you catch regrowth, the easier it is to eliminate completely. Consider marking treated areas with small flags or stakes to track progress.
Pro Tips for Get Rid Of Italian Arum
- Here's what nobody tells you about making this method work the first time—because Italian arum is sneaky.
- Digging Deep Matters: In Step 1, those 6 inches of depth aren't arbitrary.
- Boiling Water Precision: When applying the boiling water in Step 2, focus on the thickest sections of the rhizomes.
Frequently asked questions
Got lingering questions about tackling Italian arum? Here are answers to the most common concerns—so you can banish this invasive pest for good!
Is boiling water safe for other plants or soil?
The boiling water method is highly targeted—just pour it directly onto the Italian arum’s base. Avoid nearby plants by using a focused stream (like a small watering can with a spout). For soil, dilute the water (1:1 with cold water) if you’re worried about heat damage to roots. Always test a small area first!
How long until the Italian arum is completely gone?
You’ll see wilting within 24–48 hours, but roots may linger. Reapply boiling water to the same spot every 3–5 days for 2–3 weeks to ensure total eradication. For stubborn cases, dig up remaining roots (wear gloves!) and dispose of them in sealed bags.
What if the Italian arum keeps coming back?
Rebound growth usually means leftover roots or underground rhizomes. Dig deeper (6+ inches) around the area and check for fragments. If the problem persists, consider a vinegar solution (1:1 vinegar/water) or a pre-emergent herbicide for stubborn patches.
Are there non-toxic alternatives to boiling water?
Yes! Try these:
- Vinegar spray: Mix equal parts white vinegar and water, add dish soap, and spray directly on leaves/roots. Repeat weekly.
- Salt solution: Dissolve 1 cup salt in 1 gallon of water and pour around the base (avoid desirable plants).
- Manual removal: Dig out roots (wear gloves!) and smother the area with cardboard + mulch to block regrowth.
Is Italian arum poisonous to pets or kids?
Yes! All parts of Italian arum (Arum italicum) contain calcium oxalate crystals, which can cause mouth irritation, drooling, or vomiting if ingested. Keep pets/kids away during treatment. After eradication, monitor the area until new growth is confirmed gone.
Wrapping up and next steps
Getting rid of Italian arum (also known as Arum italicum) is tough, but with persistence and the right methods—like the boiling water barrier—you can permanently choke out its invasive roots.
Remember, patience is key, and consistent follow-up ensures no regrowth. Once you’ve tackled the bulk, keep an eye on the area for a few months to confirm success!
You’ve got this! 🌱 Now that you’re armed with the knowledge, grab your supplies and take action—your garden (and future self) will thank you. Ready to reclaim your space? Start today!