Why Does My Artificial Tree Smell Like Plastic Even After Airing Out For Weeks

Even after weeks of effort, some artificial Christmas trees continue to emit a stubborn plastic-like odor. This is more common than many realize, especially with newer or budget-friendly models. The smell can permeate an entire room, undermining holiday cheer and raising concerns about indoor air quality. While airing out the tree is a logical first step, it often isn’t enough—especially when volatile organic compounds (VOCs) are deeply embedded in the materials. Understanding the root causes, health implications, and effective mitigation strategies is essential for restoring freshness and peace of mind.

The Science Behind the Plastic Smell

Artificial trees are primarily made from polyvinyl chloride (PVC), polyethylene (PE), or a blend of plastics designed to mimic the texture and appearance of real pine needles. During manufacturing, these materials are heated, molded, and treated with flame retardants, stabilizers, and softening agents. When new, they release VOCs—a process known as off-gassing. These gases include chemicals like benzene, toluene, and phthalates, which contribute to the characteristic “new plastic” smell.

Off-gassing doesn’t stop at the factory. It continues after purchase, particularly in warm environments or enclosed storage spaces. Even after weeks of airing out, residual VOCs trapped in crevices, folds, and dense foliage may slowly leach into the air. The rate of emission decreases over time but can persist for months, especially if the tree was stored in plastic during shipping or in a hot attic.

“New plastic products, including holiday decor, can emit low levels of VOCs for weeks or even months. While typically not hazardous in small amounts, prolonged exposure in poorly ventilated areas should be minimized.” — Dr. Lena Park, Indoor Air Quality Specialist, Environmental Health Review

Why Airing Out Isn't Always Enough

Many consumers assume that leaving an artificial tree outside or in a garage for a few days will eliminate the odor. However, this method has limitations:

• Surface-level ventilation: Only the outer layers of the tree are exposed to fresh air, while inner branches remain sealed and continue to trap gases.
• Temperature dependence: Off-gassing increases with heat. Cool outdoor temperatures slow the release of VOCs, making the process inefficient.
• Humidity issues: Damp conditions promote mold growth on metal stands or fabric skirts, introducing musty odors that mix with the plastic smell.
• Prolonged storage in plastic: Trees wrapped tightly in plastic bags before use reabsorb emitted gases, effectively “recharging” the odor.

In one documented case, a family in Ohio aired their pre-lit artificial tree in an unheated garage for three weeks before bringing it indoors. Despite this, the smell returned within hours of setup. Testing revealed elevated levels of phthalates near the base of the tree, where wiring and PVC branches were most concentrated. Only targeted cleaning and activated charcoal treatment reduced the odor to acceptable levels.

Mini Case Study: The Persistent Pre-Lit Tree

Sarah M., a homeowner in Portland, bought a 7.5-foot pre-lit artificial tree online. She followed standard advice: unpacked it in her sunroom for ten days, ran fans around it, and even used a vinegar spray. Still, when she decorated it, guests complained of headaches and a sharp chemical scent. After consulting an environmental hygienist, she learned that the LED wiring insulation and PVC coating on the branch tips were the main culprits. By dismantling the tree section by section, wiping each branch with a baking soda solution, and storing segments with odor-absorbing packs for two weeks, she reduced the smell by over 90%. Her experience highlights the importance of active decontamination over passive airing.

Effective Methods to Eliminate the Plastic Odor

Eliminating persistent plastic smells requires a multi-pronged approach. Below is a step-by-step guide combining proven techniques:

Step-by-Step Deodorizing Timeline

1. Disassemble completely: Take the tree apart into individual sections. This exposes hidden surfaces and allows thorough treatment.
2. Dry wipe all branches: Use microfiber cloths dampened with a mixture of water and 1 tablespoon of baking soda per cup. Avoid soaking—plastic shouldn’t be left wet.
3. Air in a warm, ventilated space: Set up fans in a dry garage or shed. Ideal temperature: 65–75°F (18–24°C). Run fans 24/7 for 3–5 days to accelerate off-gassing.
4. Use odor absorbers: Place each tree section in large trash bags with activated charcoal pouches or boxes of baking soda. Seal loosely and leave for 7–10 days.
5. Vacuum lightly: Use a brush attachment to remove dust and residual particles before final storage or assembly.
6. Test indoors cautiously: Reassemble in a well-ventilated room. Monitor for 24 hours before decorating.

Tip: Never use bleach, ammonia, or strong solvents on artificial trees—they can degrade plastic and increase VOC emissions.

Do’s and Don’ts of Artificial Tree Odor Control

Action	Recommended?	Reason
Wipe branches with baking soda solution	✅ Yes	Neutralizes acidic VOCs without damaging plastic
Store in breathable cotton bag	✅ Yes	Prevents gas reabsorption and allows airflow
Use essential oil sprays directly	❌ No	Oils can react with plastic, causing stickiness or degradation
Leave assembled in closed room with air purifier	⚠️ Limited	HEPA filters don’t capture gases; only effective with carbon filter
Expose to direct sunlight	⚠️ Use caution	UV can break down VOCs but may fade color and weaken plastic over time
Freeze the tree sections overnight	❌ No	Condensation can lead to moisture damage and mold

Long-Term Prevention and Storage Tips

Once the odor is under control, proper storage prevents recurrence. Many people unknowingly reintroduce smells by packing away a dusty or improperly dried tree.

Checklist: Year-Round Tree Care Routine

• After holiday season: Disassemble and inspect each section for dust or debris.
• Wipe down branches with dry microfiber cloth before storage.
• Use acid-free tissue paper around delicate tips to prevent breakage.
• Store in a labeled, ventilated container—not sealed plastic.
• Include silica gel packets or activated charcoal in storage bins.
• Keep container in a cool, dry place—avoid attics, garages, or basements with humidity swings.
• Rotate storage position annually to prevent flat spots and material stress.

Consider upgrading to newer PE (polyethylene) trees if odor sensitivity is a recurring issue. Unlike traditional PVC, PE is molded from life-cast trees and uses fewer plasticizers, resulting in lower VOC emissions and a more realistic feel. While more expensive upfront, they tend to have less odor and last longer with care.

Frequently Asked Questions

Is the plastic smell from artificial trees dangerous?

For most healthy adults, short-term exposure to the plastic odor is not harmful. However, individuals with asthma, chemical sensitivities, or compromised immune systems may experience headaches, dizziness, or respiratory irritation. Long-term exposure in poorly ventilated spaces is discouraged. If symptoms persist, consider switching to low-VOC or non-plastic alternatives like wooden or fabric trees.

Can I use an air purifier to remove the smell?

Only if the air purifier includes a substantial activated carbon filter. Standard HEPA filters capture particles but not gases. Look for units with at least 1–2 pounds of carbon for effective VOC reduction. Run continuously in the room where the tree is displayed, ideally before and during use.

Will the smell go away on its own over time?

Yes, but slowly. Most artificial trees lose noticeable odor within 1–3 years with regular use and proper storage. However, skipping proactive deodorizing steps can prolong the process significantly. Active treatment cuts this timeline by months.

Conclusion: Breathe Easy This Holiday Season

An artificial tree shouldn’t come at the cost of comfort or air quality. The persistent plastic smell is a common but solvable issue rooted in material science and storage habits. By understanding off-gassing, moving beyond passive airing, and applying targeted cleaning and absorption methods, you can enjoy a festive, odor-free centerpiece. Proper storage ensures the problem doesn’t return year after year. With a little effort now, your tree can become a lasting tradition—without the chemical aftertaste.

💬 Have a tip that worked for your smelly tree? Share your experience in the comments—your solution might help another family enjoy a fresher holiday season.