Indoor plants do more than brighten up a room—they can also clean the air you breathe. Some houseplants naturally filter out toxins like formaldehyde, benzene, and carbon monoxide. But surprisingly, not all green companions are beneficial. Some may release allergens, emit VOCs (volatile organic compounds), or harbor mold, especially in poorly ventilated spaces.
In this article, discover 10 houseplants that act as natural air purifiers—and 10 that might do more harm than good if not properly cared for.
10 Houseplants That Purify Air Silently
These houseplants are known for their air-cleaning abilities, quietly removing pollutants and improving indoor air quality without any fuss.
1. Spider Plant (Chlorophytum comosum)
- Air Benefit: Removes carbon monoxide, formaldehyde, and xylene
- Why It’s Great: Hardy and easy for beginners
2. Snake Plant (Sansevieria trifasciata)
- Air Benefit: Filters benzene, formaldehyde, and nitrogen oxide
- Bonus: Releases oxygen at night—perfect for bedrooms
3. Peace Lily (Spathiphyllum)
- Air Benefit: Removes ammonia, benzene, and mold spores
- Note: Toxic to pets if ingested
4. English Ivy (Hedera helix)
- Air Benefit: Reduces airborne mold and fecal particles
- Ideal For: Bathrooms and damp spaces
5. Boston Fern (Nephrolepis exaltata)
- Air Benefit: Excellent at removing formaldehyde and adding humidity
- Best In: Bright, humid rooms
6. Aloe Vera
- Air Benefit: Clears formaldehyde and benzene from air
- Bonus: Doubles as a skin-soothing gel source
7. Areca Palm (Dypsis lutescens)
- Air Benefit: Natural humidifier; filters out toxins like toluene and xylene
- Best For: Open spaces with indirect sunlight
8. Rubber Plant (Ficus elastica)
- Air Benefit: Removes airborne chemicals and reduces mold spores
- Also Known For: Absorbing CO2 and converting it efficiently to oxygen
9. Bamboo Palm (Chamaedorea seifrizii)
- Air Benefit: Targets benzene and trichloroethylene
- Extra Benefit: Adds moisture to dry air
10. Gerbera Daisy (Gerbera jamesonii)
- Air Benefit: Removes trichloroethylene and benzene
- Bonus: Blooms brighten up any room
10 Houseplants That Can Pollute Indoor Air
Despite their beauty, these plants may worsen air quality under certain conditions—especially in poorly ventilated areas or for sensitive individuals.
1. Pothos (Epipremnum aureum)
- Concern: Can emit VOCs and may trigger skin irritation
- Caution: Keep away from pets and small children
2. Ficus Tree (Ficus benjamina)
- Concern: Releases latex allergens and drops sap and leaves, which can harbor mold
3. Dracaena
- Concern: May release VOCs from its leaves; also toxic to pets
- Sensitivity Alert: Can cause irritation in sensitive individuals
4. Yucca Plant
- Concern: Can collect mold in soil and trigger respiratory issues if overwatered
5. Peace Lily (Spathiphyllum)
- Yes, again: While purifying, it can emit pollen and mold in damp conditions
6. Dieffenbachia (Dumb Cane)
- Concern: Can emit irritating compounds and is highly toxic if ingested
7. Caladium
- Concern: Emits calcium oxalate crystals, a potential irritant
- Also: Leaves are highly toxic to pets and humans
8. Kalanchoe
- Concern: Mold-prone soil and toxic sap; may aggravate asthma
9. Asparagus Fern
- Concern: Can cause skin rashes and respiratory irritation from its spores
10. Orchids (Certain Varieties)
- Concern: Fungal issues and mold in overwatered soil; not toxic but may worsen indoor air if not well ventilated
Key Takeaways
- Air-purifying plants can reduce toxins, improve humidity, and even help you sleep better.
- Problematic plants may release VOCs, harbor mold, or produce allergens—especially in enclosed or humid spaces.
- Balance is key: Good ventilation, proper watering, and plant placement are essential for reaping the health benefits of any indoor plant.
