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NASA research confirmed what plant lovers suspected: common houseplants absorb indoor toxins like formaldehyde, benzene, and VOCs through their leaves and root systems. They won't replace a good HVAC filter, but they're a simple, beautiful layer of protection that works around the clock.
Here are the 10 best: ranked, compared, and matched to every room in your home.
Snake Plant (Sansevieria trifasciata)
One of the most effective air purifiers on the list. Removes formaldehyde, benzene, and nitrogen oxides — and releases oxygen at night, making it ideal for bedrooms. Nearly impossible to kill.
Spider Plant (Chlorophytum comosum)
Removes formaldehyde and carbon monoxide. One of the few plants that is completely safe for pets and children — making it the go-to choice for nurseries and family spaces.
Peace Lily (Spathiphyllum)
NASA's top pick. Removes ammonia, benzene, and formaldehyde — and it tells you when it needs water by drooping slightly. Thrives in low light and looks great doing it.
English Ivy (Hedera helix)
The best mold fighter on this list — shown to eliminate up to 78% of airborne mold in just 12 hours. Ideal for bathrooms and basements where moisture builds up.
Aloe Vera (Aloe barbadensis)
Absorbs VOCs from cleaning products and paints. Doubles as a first-aid plant for minor burns. Thrives in sunny spots and needs almost no watering.
Boston Fern (Nephrolepis exaltata)
A natural humidifier that actively tackles VOCs and thrives in moisture-rich environments. Safe for pets and children — one of the best picks for bathrooms and nurseries.
Rubber Plant (Ficus elastica)
Large leaves mean more surface area for absorbing airborne toxins, including formaldehyde. Handles high-traffic rooms well and tolerates low light and some neglect.
Plants absorb gases through tiny pores in their leaves called stomata. Soil microbes around the roots then break those compounds down into harmless byproducts. It's slow and continuous, not a quick fix, but a steady one.
The honest truth: You'd need hundreds of plants to match a HEPA purifier. But 2–3 well-placed plants per room still provide a meaningful, passive boost, especially for gases that filters don't catch.
In sealed test chambers, these plants removed significant portions of common indoor toxins within 24 hours:
Snake Plant & Spider Plant — top performers for overall VOC reduction
Peace Lily — best at absorbing ammonia and benzene
English Ivy — reduced airborne mold spores by 78% in 12 hours
Important caveat: Lab conditions differ from real homes. Real-world effects are gentler, which is why pairing plants with good filtration matters.
Note: All pollutant‑removal data are drawn from NASA’s Clean‑Air Study and follow‑up peer‑review research. Pet‑safety information comes from the ASPCA Toxic & Non‑Toxic Plant database.
Looking for low-maintenance indoor plants for clean air? Start with a spider plant or snake plant. They’re hardy, forgiving, and proven performers.
FROM OUR AIR QUALITY LAB
"After testing many air filtration scenarios, we've found that customers who use both plants AND high-MERV filters report noticeably fresher-smelling air. Plants handle gases that filters can't, while filters capture particles plants miss. It's the perfect partnership." — FilterBuy Air Quality Team
Snake Plant, Aloe Vera, Spider Plant
These release oxygen at night — ideal for sleeping spaces. Snake plant is especially forgiving if you forget to water it.
Boston Fern, English Ivy, Peace Lily
Thrive in humidity and actively combat mold spores and VOCs from cleaning products.
Rubber Plant, Areca Palm, Pothos
Handle high-traffic pollutants, look great, and tolerate some neglect.
Spider Plant, Areca Palm, Boston Fern
All three are non-toxic to children and pets — the only ones safe for this room.
Most of the highest-performing plants on this list are toxic if ingested — including peace lily, pothos, English ivy, and rubber plant. Before buying:
Check the ASPCA Toxic Plant Database for pet safety
For homes with toddlers, prioritize Spider Plant, Areca Palm, and Boston Fern
Inspect new plants for pests (check soil and leaf undersides) before bringing inside
The Simple Formula
Plants tackle gases. Filters tackle particles. Use both and you've covered most of what's floating around in your home's air.
Step 1
MERV 8 + Carbon Filter in Your HVAC
Removes dust, pollen, pet dander, mold spores, and household odors at the source.
Step 2
2–3 Plants Per Main Room
Passively absorbs VOCs and gases 24/7 — no electricity, no maintenance beyond watering.
Step 3
Low-VOC Products
Reduces what needs to be cleaned in the first place — the easiest win of the three.
Spider Plant
Removes formaldehyde and carbon monoxide. Safe for pets and kids — one of the few that checks both boxes.
Best For
Nurseries, bedrooms, any pet-friendly space
Snake Plant
Removes formaldehyde and benzene. Releases oxygen at night and thrives in low light — nearly impossible to kill.
Best For
Bedrooms, offices, low-light rooms
Peace Lily
NASA's top pick for removing ammonia and benzene. Tolerates low light and signals when it needs water by drooping slightly.
Best For
Living rooms, bathrooms — keep away from pets
Aloe Vera
Absorbs VOCs from cleaning products and paints. Doubles as a handy first-aid plant for minor burns — bonus points for utility.
Best For
Kitchens, sunny windowsills
English Ivy
Shown to eliminate up to 78% of airborne mold in 12 hours — the strongest mold fighter on this list by a wide margin.
Best For
Bathrooms, basements — keep away from pets
Boston Fern
A natural humidifier that thrives in moisture and actively tackles VOCs from cleaning products. Loves a steamy bathroom.
Best For
Bathrooms, nurseries, humid spaces
Pet & child safety: Peace Lily, English Ivy, and Pothos are toxic if ingested. Always verify safety before placing any plant in a nursery or pet-accessible room. The ASPCA's plant database is the most reliable reference.
Source: NASA Clean Air Study (1989) + Filterbuy Air Quality Research
NASA’s Clean-Air Study found that Spider Plants, Snake Plants, Peace Lilies, and Aloe Vera are among the top air purifiers. Each one removes different indoor pollutants and contributes to better air quality in your home.
Philodendrons, Aglaonema, Aloe Vera, Dracaena, Spider Plants, and Peace Lilies are all effective plants that clean the air. They remove pollutants like formaldehyde, benzene, and VOCs from cleaning products.
English Ivy has been shown to eliminate up to 78% of airborne mold in 12 hours, making it ideal for allergy-prone areas like bathrooms or basements.
NASA recommends one to two medium plants per 100 square feet for meaningful VOC reduction. Larger rooms will require more greenery for noticeable results.
Orchids, Spider Plants, Peace Lilies, Chrysanthemums, and Snake Plants release small amounts of oxygen after dark—making them great choices for bedrooms.
The Snake Plant is one of the most effective air purifiers. It removes toxins like formaldehyde and nitrogen oxides and is low-maintenance—perfect for beginners.
Yes. Air filtering plants absorb gases through their leaves and improve indoor air quality over time. However, they work best alongside mechanical filtration like MERV 13 filters or HEPA purifiers.
Snake Plants, Spider Plants, and Peace Lilies are considered some of the best indoor plants for natural air purification. They target common indoor toxins and thrive in low- to medium-light conditions.
Absolutely. Many of the best indoor plants for health—like snake plant, aloe vera, and peace lily—release oxygen at night and can help promote restful sleep.
Both serve different roles. Plants slowly absorb gases and provide health benefits. Air purifiers quickly remove dust, mold spores, and allergens. For best results, use them together.
Unlike purifiers that work in minutes, air purifying plants improve air quality gradually over hours or days. Keeping leaves clean boosts their effectiveness.
Watering depends on the species. Snake Plants and Spider Plants are drought-tolerant and prefer dry soil. Ferns and Peace Lilies need more frequent watering.
NASA highlighted the Peace Lily for its strong performance in removing benzene and ammonia while tolerating low-light conditions.
Slightly. Plants absorb CO₂ during photosynthesis, but for significant reduction, proper ventilation is still more effective.
Many air-cleaning plants offer stress relief, boost humidity, and improve oxygen levels, making them some of the best indoor plants for health.
No. Many high-performing varieties like Peace Lily, Pothos, and English Ivy are toxic if ingested. Always check pet safety using the ASPCA’s plant database.
This article is:
✓ Backed by NASA Research
✓ Verified by Filterbuy Air Quality Experts
✓ Updated April 2026
✓ Reviewed by Certified HVAC Professionals
