Module 5
Indoor Plant Air Purification Guide
NASA-studied plants that clean indoor air, with child/pet safety ratings
How to Use This
How to Use This: Check the child/pet safety column first to narrow your options. Then match plant difficulty level to your experience. Start with 2-3 easy-care, non-toxic plants for the rooms where your family spends the most time.
Key Terms
Key terms: VOCs = Volatile Organic Compounds — invisible gases released by paint, furniture, cleaning products, and building materials that can irritate airways and affect health.
NASA's Clean Air Study found certain houseplants remove formaldehyde, benzene, and other VOCs. Aim for 1 plant per 100 sq ft for measurable effect.
| Plant | Removes | Difficulty | Safe for Kids/Pets? |
|---|---|---|---|
| Spider Plant | Formaldehyde, xylene, carbon monoxide | Easy — tolerates neglect | Yes — non-toxic |
| Boston Fern | Formaldehyde, xylene | Moderate — needs humidity | Yes — non-toxic |
| Bamboo Palm | Formaldehyde, benzene, trichloroethylene | Moderate — bright indirect light | Yes — non-toxic |
| Rubber Plant | Formaldehyde, carbon monoxide | Easy — low light tolerant | No — toxic sap if ingested |
| Peace Lily | Benzene, formaldehyde, ammonia, trichloroethylene | Easy — low light, droops when thirsty | No — mildly toxic (calcium oxalate) |
| Areca Palm | Formaldehyde, xylene, toluene | Moderate — bright indirect light | Yes — non-toxic |
| Snake Plant | Formaldehyde, benzene, nitrogen oxides | Very easy — nearly indestructible | Mildly toxic if ingested — keep out of reach |
| Pothos (Golden) | Formaldehyde, benzene, carbon monoxide | Very easy — any light condition | No — toxic if ingested. Hang high. |
| Chinese Evergreen | Formaldehyde, benzene | Easy — low light tolerant | No — toxic (calcium oxalate crystals) |
| Gerbera Daisy | Benzene, trichloroethylene, formaldehyde | Moderate — needs direct sun | Yes — non-toxic |
Important
Overwatered houseplants are a mold source. Use pots with drainage holes, avoid saucers with standing water, and let soil dry between waterings. If you see white fuzz on soil, scrape it off and reduce watering. Terra cotta pots are better than plastic for airflow.
For homes with toddlers, stick to the non-toxic options: Spider Plant, Boston Fern, Bamboo Palm, Areca Palm, and Gerbera Daisy. Place all plants on high shelves or in hanging planters out of reach regardless.
Next Steps
Next Steps: Plants complement but don't replace mechanical air filtration. Use the Air Purifier Comparison Chart if you need stronger filtration for allergies, mold, or chemical sensitivities.
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