Growing Fresh Air with 8 Powerful Plants

Janelle Sorensen Wednesday, December 23, 2009 What do you do when you become allergic to the air?  When your lungs begin to shut down because the air is too contaminated?  Kamal Meattle suffered from this fate and guess what his solution was? Grow new air. Based on years of NASA studies, other scientific research, and 15 years of his own testing, Meattle discovered that three common houseplants, used strategically throughout a home, could vastly improve the indoor air quality.

Here's the breakdown:

Areca Palm is "The Living Room Plant" - This plant is a daytime oxygen factory and Meattle recommends having 4 shoulder height plants per person.

Mother-in-Law's Tongue is "The Bedroom Plant" - This plant is an evening oxygen factory and Meattle recommends having 6-8 waist-high plants per person.

Money Plant is "The Specialist Plant" - This plant is the filter that removes formaldehyde and other volatile organic chemicals from the air.

If maintained appropriately, Meattle claims you could live inside a bottle with a cap on top and these three plants would generate all the fresh air you need.

Not looking to live in a bottle? These plants will certainly still improve your indoor air quality (even if you don't have quite so many). And, if you're not satisfied with just three options, other new research has identified five "super ornamentals" that demonstrated high effectiveness of contaminant removal.

These include the purple waffle plant (Hemigraphis alternataa), English ivy (Hedera Helix), variegated wax plant (Hoya cornosa), Asparagus fern (Asparagus densiflorus) and the Purple heart plant (Tradescantia pallida).

Of the 28 plants tested, these five were effective at reducing levels of a number of common household VOCs, including benzene, toluene, octane, alpha-pinene and TCE. The work, funded by the University of Georgia's Agricultural Experiment Stations, was published in the August 2009 issue of HortScience.

Ready to grow your own fresh air? NASA studies recommend that you use one good-sized houseplant in a 6 to 8-inch diameter container for every 100 square feet of your home. Though, additional research is being done to identify exactly how many of each type of species is necessary for remediation (as in Meattle's work). You should also be sure to keep the foliage clean and dust free (so the leaves can do their job). And, keep the top of soil clean and free of debris, as in some cases, that's where the bulk of the filtering is taking place.

The healthier your plants, the more vigorously they'll grow, and the better they'll clean the air for you.
Read more: http://healthychild.org/blog/comments/growing_fresh_air_with_8_powerful_plants/#ixzz0of3wAmuM


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By Greg Seaman Posted May 13, 2009 Common indoor plants may provide a valuable weapon in the fight against rising levels of indoor air pollution. NASA scientists are finding them to be surprisingly useful in absorbing potentially harmful gases and cleaning the air inside homes, indoor public spaces and office buildings.

The indoor pollutants that affect health are formaldehyde, Volatile Organic Compounds (benzene and trichloroethylene or TCE), airborne biological pollutants, carbon monoxide and nitrogen oxides, pesticides and disinfectants (phenols), and radon. These pollutants contribute to ’sick building syndrome’, which causes symptoms ranging from allergies, headaches and fatigue through to nervous-system disorders, cancer and death.

Through studies conducted by NASA, scientists have identified 50 houseplants that remove many of the pollutants and gases mentioned above. Dr. B. C. Wolverton rated these plants for removing chemical vapors, ease of growth, resistance to insect problems, and transpiration (the amount of water they expire into the air).

NASA, with assistance from the Associated Landscape Contractors of America, conducted a two-year study directed by Dr. B.C. Wolverton, an environmental engineer from Picayune, Miss. Wolverton has worked as a research scientist for NASA for some 20 years. His study, in the late ’80s and early ’90s, of the interaction of plants and air found that houseplants, when placed in sealed chambers in the presence of specific chemicals, removed those chemicals from the chambers.

Dr. B.C. Wolverton, researcher and author of “How to Grow Fresh Air — 50 Houseplants that Purify Your Home or Office” (1997, Penguin paperback, $15.95), conducted plant studies for NASA that determined that plants can clean pollutants in homes, offices, factories and retail outlets.

Later, Wolverton expanded the study and assigned plants a rating from one to 10, based on a plant’s ability to remove chemical vapors or indoor air toxins, ease of growth and maintenance, resistance to insect infestation and the rate at which water evaporates from the leaves.


Top ten plants for removing formaldehyde, benzene, and carbon monoxide from the air:

1. Areca Palm (Chrysalidocarpus lutescens) Also called the “Butterfly Palm”. An upright houseplant that is somewhat vase shaped. Specimen plants can reach 10 to 12 foot in height. Prefers a humid area to avoid tip damage. Requires pruning. When selecting an Areca palm look for plants with larger caliber trunks at the base of the plant. Plants that have pencil thin stems tend to topple over and are quite difficult to maintain.



2. Lady Palm (Rhapis excelsa) Also called the “Lady Palm”, this durable palm species adapts well to most interiors. The Rhapis are some of the easiest palms to grow, but each species has its own particular environment and culture requirements. The “Lady Palm” grows slowly, but can grow to more than 14′ in height with broad clumps often having a diameter as wide as their height.



3. Bamboo palm (Chamaedorea seifrizii) Also called the “reed palm”, this palm prefers bright indirect light. New plants will lose of some interior foliage as they acclimate to indoor settings. This plant likes to stay uniformly moist, but does not like to be over-watered or to sit in standing water. Indoor palms may attract spider mites which can be controlled by spraying with a soapy solution.



4. Rubber Plant (Ficus robusta) Grows very well indoors, preferring semi-sun lighting. Avoid direct sunlight, especially in summer. Young plants may need to be supported by a stake. The Ficus grows to 8’ with a spread of 5’. Wear gloves when pruning, as the milky sap may irritate the skin. Water thoroughly when in active growth, then allow the soil to become fairly dry before watering again. In winter keep slightly moist.



5. Dracaena “Janet Craig” (Dracaena deremensis) The Dracaena grows to 10’ with a spread of 3’. Easy to grow, these plants do best in bright indirect sunlight coming from the east/west. They can adapt to lower light levels if the watering is reduced. Keep the soil evenly moist and mist frequently with warm water. Remove any dead leaves. Leaf tips will go brown if the plant is under watered but this browning may be trimmed.



6. Philodendron (Philodendron sp.) One of the most durable of all house plants. Philodendrons prefer medium intensity light but will tolerate low light. Direct sun will burn the leaves and stunt plant growth. This plant is available in climbing and non-climbing varieties. When grown indoors, they need to be misted regularly and the leaves kept free of dust. Soil should be evenly moist, but allowed to dry between watering.



7. Dwarf Date Palm (Phoenix roebelenii) A hardy, drought-tolerant and long-lived plant, the Dwarf Date Palm needs a bright spot which is free of drafts. It grows slowly, reaching heights of 8-10’. The Dwarf Date Palm should not be placed near children’s play areas because it has sharp needle-like spines arranged near the base of the leaf stem. These can easily penetrate skin and even protective clothing.



8. Ficus Alii (Ficus macleilandii “Alii”) The Ficus Alii grows easily indoors, and resists insects. It prefers a humid environment and low to medium light when grown indoors. The Ficus Aliii should not be placed near heating or air conditioning vents, or near drafts because this could cause leaf loss. Soil should be kept moist but allowed to dry between watering.



9. Boston Fern (Nephrolepis exaltata “Bostoniensis”) The Boston fern grows to 4’ in height with a spread up to 5’. It has feathery ferns which are best displayed as a hanging plant. It prefers bright indirect sunlight. Keep the soil barely moist and mist frequently with warm water. This plant is prone to spider mites and whitefly which can be controlled using a soapy water spray. Inspect new plants for bugs before bringing them home.



10. Peace Lily (Spathiphyllum “Mauna Loa”) The Peace Lily is a compact plant which grows to a height of 3’ with a 2’ spread. This hardy plant tolerates neglect. It prefers indirect sunlight and high humidity, but needs to be placed out of drafts. For best results, the Peace Lily should be thoroughly watered, then allowed to go moderately dry between waterings. The leaves should be misted frequently with warm water.