Seven indoor plants for the experiment were selected and tested separately in one cubic meter of sealed glass chamber in the daytime for 425 minutes. All plants used were healthy and kept in a room temperature of 25 C (77 F) ± 1 C (33.8 F), relative humidity stayed at 78% to 85%.
The plants were 9 months old, grown in regular potting mixes consisting of composted hardwood, sawdust, composted bark fines, and coarse river sand (with ratio 2:2:1), in 10 inches diameter plastic pots. Plants were fertilized every 2 weeks with organic fertilizers.
The following study confirms that dumb cane is the most CO2 absorbing houseplant. It’s also clear from this experiment and other previous ones that houseplants can be the best natural and cost-effective alternative to reduce the CO2, indoor air pollutants and volatile organic compounds from the air.
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