Ask A Scientist© Botany Archive

name       Leonardo
status     other
age        30s

Question - Is it safe for human beings to sleep with plants in the bedroom?
I think that you're asking about oxygen levels at night. Although plants 
do respire (need oxygen) at night, the amount is tiny compared to the 
availability of oxygen in the home.

However, a greater concern would be for allergy and asthma sufferers, in 
that the soil surrounding some houseplants may have molds and mildews, and 
dust accumulating on leaves which may cause problems.
for example,
http://ci.fargo.nd.us/health/environ/airqual.htm

Anthony R. Brach, Ph.D.
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