This article is from the Basic Health Care FAQ, posted to rec.pets.cats newsgroup. Maintained by Cindy Tittle Moore with numerous contributions by others.
Plants from commercial greenhouses may be sprayed with systemics to control pests. Some are fairly nasty and long-lasting. More enlightened greenhouses use integrated pest management techniques and vastly reduce the costs of pest control, and costs to the environment.
You'll need to ask about what the sprays are, how often, etc. They should have MSDS (material safety data sheets) on hand for everything they use. Many greenhouses also buy foliage plants (esp.) from commercial growers in southern states, rather than raising their own plants, so you need to ask about that too.
 
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