VERMICULITE GARDEN PRODUCTS
Is there asbestos in the vermiculite sold for gardening uses?
Not all vermiculite garden products contain asbestos, but an EPA study showed that some contain low levels of asbestos. Asbestos was found primarily in the unmixed vermiculite product sold separately as a soil amendment.
However, some was found in premixed potting soil. Because the Libby mine closed in 1990, newer products are not expected to contain significant amounts of asbestos.
It is possible, however, that some older products could still be on store shelves.
Courtesy of The ATSDR
Some precautions for vermiculite garden potting soil with asbestos