Re: re-using potting soil from poisonous plants
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April 25, 2010 at 2:13 am
#29401
Anonymous
I would guess that there is no danger from the soil- but I don’t know for sure… I believe the toxic substance (ricin) is manufactured by the plant as an insecticide rather than an herbicide. The toxins produced to inhibit plant growth (allelopathy) are those that end up in the soil.