re-using potting soil from poisonous plants

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This topic contains 2 replies, has 3 voices, and was last updated by  margaret 3 years ago.

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April 24, 2010 at 2:30 pm #18554

tvanbuskirk

Maybe a tad paranoid but wondering if it would be wise to re-use the soil used to grow Ricinus communis (the highly toxic castor bean plant.)

April 24, 2010 at 10:13 pm #18555

Leslie

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.

April 26, 2010 at 6:47 pm #18556

margaret

I have grown castor bean in the ground in multiple years with other plants beside it, and never seen any lasting effects.

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