Right keep low doses no more than 10 seeds of the 2 talked about here. Personally I don't think anybody will have anything bad happen with 1 datura seed of any species whether it's metel,ceratocaula,wrightii etc. The talked about species here do vary slightly by variety just like metel talked about before,(ex metel var. rubra,var. fastuosa etc. ) stramonium has about 6 varieties maybe more var. Inermis having spineless pods.