one thing to try which works with soil is peel the brown skin off and take a thin slice of both ends. ive read that the odds are 1out of 4 sprout on average.
i can remember my mother in law asking if we had skunks around the house when i had my room exhausting strait outside. needless to say there is now a carbon filter.
i used amsterdam seed co. without doing any research. seeds were here in a week, they also tossed in a free 10 pack not sure what they are, i have a few going with ?1 and ?2 on their tags. next time i buy seeds i will probably try a different bank thinking about attiude.