I received a request for information that has intrigued me. I am not able to answer, but perhaps one of you has an idea. I didn't think Amorphophallus would stand the winter in Ohio. Isn't it semi-tropical? Here is the query: About 15 years ago we received 1 bulb of the Amorphohallus rivieri. At last count we have 75 plants growing around our property. These 75 have not been planted or in any way encouraged. They just sprout where ever they choose and surprise us in out of the way locations far from anyother clumps. If they are a bulb, how are they spreading? In all these years we have only had one plant produce seed. Each spring there will be only one or two that bloom, for which I am very thankful!! I have done internet searches and am unable to find an answer to the abundant proliferation of this unique plant on our property. We live in Cincinnati, OH. Diane Whitehead a long long way from Ohio.