Hello Frank, I wonder about the Saran wrapping with humid winter's like ours. One fall I placed my tuber's, in very dry wood shavings that had been dusted with powdered garden sulphur, but still I had some tubers too dry and shrivelled, so that they never broke up dormancy.Did you ever try a similar method ? What would be your normal sprouting expectancy? Thank you, warmly from the southern hemisphere. Arturo