Well, I harvested my apios for the third year, and I'm a little dissapointed. I used a bigger container, with more sunlight, and my tubers are smaller. Granted I have more of them than usual, but I suspect that the older a mother tuber gets the more it devotes energy to itself. The mother tubers have grown a fair amount, though honestly I forgot to measure at the beginning. Also, it was hard to track down (in the mess of roots) which mother tubers produced which offspring since I had quite a few sharing the contianer. It may be that my soil was bad or oversaturated with mother tubers. Also, I was using potting mix a few years old. Anyways, I'll be trying again next year with hopefully some more insight into this nifty legume.

Considering all that 'abuse', I'd say they turned out pretty well.