|Hybrid yacon roots|
|Small but perfectly formed proper yacon root|
In any case, they are enormous plants, towering at three metres or more in height. I put this down to heterosis - hybrid vigour - which often occurs when plants are crossed. No seeds have been set to date, sterility being another common occurrence with hybrid plants; they certainly flowered profusely though, despite the miserable weather last summer. But this summer is going to be different, right?