Sunchoke Produced Tremendous Growth Above Ground But No Rhizomes At All.

Question

The stems range from 10 to a little over 15 feet tall and are very robust. A plant died and after removal and digging underneath it, there are no rhizomes or signs there ever were any.

Answer 1

It is possible a rodent of some kind beat you to it. Make sure the sunchokes get plenty of water as that will promote good tubers. Here is more on their care:

https://www.gardeningknowhow.com/edible/vegetables/jerusalem-artichokes/growing-jerusalem-artichokes.htm