Is Sunchoke a dynamic accumulator?

I will be growing sunchoke for the first time next year, and I’ll probably try eating a few tubers but I’m more interested in using the leaves as food for my pet bunny, and as a summer privacy screen. I hope it will also provide a lot of biomass for my compost if I cut it back in fall.

I’ve been wondering why it doesn’t appear on most dynamic accumulator lists I’ve seen? Like comfrey, it sounds like it must have fairly deep, resilient roots and you can hack it back repeatedly without weakening its growth.

That is a good question!  I’m wondering...do the tubers require more than they give back?  They are shallow tubers here..not deep like comfrey.  But they do provide lots of top to use and here they spread like crazy. If you’ve never grown them...pick a spot you’ll always want them.

My limited experience suggests that the roots are fairly shallow - maybe the top 8 inches of soil. They don't really form a strong root system compared with eg comfrey. They survive year on year by leaving multiple tubers in the soil to regrow from. The rest of the root system dies back.