"My side" wrote:

I have now chopped down the stalks and the ground in the area is full of
good sized tubers. Now I need to know:
1. Do I have to dig up all the tubers.
2. How to store some for replanting next spring.

I live in Vancouver BC where frost is not guaranteed. Will this make a
difference in the methods of harvesting and/or storing?

Don't dig them up unless you want to use them. They're perennial, and can take
hard winters just fine.
Also, if you dig'em up and replant them _elsewhere_ next spring, you'll have
jerusalem artichokes in two places.

Resign yourself to always having jerusalem artichokes where they are right now.
Every bit of root that's a bit larger will sprout a new plant.

The only way to really get rid of them is for them to contract a sort of root
rot. You don't want that, because then you won't be able to grow jerusalem
artichoke near that spot anymore. It's a pretty plant, flowering late in autumn.
Very tall too: whoever wanted tall plants, this one is one, too.

The leaf can be used as a mineral-rich tea
The flower petals are edible but not all that soft.
The tubers, when ingested with simple carbs, slow down sugar release into the
blood, as they're loaded with inulin (a sugar we can't metabolize)(which is NOT
insulin, a hormone we need for our sugar metabolism)(the name inulin comes from
Inula, elecampane; inulin was first found in the roots of that plant).

Henriette

--
Henriette Kress, AHG Helsinki, Finland
Henriette's herbal homepage: http://www.ibiblio.org/herbmed
Henriette's herbal blog: http://www.henriettesherbal.com/blog