Moved here from England and cannot believe that this plant--which we've been religiously digging out by the tubers and toss away as they're so big and invasive--is so great and we've wasted it year after year!
It comes up each year, more and more of it, from tubers that get missed deep in the ground; this year we've got rid of so much of it, but the few plants left and (later on) the tubers that sprout where we missed the, I'm going to make a friendlier bed for and see what happens. I adore the taste of waterchestnuts and artichoke hearts, so it's a win-win for me.
Are they best harvested in Fall once the foliage has died back? I'm asking because the rainiest season here tends to be early summer.