Well here's the end (nearly) of our jerusalem artichoke plants - they died rather suddenly actually! I guess the cooler change during the past few nights hit the plants hard and triggered the dieback (which is normal at this time of year of course). The strange thing was there are still some plants growing in the high round raised beds and for some reason these jerusalem artichokes came up a month or more later than the ones in the lower raised beds even though they were all planted at the same time. I'm not sure why this happened - maybe someone could have a guess? There's heaps of tubers and we'll need to use the ones dug pretty quickly otherwise they'll go soft. I tend to only dig them up when we want a few to eat (because that way they stay hard buried in the ground) or at the beginning of the season in spring to separate and spread out to grow. I wrote a review on Jerusalem artichokes here for those who are interested - I wouldn't call it one of my all time favs but I do still like growing it as a substitute carb.