This is my first attempt at growing vegetables. I put a few Jerusalem artichokes into sandy loam soil, and with very little watering they have grown like crazy. The leaves on the bottom are starting to die off, but online references say to wait until late Fall and a drop in temperatures. Should I be waiting for all of the leaves to show signs of die-off, top to bottom, and trust that the tubers will stay intact after the plant is dead/dying? Other than waiting for the leaves to die, are there any other signs that would tell me the plant is ready to harvest? Should I have been fertilizing this plant at all?
