Greg - I've got them in organic raised bed soil with some compost.
Karl - Wow, thank you so much for the information! This is extremely helpful. I'm in MA, so very similar temps.
I was not planning to plant Jerusalem artichokes, so no problems there!
That makes sense re: molding in transit. They were just packed in a plastic sleeve, and it looked like maybe some amount of water was added to keep them moist. But, most appear fine at least outwardly.
I had read that they can really take over, but wasn't sure how often that in fact happens. Thanks for the tip on that.
And thank you for the info that they don't transplant that well. Our trees here aren't fully leafed out yet, so I have to wait to pick the exact spot to make sure they'll get enough sun :/ But I will be sure to make a plan sooner rather than later...in hopes that they do work out! Hopefully I won't need to ping you in the fall