One of mine (a jumbo Mt. Hood from freshops!) had what I'd guess is the same white mold, after a little over a week in the fridge with too much moisture in the bag. The mold looked just like the mold you see surrounding brie cheese. I took out the rhizome , did my best to scrape off the mold (yeah, right) and stuck it in a pot outside (mid-March, zone 8, N. California). About a week later, and some light rains, several bines have sprouted! Right in sync with the reemergence of some nearby grape vines that wintered over in pots.no clue, you should wash them and put them in the dirt, hops seem to be pretty hardy plants!