hello,i have a b.northern lights that has been sliding downhill steadily for a few weeks. i decided to start a new plant with a 3' piece of rhizome and 2 leaves.did this 2 days ago.this morning i checked and both leaves are all shriveled up.what's going on?i've never had this happen before.it's under bright fluorescent lites,was waterd a little.can anyone help me figure this out?thank you all for your time.