I air layered this tree last year and life got in the way and I accidentally left the layer on through the winter. I discovered that there are/were lots of roots when I removed the wrap on the layer. Based on the look of the roots I'm not sure if they are dead or not and the moss was dry when I checked the roots. The tree has leafed out and flowered above the layer but before I cut it off I wanted to make sure the roots were alive. Is there a way to tell if the roots are still alive? And if dead, should I just re-do the layer later this year since the tree is still growing above the layer? Thanks.