E.J.H wrote:
Hi guys. Might I suggest that you remove the bark from the stick, throw the
stick away, flatten the bark as best you can and mount your plants onto the
bark. A stick without bark is simply a stick. I'm not familiar with
'grapvine' bark...

Grapevine bark is thin, stringy stuff. Your advice is irrelevant to
it.

Cork, a popular mounting substrate is, of course, bark.

J. Del Col