I don't recall if I asked this question here. The great tree authority Shigo,
based on his experiments & studies, concluded that the best way to treat a
pruning wound is to leave it open to the air.
My bonsai teacher, based on his 40 years of experience, insists that Shigo
never grew a bonsai. He says you must cover pruning cuts on a bonsai to promote
rapid healing. any of you know anything about this?
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)