An experienced bonsaist touched my two pines; a J. Red Pine grafted to JBP and a JBP
HE said needles from the black pine was healther b/c the needles were cooler by touch ? I'm was not aware what touching the needles could indicate the health of the tree. Is there literature about this.....
Thanks Bill D
I've heard that too, but can't cite any sources on the topic.
If the approach does work, it's like taking someone's temperature - some level of care will be needed to get the tree healthy again.