I've got access to about 30 Scotts Pine trees and I want to tap them to obtain resin. What would be the best time to do this without damaging the trees. Also, what would be the best method of tap?
I have tried several methods of tap (mainly in spring time) but got very little return (a few pea sized drips at best). Short of ripping large areas of bark or felling (unacceptable) I'm not sure how to get a better harvest. I estimate I need about a 1/4 pint of resin per season.