I have read somewhere that spuds like a pretty low Ph and scab is one of the consequences of a high Ph. My Ph is plenty high. I can easily grow spuds but they are pretty scabby.
I have access to bushels of tree leaves, mostly cottonwood. Has anyone messed with making and using leaf tea? My guess is that the tea would be pretty acidic. Maybe I could use it to treat my potato rows and cut down on scab.