I once tried using red plastic as a means to give the crops more useful light. That was in my Dad's garden now gone. So I am stuck with much shade and a oak scorch disease so I am very reluctant to take out healthy trees.
So groping for a way to deal with lack of sun was wondering would a mirror convey the full spectrum for my plants? Or must I cut till the plants say OK? Son broke a large mirror that I have held onto hoping for a use.
It is not that I have not looked about but I favor natural /cheap stuff.