Long story short, they grew incredibly vigorous the first couple years, lots of fruit, but never made it to ripe due to pests. Discovered that moles were doing a lot of damage to the roots last Year at least. The vines seemed to shrink. This year, one in the back appears completely dead and the other two are dead all the way back to the base where their getting pathetic looking shoots. Is it possible they are permanently stunted and it’s better to start with new vines?