i have been given about 20 concord grape vines to take care of, these
vines are very old and havent been taken care of too much. i have read
a bit about pruning grape vines but my question is is there a point when
you cut the vine completely off at the base?? i ask this because all the
vines are big i mean some of the bases are bigger around than a softball
and are real knarly. or should i just leave them alone and try to work
with what i got? it looks as though every year someone had cut off all
growth to a large stub of vine about 2 ft high.
the old lady called me last fall to come and pick all the grapes and i
was surprised by the abundance of grapes on the vines, i had nearly
200lbs.

what should i do?

mike