3yrs ago I planted 2 grapevines on each side of a trellis in full sun..the grapevines are growing well with big leaves and no insect problems..a few wks ago I started to get tiny grape clusters on both sides about 1/16inch in diameter since then they have either all dried up or fell off. is this a common occurance with grapes... last year I did get a few clusters of mature grapes on one of the vines thks very much Jimbren hope I did this right its my first time posting. looking forward to comments..