Q.Grape vine. Last year my vine had 14 bunches of grapes
This year there were 2 bunches that started then they stopped growing and all dropped off,although the vine is healthy and growing well.I have fed it once a fortnight with blood.
Certified GKH Gardening Expert
There are quite a few reasons why this can happen. This article will go over the most common reasons, so that you can begin to narrow down the possibilities: https://www.gardeningknowhow.com/edible/fruits/grapes/how-to-get-grapes-on-vines.htm