Both of my grape Vines have flowers that have burst now, do they get pruned off or are the grapes coming behind them? Do I prune off some of them to make the grapes bigger on the other stems? This is the second year, and I have more this year than last.
Los Angeles County California
Thinning of the fruit clusters is done in the winter time when you prune back your vines. If you didn't prune your vines in winter then removing some of the individual vines/clusters is a good idea to thin out the plants for disease and larger fruit.
Here is a good link to pruning grapes: