If you eat the grapes in a dream, then such dream shows your desire to give happiness and joy to others. The grapes are also the symbol of fertility, abundance and rewards. If you are eating the grapes in a dream, then such dream shows the wealthy and happy life you are going to have. If you are picking up the grapes in a dream, then it shows how your dreams and desires are becoming the truth. Because of the hard work you made you are being rewarded and subconscious mind of yours is sending you this message.
Read more about dreaming of Grapes in other dream meanings interpretations.