This recipe calls for a little bit of sugar but you can add less or more depending on your own personal preference. It will also depend on the sweetness/tartness and ripeness of your grapes you make the grape juice with!
CAN I SUBSTITUTE HONEY FOR SUGAR!
Absolutely! Once again, depending on how sweet and ripe your grapes are will depend the amount you will want to add. You can start by blending the grapes and water, taste test it, and then add honey till desired sweetness.