Grafting to current persimmon growth

This is re persimmon grafting.

Are my chances of success significantly lower if i grafted to the current years greenish growth vs the previous year’s growth? I have some scions in the fridge from march. Unfortunately, the available branches on my rootstock are only this year’s growth. My other option is to just keep the scions in the fridge and graft next year spring but I’m not sure if the scions would still be viable by then.

Any inputs from the persimmon experts?