Is potato compatible to pumpkin when grafted?

Potatoes and pumpkins are not typically compatible for grafting. Grafting is a horticultural technique used to join the tissues of two plants together in order to combine desirable traits from both plants. Potatoes and pumpkins are from different plant families and have different growth habits, making it unlikely that they would be successful grafting partners. It is more common to graft plants within the same species or closely related species.