Cleft grafting led to similar plant growth of yellow passion fruit on five Passiflora spp. P. gibertii outperformed other wild species for potential use as rootstock. Structural disorganization in the graft connection was observed on P. alata and P. nitida.. Phenolic compounds were observed in the graft union suggesting partial incompatibility. The graft connection may be enhanced on hybrid rootstocks of P. edulis with wild species.