The research aims to investigate the effects of different rootstocks on productive and qualitative aspects of two watermelon cultivars: Dumara, that produces big fruits and Minirossa that produces smaller fruits. For each cultivar, a randomized complete-block design was used with 3 replications to compare the following six grafting combinations: grafted plants into five rootstocks (Elsi, RS 841, Shintosa, Lagenaria corta, Anguria selvatica) and ungrafted plants. The highest yield of both cultivars was obtained with RS 841 while the lowest was observed with not grafted plants and grafted on elsi. However, using Elsi as rootstock, the plants gave fruits of greatest size. the best quality parameters (aroma, sweetness, overall opinion) were assigned to the fruits of not grafted plants.