 The study assessed the growth and productivity of four sweet cherry cultivars grafted on colt and Gisela 5 rootstocks, finding that trees on Gisela 5 had higher fruit set and lower yield per tree compared to colt, suggesting that Gisela 5 should be used as a rootstock in high-density sweet cherry production systems. This article was authored by Bicircamillic, Yelena Kalajtsik, Zoran Kezerovic, and others.