 The experiment found that fruit yields from well fertilized, pest-protected cherry trees in Poland were medium-high and of good quality, but productivity index was low. The fruits contained high amounts of sugars, vitamin C, anthocyanins, flavonoids, and phenolic acids, with cyanidine-3 glucosyl retinoside and cyanidine-3 retinoside being the most important anthocyanins. The least productive cultivar was nephros, while lotoka was the most productive with the highest vitamin C and flavonoids content and lowest total sugars and monosaccharides content. Residues of dodein and thiocloprid in the fruits were below the permissible maximum level. This article was authored by Andrei Boroi, Eulina Krizanowska, and Magdalena Kaplan.