The aim of this work was to study possible differences between fully and half-compatible pollinations for pollen tube growth and fruit set in two self-incompatible almond cultivars. For this, flowers of the cultivars 'Masbovera' and 'Primorskyi' were emasculated and cross-pollinated with pollen of cultivars sharing one allele (half-compatible cross) or any allele (fully-compatible cross). Dynamics of pollen tube in the pistil at different times for each cultivar and pollination type were observed by fluorescence microscopy. In addition, fruit set and fruit drop were determined. Despite the results showed no differences between half- and fully-compatible pollinations for the germinated grains on the stigma, the number of pollen tubes reaching the ovary was significantly higher for the half-compatible pollinations. However, such differences do not seem to have an effect on fruit set and fruit drop.