In this study, it was aimed to determine the bud structure and floral development periods of Summit, Heritage, Aksu kırmızısı and Willamette raspberry cultivars produced in Ankara (Ayaş) conditions. Summit, Aksu kırmızısı and Willamette are cultivars to produce floricane fruiting. Being a plant to produce two cultivars at harvest, Heritage is applied as Heritage I, to produce floricane fruiting and Heritage II to produce only primocane fruiting. During the experimental period, buds collected once in every two weeks from raspberries were tested in the solution including formalin, acetic acid and alcohol (F.A.A.) for 24 hours. At the end of 24 hours, these buds were taken into 70% ethyl alcohol including solution. Buds in the solution including ethyl alcohol were observed using binocular microscope by opening technique and their periods were tried to be detected. In order to detect floral development periods, in addition to the “Opening Technique”, “Paraffin Technique”, described as a microtechnic method, was also used. It was determined that, raspberry plant has a mixed bud structure. The raspberries that produce summer fruit in Ankara (Ayaş) conditions with Opening and Paraffin methods had “Floral Development” between March-May and “Morphological Distribution” took place during March while raspberry that have autumn fruit completed its “Floral Development” between May-July and “Morphological Distribution” took place on May. Two months after bud distribution, blooming was detected to take place and approximately 1.5-2 months after blooming, fruits were observed to be ripe.