Research on reproductive biology is challenging yet valuable when studying species such as Spathodea campanulata P. Beauv, which has morphogenetic variety and greater soil adaptability. These species are important from a socioeconomic standpoint. This study examined a variety of factors, including phenology, pollination, breeding systems, and seed germination. In this species, natural pollen transmission was quite effective. Fruit set was rather high after open pollination and significantly lower after hand pollination, most likely as a result of damage to stigma during experimentation. However, some selfing happened by xenogamy mode, since 39 fruit sets were obtained from bagged panicles. Pollen germination was at its optimum at 5% (50.44±1.16%) sucrose solution, while the best combination of 5% sucrose and 100 ppm boric acid produced a maximum tube length of 112 μm and 51.77±2.33%. The species appropriate for wind and insect pollination. A significant quantity of airborne pollen grains on glass microscopy slides with glycerine put on them indicated that pollination was occurring by wind. Acridotheres tristis was the primary and authentic pollinator among insects, with the others acting as either minor or passing visitors. Our research showed that inadequate xenogamous pollination and resources may be limiting natural fruit set in S. campanulata.