An increase in floral display size may enhance fitness by increasing a plant’s attractiveness to pollinators. Alternatively, a larger display may reduce fitness by increasing pollen movement within an individual. In dichogamous species the frequency of this geitonogamy also depends on floral gender ratio and pollinator response to floral gender and to inflorescence architecture. We explored the relationships of floral display size and dichogamy to potential geitonogamy in Campanula americana, a protandrous herb. We observed pollinators in a natural population, in which individuals differed in display size, gender ratio, and distance to conspecifics, and in experimental arrays, in which individuals differed only in display size. In both settings, bees responded to increased floral displays by increasing the number and length of foraging bouts. The number of potentially geitonogamous visits, those to female‐phase flowers after male‐phase flowers, also increased with display size. In addition, although propo...