Overwintering adults emerge in spring when broom begins to flower. They congregate on flowers to feed on pollen, which helps stimulate ovary maturation. Eggs are laid singly on the outside of the seed pod. Hatching first-instar larvae burrow into the seed pod wall, sometimes forming visible tunnels, before entering and feeding on developing seeds. The final three instar stages develop completely within seeds; there is generally one larva per seed. Pupation occurs within the seed coat. New adults emerge in late summer, leaving behind round emergence holes in seeds. Adults do not chew their way out of the seed pod, instead relying on the plant’s dehiscing mechanism to escape. Seed pods dehisce, or dry out, and burst open at maturity in order to spread their seeds, thus releasing adult beetles. Adults overwinter away from the host plant. There is one generation per year.