A female Glanville fritillary will lay as many as 10 clutches of eggs in her lifetime. These clutches can range in size from 50 up to 300 eggs and are laid on the underside of the larval food plant of either "Plantago lanceolata" (ribwort plantain) or "Veronica spicata" (spiked speedwell). After hatching, the caterpillars feed on their host plants until the end of the summer where they spin a "winter nest" to diapause. When winter is over they emerge from their nest to feed again before pupating around the beginning of May. A month later, the adult fritillaries emerge and go about their adult lives of feeding, mating, and laying eggs.