This study explored period product resources and needs in Missouri schools from the perspective of school nurses. We conducted eight focus groups with school nurses (n = 51) across Missouri using purposive sampling. Focus group data were analyzed in Dedoose via multiple coders and achieved strong inter-rater reliability (Cohen's Kappa = 0.92). Several interconnected themes with associated sub-themes were identified. First, school nurses do not have sufficient resources to help students manage menstruation and minimize menstruation-related absenteeism. Second, schools' heavy reliance on donations can lead to inconsistencies in supply and a mismatch between what is donated and what is most needed. Third, school nurses desire additional educational resources around menstruation management for students and caregivers. Nurse-identified themes can help inform recommendations for improving schools' response to students' menstrual hygiene needs by highlighting priorities for educational content, resources, and product acquisition with a goal of ensuring the suitability and sustainability of MHM in schools.