Sphagnum moss in bogs may struggle with higher temperatures and nitrogen levels in the future. A study tested four Sphagnum species from different regions in a greenhouse with varying temperatures and nitrogen levels. The northern species were more affected by temperature, while the southern species were more affected by nitrogen. High temperature and nitrogen reduced moss growth and cover, especially for 'wet' species. Nitrogen levels increased with added nitrogen, showing potential nutrient limitations. A fungal infection in the second year harmed 'wet' species and high nitrogen treatments. Overall, global changes could harm Sphagnum moss growth in bogs, impacting carbon storage.