Background and Aims <p>Leaf pH plays a critical role in regulating plant growth, trophic interaction, and nutrient cycling. While increasing evidence highlights the sensitivity of leaf pH to many environmental factors, it remains unclear how leaf pH responds to the soil acidification induced by increasing nitrogen (N) inputs.</p> Methods <p>We examined the inter-specific variations of leaf pH across 35 plant species from a temperate grassland and assessed the variations of the community-level leaf pH across six N addition levels ranging from 0 to 50&#xa0;g N m^–2&#xa0;yr^–1 in a field experiment.</p> Results <p>We found significant inter-specific variations in leaf pH, with higher pH in grasses than forbs. Leaf pH of grasses showed negative responses to increasing N inputs. Although the dominance of grasses in the communities increased with increasing N addition levels, community-level leaf pH remained stable along the N addition gradient, because the positive contributions of species turnover were offset by the negative contributions of intra-specific variations.</p> Conclusion <p>Our results highlight the interactions between inter- and intra-specific variations in ensuring stable leaf pH of grassland community facing soil acidification induced by increasing N inputs.</p>