Climate, drought and hydrology drive narrow-leaved ash growth dynamics in southern European riparian forests

•We analyzed climate, drought and hydrology effects on Fraxinus angustifolia growth.•Diverse growth responses to climate and drought reflected the large bioclimatic range of the study.•Growth responses intensified in warmer sites and at longer time scales.•Growth was more coupled with hydrologic regime in sites with least human alteration.•Climate warming will negatively impact Mediterranean riparian ash forests.