Regional climate moderately influences species-mixing effect on tree growth-climate relationships and drought resistance for beech and pine across Europe

•Patterns of mixing effects on pine/beech growth-climate relationships were analyzed across Europe.•Tree growth-climate relationships were driven by the regional climate conditions.•Differences in climate-growth relationships between pure and mixed beech stands were evidenced in the driest climates.•On average, mixing had no significant effect on resistance to drought events.•Growth reduction during drought events was lower in mixed compared to pure pine stands in sites with higher water balance in autumn.