Douglas-fir recently suffered significant diebacks following drought episodes. Whether Douglas-fir is able to adapt to the new climatic conditions is a major concern for forest managers and scientists. We investigated the intraspecific variation of cavitation vulnerability, a key trait in plant survival to severe drought stress. We aim to compare the adaptive potential to drought of provenances from part of the Douglas-fir natural area. We collected branches of a 25 year-old Douglas-fir provenance trial replicated in two sites in the south of France. Four Washington and four Oregon provenances were compared to twenty provenances from coastal and interior regions of California. We collected two branches on twenty trees per provenance for a selection of ten provenances to estimate cavitation vulnerability. The first results show a relatively low provenance variation for cavitation vulnerability in both sites, with a strong site × provenance interaction. Whether the relatively low between-provenance variation for cavitation vulnerability is a significant improvement of the resistance to drought potential remains an open question. In the next steps we will investigate the relationship between micro-density and resistance to cavitation and use it to extend the adaptation potential study to the 28 provenances and to others genetic trials.