Gomortega keule is endemic to Chile and belongs to the monotypic family Gomortegaceae. Although it produces edible fruits and good-quality wood, it is not cultivated. Information on reproductive phenology may help address conservation and cultivation practices. However, there is limited knowledge about this species. This research aimed to investigate the phenology of G. keule. Inflorescences and fruits were monitored over one year in a natural population. Flower bud development extended from early January to April (summer to mid-autumn). Flowering peaked from late April to mid May, while fruitset occurred from autumn to late spring. The fruits seemed to have originated in different years, as supported by a number of observations. From these observations, a complete fruit phenology was inferred, with a notably long growth period, suggesting that 17–20 months are required from fruitset to senescent fruit fall.