This report summarises the results obtained in the fourth and last year of the European project " larch wood chain " (task 4.1.). Four organisations were involved in this task devoted to the production of improved varieties. The activities were connected to flower stimulation, pollen and pollination, seed technology. - Flower stimulation - First, girdling enhanced flowering in European and Japanese larch grafts in an Irish orchard and the combination of girdling and gibberellin 4/7 injections did not result in a further increase in flowering. Second, rootstock characteristics (vigour, flowering ability) did not affect graft flowering. Third, potted grafts grown outdoor except at the time of flowering performed better than field-planted grafts and especially indoor potted grafts. - Pollen and pollination - Artificial maturation of male strobili resulted in low pollen yield because that process reduced the % of strobili that opened and released pollen and pollen yield per open strobilus. Male strobili should be collected as close to dehiscence as possible. Moreover, optimal activity of water for pollen storage should be between 0.20 and 0.45. - Seed technology - First, high germination rates were obtained in seeds collected in summer and fall then stored for two years. Therefore, the seeds are mature as early as August in SW France. The existence of a slight dormancy was confirmed. Second, machinery for seed extraction was tested. Third, seed sorting in alcohol was not effective because separation of full and empty seeds was incomplete and the floatation treatment was phytotoxic.