Imperial Epineuse Euro PlumItalian -10 CollectionsWashington/WSU EB 0937 Fruit Handbook for Western WashingtonWashington/WWFRF Recommended VarietiesOregon/OSU SB 582 Plum Varieties for OregonHarvest Timeslate July to early August [ref]September 10 to September 20 [ref]