Plum, 7 gal, Mount RoyalConsidered the best blue plum. Extremely hardy, late summer, freestone plum with blue skin and firm yellow flesh. Spreading canopy. Self pollinating but will benefit from cross pollination with European plum varieties. Good eating fresh, processing or drying. Prefers a well drained soil. Attributes Type: Fruit Tree Parentage: P. domestica Fruit Size: 4cm Fruit Colour: Blue Height: 4m (13 ft.) Spread: 2. 5m (8 ft.) Zone: 3 Sun Exposure: Full Sun