Opal Plum trees are very reliable and good quality producing heavy crops of reddish-purple fruits. These fruits are firm and round with golden yellow flesh that is delicious and slightly sweet. White, scented flowers appear during the spring. Plum Opal has the latin name Prunus domestica 'Opal' and grows to a height of 4 metres in 10 years. The cropping period for Prunus domestica is early season (late July). Opal Plum trees are best grown in sandy or loam soil types and prefers to be positioned in full sun.