'Opal' is one of the best-known and most widely used plum varieties. It is, especially when young, a strong-growing tree with a bushy, slightly jagged, semi-open crown of 4-6 m in height. The crown is round, although the stem branches initially grow up quite steeply. The tree flowers in April with lightly scented, white blossom. 'Opal' is a self-pollinating variety, but to ensure good fruit bearing at all times, it is best to plant a tree of another plum variety nearby. Preferably, 'Czar' or 'Victoria' is used for this purpose. The plums of 'Opal' are relatively small, ovoid and reddish-blue to purplish-red in colour. The flesh is yellow-green, juicy, aromatic and pleasantly sweet. The plums are ready for picking in late July-early August. They are great for direct consumption or for making purée. It is an easy, good-growing variety that usually produces many plums and is also particularly suitable for use in private gardens. 'Opal' was created in 1946 at the Swedish testing station in Alnarp, from a cross between 'Early Favorite' and 'Reine Claude d'Oullins'. Hardiness zone 6.
Prunus domestica 'Opal' môže dorastať do výšky 6-8 m v závislosti od podmienok stanovišťa a klímy.
Prunus domestica 'Opal' rastie priemerne rastúci a môže dorastať do výšky 6-8 m v závislosti od podmienok stanovišťa a klímy.
Správny čas na výsadbu stromu je mimo vegetačné obdobie. V strednej Európe môže byť Prunus domestica 'Opal' so zemným balom vysadený od polovice novembra do konca apríla, avšak závisí to veľmi od klimatických podmienok a druhu stromu.