'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.
usually not toxic to people, (large) pets and livestock
Soil type
clayed soil, loamy soil, sandy soil
Paving
tolerates no paving
Winter hardiness zone
6 (-23,3 to -17,8 °C)
Other resistances
resistant to frost (WH 1 - 6)
Fauna tree
valuable for bees (honey plant)
Application
small gardens, patio gardens
Shape
clearstem tree, multi-stem treem, clearstem fruit tree
Clearstem fruit treeClear stem treeMulti-stem treeclay soilloamy soilsandy soiltolerates no pavingresistant to frost (WH 1 - 6)2nd size, between 6 and 12 metreshalf-open crowngreenwhiteaverage growingvaluable for bees (honey plant)non-toxic (usually)Capricious growingOrnamental fruitFragrant flowersEdible fruits
Frequently asked questions
Prunus domestica 'Opal'
Prunus domestica 'Opal' can eventually reach a height of 4-6 m, depending on the site and climate conditions.
Prunus domestica 'Opal' is average growing and can eventually reach a height of 4-6 m, depending on the site and climate conditions.
The right time to plant Prunus domestica 'Opal' is during the dormancy period. In Western Europe, Prunus domestica 'Opal' with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.