Prunus domestica Opal - Common plum
Prunus domestica Opal - Common plum
Prunus domestica Opal
European plum, Common plum, Garden plum
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Description
The Opal Plum is a fairly vigorous, productive and regular variety. It produces small round, slightly oval, purple-red plums with juicy, tasty flesh. The harvest of this early variety starts in late July and continues into August. The Opal Plum is self-fertile and proves to be a very good pollinator. It is resistant to diseases.
The origin of plum trees is said to be Syria, not China. During the time of Roman rule in the region, various local fruits including plums were introduced to Rome. The Opal Plum is a variety selected in Sweden in 1925, in Alnarp. It is the result of cross-breeding: Early Favourite with Reine-Claude d'Oullins.
This fruit tree naturally grows up to 5m (16ft) tall at maturity. Its upright silhouette is good and it will be easy to harvest when pruned properly. It enjoys sunshine or partial shade, sheltered from the wind and grows in any type of rich, moist, deep and even heavy soil, without limestone.
Its leaves are ovate, almost oblong, toothed and slightly hairy.
Flowering occurs in late April when tree is completely covered in white flowers that appear on the previous year's shoots. They are self-fertile and this variety is perfect for pollinating many other plum trees.
It produces small round, slightly oval, purple-red plums with juicy and tasty flesh.
Plums can be eaten raw from the tree, in fruit salads, in desserts and pastries or as an accompaniment to meat dishes. They are made into jams, of course, but also into syrup fruits, compotes... They are also used to make brandy.
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Prunus domestica Opal - Common plum in pictures
Plant habit
Fruit
Flowering
Foliage
Planting and care
The Opal Plum is easy to grow and thrives in any type of light, rich, neutral or acidic soil which is moist but not wet and without limestone. Ensure proper drainage with a thin layer of gravel in the planting hole. Dig a hole two to three weeks before planting, twice as wide and deep as the pot. On the day of planting, place the tree with its pot in water, allowing the entire root ball to be moistened by capillary action. Add compost to the bottom of the hole. Place the tree in the hole, fill with a mixture of soil and compost. Do not bury the graft union. Firmly pack the soil around the base. The root ball should be completely covered. Water generously. You can add a small handful of wood ash in winter as it is rich in potash and can improve fruiting.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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