Hypericum x dummeri Peter Dummer - St. John's wort
Hypericum x dummeri Peter Dummer - St. John's wort
Hypericum x dummeri Peter Dummer
St. John's wort
Plant received in bad condition, weak and with few branches. I planted it right away. I hope it will survive.
Valérie , 19/07/2024
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Description
Hypericum x dummeri 'Peter Dummer' is a fairly recent hybrid cultivar that combines the qualities of its two parents: Hypericum 'Hidcote', of which it is an ornamental and non-invasive miniaturised replica, and Hypericum calycinum, a pretty flower-ridden pest that's almost indestructible. 'Peter Dummer' is a small, compact, prostrate bush, with long and abundant summer flowering in intense gold-yellow cups on beautiful dark green-blue foliage. Excellent ground cover and non-invasive, it will thrive in all soils, and will go without watering once well established. Versatile, colourful, very bright in the sun as well as in semi-shade, it will find its place in rockeries, at the edge of a flower bed, or in a pot on a terrace or balcony.
Hypericum x dummeri 'Peter Dummer' belongs to the Hypericaceae family. This small bush, not exceeding 60cm (24in) in all directions, has a dense and rounded, ramified habit, carried by red to violet stems. They are adorned with long entire leaves, semi-evergreen to evergreen in mild climates. They are elongated, pointed, and leathery. The foliage is a beautiful dark green with slightly blueish tones, taking on reddish hues under the effect of winter cold. It flowers for six months of the year, from June to September-October. The abundant golden yellow flowers, 5 to 6cm (2in) in diameter, are composed of 5 rounded petals arranged in an open cup. The centre of the flower is occupied by a crown of protruding orange stamens, shorter than those of its parent 'Hidcote'. This flowering is followed by the formation of red conical fruits, which are blue at maturity.
St John's wort is appreciated for its very long flowering and ease of cultivation in all soils and under all our climates, even by the sea. The low and bushy habit of Hypericum x dummeri 'Peter Dummer' makes it an excellent ground cover, effective against adventive plants and useful for retaining soil on a slope. It is also a nice front row for the beds of large perennials or flowering bushes. It will also be at ease in front of an evergreen hedge. Plant in groups or with other bushes (buddleia, lilac, abelia, deutzia, althea, or Morning Mist rose), in the sun and sheltered from the wind. It is also suitable for pot cultivation on a balcony or terrace.
Hypericum x dummeri Peter Dummer - St. John's wort in pictures
Plant habit
Flowering
Foliage
Botanical data
Hypericum
x dummeri
Peter Dummer
Clusiaceae
St. John's wort
Cultivar or hybrid
Planting and care
Plant in a sunny or semi-shaded location, or even in shade in a warm climate, sheltered from the wind. Its foliage can be damaged by too much scorching sun. It needs light, deep, well-drained soil as it fears humidity in winter. It can tolerate poor and chalky soil. It is hardy to -20°C (-4°F). It is not very susceptible to diseases and its enemies are rare. Cut back the bush to the ground at the end of winter to maintain a compact habit and encourage the appearance of flowering branches.
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).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.