Hypericum frondosum Sunburst - St. John's Wort
Hypericum frondosum Sunburst - St. John's Wort
Hypericum frondosum Sunburst
St. John's Wort
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This plant carries a 24 months recovery warranty
More information
We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
Hypericum frondosum 'Sunburst' is a well-known and appreciated cultivar of St. John's Wort that forms a dense, compact, and upright bush. In summer, its large golden-yellow flowers and clusters of dark red fruits bring life to its beautiful glossy blue-green leaves. The mature stems exfoliate from cinnamon to purple. All these features make it a plant of enduring interest for many months. It thrives in full sun or partial shade in borders, rockeries, edges, or even in a container on the terrace.
The 'Sunburst' St. John's Wort belongs to the family of Clusiaceae. It originates from the species Hypericum frondosum, native to the central and southeastern United States. St. John's Wort forms compact bushes that flower abundantly from the first year in the garden and bear fruits generously and regularly. The 'Sunburst' cultivar reaches a mature size of 90cm to 1.20m in all directions depending on the growing conditions. It has a dense and rounded habit, with a spreading port supported by reddish to purplish stems. The stems bear long, semi-evergreen to evergreen, entire leaves. These elongated, pointed, leathery leaves are a beautiful dark bluish-green, turning reddish under the influence of winter cold. It flowers for almost four months of the year, from June-July to September-October, with a break during the hottest weeks. The flowers, produced abundantly, are 5cm in diameter and composed of 5 rounded, golden-yellow petals arranged in an open cup. The centre of the flower is occupied by a crown of protruding, orangish stamens. This flowering is followed by the formation of a few conical fruits that turn red and brown when ripe.
St. John's Wort is appreciated for its very long flowering period and its ease of cultivation in all types of soil and under all climates, even by the seaside and in shade. If you like yellow flowers, 'Sunburst' is one of the small bushes to plant in a brand new garden, even if you are a beginner in gardening. It excels in low shrub borders or perennial beds, but also on the terrace or balcony, planted in a large pot. For example, it can be combined with summer-flowering perennials such as flamboyant Crocosmias, Agastaches, Echinops, and Rudbeckia. Also consider foliage plants such as Euphorbias or Physocarpus. Its long-lasting flowers and fruit-laden branches can be used in floral arrangements.
Plant habit
Flowering
Foliage
Planting and care
Plant 'Sunburst' Hypericum in a very sunny location north of the Loire, or in partial shade, in a warm climate, sheltered from the wind. Its foliage can be damaged by excessive sun. This St. John's Wort adapts to almost all soils, as long as they are well prepared. The soil pH is indifferent to it, but it should not be excessively acidic or excessively chalky. It needs a light, well-drained soil, deep enough to allow it to better withstand dry summers. It is hardy, resistant to diseases, and its enemies are rare. Carry out shaping pruning after flowering, or in early spring.
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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