Silphium perfoliatum
Silphium perfoliatum
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Renée O.
N/A
Renée O. • 63 FR
Silphium perfoliatum
Silphium perfoliatum
Cup Plant
Planted to follow up for next year maybe to see some growth.
Nath44, 04/12/2024
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This plant carries a 12 months recovery warranty
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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.
From 7,90 € for pickup delivery and 6,90 € for home delivery
Express home delivery from 8,90 €.
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Description
Silphium perfoliatum is a very tall perennial with yellow head flowers, from the same family as sunflowers, but perennial!
This very tall perennial is native to the plains of central-eastern North America and has a robust crown which large, quadrangular, straight stems emerge from in spring, over 2 metres (7 feet) tall but unaffected by wind.
The matte green, lanceolate leaves can grow to measure over 50cm (20in) long in deep and moist soil. These leaves are sheathing the base of the stems and often retain rainwater which is why the plant is nicknamed "bird bath".
The flowers look like large golden yellow daisies, 7cm (3in) in diameter and bloom in summer at the ends of the branched stems.
This is the perfect plant to accompany tall grasses such as Miscanthus or Cortaderia in an open and sunny garden.
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Silphium perfoliatum in pictures
Flowering
Foliage
Plant habit
Botanical data
Silphium
perfoliatum
Asteraceae
Cup Plant
Cultivar or hybrid
Other Silphium
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Planting and care
Grow Silphium perfoliatum in moist, rich, deep, heavy or light soil without excess moisture in winter.
Planting period
Intended location
Care
Planting & care advice
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Reply from on Promesse de fleurs
Summer flowering perennials
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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).
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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.