Dianthus barbatus Summer Sundae Seeds - Sweet William
Dianthus barbatus Summer Sundae Seeds - Sweet William
Dianthus barbatus Etournelle Formula Mix
Sweet William
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Description
Sweet William 'Summer Sundae' is a beautiful selection of flowers from seed in the first year. The abundant blooms display a rich array of colours, from white to purple and various shades of pink. Very robust and cold-hardy, they form very floriferous clumps of bluish-green foliage in late spring and early summer. Ideal for cutting, this selection is suitable for growing in pots and self-seeds abundantly. It is easy to grow in cool, rich, well-drained soil, in full sun or partial shade.
Dianthus barbatus is a biennial plant that belongs to the Caryophyllaceae family. It occurs naturally in temperate regions of Europe and Asia—this cold-hardy plant generally flowers in its second year after sowing. 'Summer Sundae' brings together several fast-growing varieties, producing flowers in the first year from seed. Plants quickly form a very dense basal clump of long leaves with pointed tips, light green to bluish green in colour. They vary in size from 45 to 60 cm tall in full bloom. Flowering takes place in late spring and early summer. The small flowers are gathered in flattened clusters, from 8 to 15 cm in diameter, carried at the end of thin yet sturdy stems. They vary significantly in colour, often featuring two tones and attractive markings. Some plants produce blooms that gradually change colour as they age. Sweet William flowers have a gorgeous spicy and lovely scent, with notes of cloves and cinnamon.
Sweet William is an easy plant to grow and is very low maintenance once established. Like bellflowers and columbines, it effortlessly fits into any garden. Grow along passageways such as garden paths or near an entrance to enjoy its sweetly scented blooms fully! Grow en masse in flower beds and borders to create beautiful drifts of colour. Dianthus barbatus is suitable for container gardens, in pots on the terrace or balcony. Make sure to provide the plants with perfect drainage and a little fertiliser.
Flowering
Foliage
Plant habit
Botanical data
Dianthus
barbatus
Etournelle Formula Mix
Caryophyllaceae
Sweet William
Cultivar or hybrid
Planting and care
Sow seeds indoors or in a greenhouse, from January to February as a late-flowering annual, or from June to July to see them flower in spring.
Sow on the surface of good quality, well-drained potting soil. Place the seed tray in a mini-greenhouse at a temperature of 15-20°C, or in a clear polythene bag until germination, which takes 7-21 days. Keep the potting soil moist, but not soggy, and don't exclude light.
When the seedlings are large enough to handle, transplant into 8 cm pots and allow the plants to develop in cooler conditions. Once all risk of frost has passed, gradually acclimatise them to outdoor conditions for 7-10 days before transplanting them outdoors. Keep a distance of 30 cm between plants, and plant them in any fertile, well-drained soil in full sun.
Sowing period
Intended location
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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