Allium senescens subsp. montanum Summer Beauty
Allium senescens subsp. montanum Summer Beauty
Allium senescens subsp. montanum Summer Beauty
Allium senescens subsp. montanum Summer Beauty
Allium senescens subsp. montanum Summer Beauty
German garlic, Mountain garlic, Pink lily leek, Ornamental Onion
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Description
The Allium senescens 'Summer Beauty' is an ornamental onion that stands out for its long and beautiful summer flowering in a vibrant purple-pink. With its compact habit and dark green leaves that remain decorative for a long time, this variety is ideal for adorning borders, pots, and sunny beds. Easy to grow, very hardy, and drought-resistant, it offers great flexibility for gardening enthusiasts. Its flowers are very long-lasting as both fresh and dried cut flowers.
The Allium 'Summer Beauty' belongs to the Amaryllidaceae family, known for its ornamental and edible species. Commonly called ornamental onion or German garlic, this cultivar is a horticultural selection. The species type Allium senescens is sometimes referenced under synonyms such as Allium montanum. Native to temperate regions of Northern Europe and Asia, particularly from Siberia to Korea, this species is typically found in dry meadows, rocky areas, and open woodlands. It is a perennial plant, its life cycle characterised by a period of active growth in spring and summer, followed by a period of dormancy in winter.
The cultivar 'Summer Beauty' was introduced by Dr Joe Halinar from Oregon. It is distinguished by its compact habit and forms a flowering clump 40 to 55 cm tall with a spread of 30 to 40 cm at maturity in open ground. The plant produces offsets, enabling the clump to expand gradually over the years. The inflorescences of the 'Summer Beauty' are globular umbels of 5 cm in diameter, formed of 25 to 30 very small bell-shaped flowers of a purplish colour. These inflorescences appear from July to August, sometimes until September depending on the climate. They are borne on sturdy, upright stems. The melliferous and nectariferous flowers attract various pollinators including bees and butterflies. The foliage consists of dark green, glossy, strap-shaped leaves measuring about 30 cm long, emitting an onion scent when crushed. These leaves form a dense and attractive clump that remains decorative throughout the growing season, then dries as the bulb enters dormancy.
Planted en masse along a pathway or in small groups of 3 to 5 in a perennial bed, or even among vegetable plants, this 'Summer Beauty' onion does not go unnoticed. It pairs well with catmints and lavandins, but also with woodland sages. Its flowers will add structure to a contemporary garden with various contrasting geometric forms. It can also be combined with dwarf boxwood and even with creeping conifers.
Allium senescens subsp. montanum Summer Beauty in pictures
Plant habit
Flowering
Foliage
Botanical data
Allium
senescens subsp. montanum
Summer Beauty
Amaryllidaceae
German garlic, Mountain garlic, Pink lily leek, Ornamental Onion
Allium lusitanicum Summer Beauty, Allium angulosum 'Summer Beauty', Allium tanguticum 'Summer Beauty'
Cultivar or hybrid
Planting and care
The Allium 'Summer Beauty' should be planted from autumn at a depth of 8-10 cm in cool to dry, but well-drained, even stony or sandy soil in a warm position, spaced 15 cm apart. In warm climates, shade is well tolerated during the hottest hours of the day. Add sand when planting to ensure good drainage for the bulb and avoid overly heavy soil. If water does not stagnate, it can withstand very harsh winters. Container cultivation is possible; use a light substrate comprising 1/3 sand, 1/3 compost, and 1/3 perlite.
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).
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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.