Alcea rosea 'Simplex'
Alcea rosea 'Simplex'
Alcea rosea 'Simplex'
Alcea rosea 'Simplex'
Alcea rosea Simplex
Rose-trémière, Passe-rose, Passerose, Rose trémière, Rose papale
Young plants received in good condition, quickly repotted, looking forward to seeing the flowering this summer.
fred, 19/10/2025
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Description
The Alcea rosea 'Simplex' is a simple version of the hollyhock, the quintessence of this authentic perennial that wanders so naturally in abandoned gardens. It reaches towards the sky, offering large spikes adorned with single flowers, graceful like those of hibiscus, in a varied palette of shades. This classic variety is timeless, and truly perfect in the background of a border. It thrives in poor, rocky soils, shows tolerance to drought, and prefers warm locations.
The hollyhock 'Simplex' is also known by its Latin name Althaea rosea 'Simplex', and its vernacular names adopt all the accents of our regions: it is called Passe-rose, Rose à bâton, Rose papale or primerose. From the mallow family, it is native to Asia Minor and often naturalised in neglected gardens, fallow fields, and mounds of soil. This 'Simplex' variety is part of an old series, with plants showing various colours and proving to be truly perennial and not biennial. It is an upright, usually unbranched plant that can reach a height of 1.20 to 1.80m (4 to 6ft). It forms a rosette of rounded leaves from which a robust floral spike emerges, with very rapid growth. These spike-like inflorescences are covered with large buds that bloom, staggered from June to August, sometimes even until October, and from bottom to top, into large single flowers (5 to 10 cm (2 to 4in) in diameter) that only last for a day. They display soft or vibrant hues, white, different shades of pink, or light red to dark red, solid or almost bicoloured, and a texture that allows the green reflections of the surrounding vegetation to shine through. Throughout this period, they will attract bees and butterflies to your garden. The flowering gives way to numerous fruits filled with seeds that self-sow in the most unexpected areas, chosen by the plant itself: at the base of walls, in poor, rocky soils, crevices in walls, etc.
The foliage of Alcaea rosea is deciduous. The alternate leaves, 15 cm (6in) long, are pale green. These large leaves are rounded and rough. They are divided into 3 to 7 shallow lobes.
Very common in abandoned gardens or fallow fields in our countryside, the hollyhock is often grown in the background of a border or leaning against a wall that protects it from strong winds. The simple and very bright colours of this variety will allow you to create superb combinations with dwarf buddleias, tall perennials with light foliage (fennel, linaria, Ferula communis, Datisca cannabina, Melianthus major), or with voluptuous grasses like Miscanthus, Panicum, etc. The hollyhock is an edible plant, the flower buds can be consumed raw in salads and the young leaves raw or cooked.
The hollyhock is both ornamental and medicinal. Its seeds yield an oil with drying properties. Rich in mucilage, it has soothing, emollient, expectorant, laxative, and appetising properties.
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Alcea rosea 'Simplex' in pictures
Flowering
Foliage
Plant habit
Botanical data
Alcea
rosea
Simplex
Malvaceae
Rose-trémière, Passe-rose, Passerose, Rose trémière, Rose papale
Cultivar or hybrid
Planting and care
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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