

Hibiscus syriacus Blanco - Rose of Sharon


Hibiscus syriacus Blanco - Rose of Sharon


Hibiscus syriacus Blanco - Rose of Sharon
Hibiscus syriacus Blanco - Rose of Sharon
Hibiscus x syriacus Blanco
Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus
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This plant carries a 24 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.

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Description
Hibiscus syriacus Hibisa® 'Blanco' is a variety of althea from the excellent Hibisa® series, combining numerous qualities: it produces extra-large, highly contrasted flowers from summer to autumn, and the bush is easy to grow in the garden or in a pot. A spectacular, hardy, drought-tolerant variety!
Belonging to the Malvaceae family, Hibiscus syriacus, also known as althea or rose of Sharon, originates from the temperate regions of East Asia, particularly China, Korea, and Taiwan, where it grows wild on the edges of forests or along waterways. Introduced to Europe via the Mediterranean basin, it has given rise to numerous cultivars and hybrids. Crossed with Hibiscus paramutabilis, this species produces plants with exceptionally large flowers.
The Hibisa® Blanco cultivar belongs to the Hibisa® series, developed for its very large flowers and versatility. This deciduous bush can reach 2.5 m in height and 1.5 m in width at maturity when planted in the ground, and around 1.5 m in a pot. Its large, single white flowers with a carmine-red centre, which emerge from the axil of the leaves, measure between 16 and 20 cm. They bloom continuously from July to October. The foliage of the Hibiscus in the Hibisa® series is unusual and quite decorative. The leaves are arranged alternately on the stems; they are generally single but deeply lobed and finely toothed, sometimes almost ruffled. Each leaf consists of 3 to 5 deep lobes, with distinctly wavy or crinkled margins, giving a palmate appearance to the foliage. The leaves vary in size from 5 to 12 cm in length and 4 to 10 cm in width, with a slightly leathery texture and a colour ranging from bright green to dark green. The foliage is deciduous, falling in autumn and reappearing in spring, often late in the season, as is typical of all Hibiscus syriacus. A tap root system anchors the bush firmly and provides good drought resistance. The greyish stems, marked with lenticels, enhance its rustic charm.
Hibiscus Hibisa® Blanco is ideal for structuring a sunny flower bed, enriching a country hedge, or adding volume to a terrace. To create a dynamic and contrasting composition, pair it with a salvia ‘Amistad violet’ with very dark floral spikes and a Phormium ‘Sundowner’ with bronze-pink foliage. To enrich the floral palette, plant an Echinacea purpurea ‘White Meditation’ nearby. This combination will create an interesting scene in a contemporary or Mediterranean-style garden.
Hibiscus syriacus Blanco - Rose of Sharon in pictures




Plant habit
Flowering
Foliage
Botanical data
Hibiscus
x syriacus
Blanco
Malvaceae
Common Hibiscus, Rose of Sharon, Syrian ketmia, St Joseph's rod, Garden Hibiscus
Cultivar or hybrid
Planting and care
Plant Hibiscus syriacus Hibisa Blanco in early spring or early autumn. Container planting is possible all year round. Choose a sunny spot, as full light is essential for generous flowering. Plant it in deep, rich, well-drained soil with a neutral to slightly alkaline pH; in overly acidic or heavy soil, add organic-lime supplement or well-rotted compost to improve the structure. In the ground, dig a hole twice as wide as the root ball and position the young plant. Water thoroughly after planting and at regular intervals during the first few months to help it establish well. Once established, hibiscus tolerates drought well but will appreciate regular watering during extreme heat. Organic mulch can be added around the base to reduce evaporation and naturally enrich the soil.
In containers, use a pot at least 40 cm in diameter with good drainage at the bottom and a substrate made of horticultural compost, compost, and coarse sand. Potted hibiscus requires regular watering from spring to late summer.
Hibiscus can be susceptible to powdery mildew, and black aphids and mealybugs may attack it.
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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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.