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Alcea rosea Pleniflora Rouge - Hollyhock

Alcea rosea Pleniflora Rouge
Hollyhock

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This sumptuous hollyhock raises tall floral spikes where double pompom flowers in a rich carmine red succeed each other throughout summer. This perennial plant, often cultivated as a biennial, is wonderful at the back of borders or to carpet the walls of an enclosed garden. It tolerates poor and rocky soils, drought, and prefers warm and sheltered positions.
Flower size
8 cm
Height at maturity
2 m
Spread at maturity
30 cm
Exposure
Sun
Hardiness
Hardy down to -18°C
Soil moisture
Dry soil, Moist soil
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Best planting time March, September
Recommended planting time March to May, September to October
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Flowering time July to September
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Description

The Alcea rosea 'Pleniflora Rouge' is a splendid variety of hollyhock with its immense floral spikes adorned with somewhat theatrical, very double pompom flowers in a rich carmine red colour. They bloom throughout the summer and are arranged on stems often exceeding 2m (7ft) in height. This countryside perennial plant, often cultivated as a biennial, is emblematic of English cottage gardens and is wonderful at the back of borders or for covering walls. It tolerates poor, rocky soils, withstands drought, and prefers warm, sheltered locations.

The hollyhock is also known by its Latin name Althaea rosea. Belonging to the Malvaceae family, it is native to Asia Minor and often naturalized in slightly wild gardens, fallow lands, and mounds of soil.

The Pleniflora hollyhock is a variety of wild plant from which with fully double flowers derive. It is an upright plant, generally unbranched, which can reach heights of 2m (7ft) to 2.50m (8ft). In the first year, it forms a rosette of rounded leaves with 5 or 7 lobes, from which a robust, slightly leafy floral stem emerges in the second year, and grows very rapidly. The spike inflorescences are covered with large buds that open in a staggered manner from June-July to August-September, from the bottom to the top, into large ephemeral double corolla flowers, 8 to 10 cm (3 to 4in) in diameter, with a fine crepe-like texture that allows light to pass through. They display a rich colour, and their undulations reveal shades of purple, pink, or violet. 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, including at the foot of walls, in poor and rocky soils, in wall crevices etc.

Commonly found in abandoned gardens or fallow lands in the countryside, the hollyhock is often cultivated at the back of borders or against a wall that protects it from strong winds. The carmine pompoms of this variety can be combined with pastel shades (white, pastel pink, or candy) or darker shades (black, purple, violet), whether single or double. Hollyhocks pair well with yarrow, bugloss, stachys, mulleins (verbascums), agastaches, against a wall, or leaning against a conifer hedge. This plant is said to tolerate juglone, a substance secreted by walnut roots: if there is sufficient light, this plant could be placed at the base of the tree. The hollyhock is an edible plant, with the floral buds being consumed raw in salads and the young leaves either raw or cooked.

The hollyhock is both ornamental and medicinal. Its seeds are used to extract an oil with drying properties. Rich in mucilage, it has soothing, emollient, expectorant, laxative, and appetizing properties, although less pronounced than those of its cousin, the Marshmallow (Althea officinalis), used by herbalists.

 

Alcea rosea Pleniflora Rouge - Hollyhock in pictures

Alcea rosea Pleniflora Rouge - Hollyhock (Flowering) Flowering

Flowering

Flower colour red
Flowering time July to September
Inflorescence Spike
Flower size 8 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 2 m
Spread at maturity 30 cm
Growth rate fast

Botanical data

Genus

Alcea

Species

rosea

Cultivar

Pleniflora Rouge

Family

Malvaceae

Other common names

Hollyhock

Origin

Cultivar or hybrid

Product reference897891

Other Alcea rosea - Hollyhocks

Available to order
From €3.90 7/8 cm pot
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Planting and care

Trémière water flowers appreciate warm, sheltered positions, sunshine, and can tolerate ordinary soil, even clay, limestone, poor or stony soil. Sometimes it is necessary to stake this plant. The young plants with taproots do not appreciate being transplanted when they are too developed. Care must be taken not to break this taproot during handling. The rosea species is resistant to drought and very hardy, but is susceptible to slugs and particularly sensitive to rust in cases of rainy summers or as it ages. It must be protected from excess moisture and treated preventively using a fungicidal.

In October, remove the faded flower stalks. New foliage will appear.

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Planting period

Best planting time March, September
Recommended planting time March to May, September to October

Intended location

Suitable for Meadow
Type of use Back of border, Slope
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Beginner
Planting density 9 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, Draining and deep

Care

Pruning instructions In October, remove the faded flower stalks.
Pruning Pruning recommended once a year
Pruning time October
Disease resistance Average
Overwinter Can be left in the ground

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