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Greater musk mallow

Malva alcea · Malvaceae

The gardener's calendar

The right move for September

Ideal time to plant greater musk mallow: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Foliage
Deciduous
Flowering
June to September
Adult size
24 to 47 inches tall × 18 to 24 inches wide
Growth
Moderate to fast
Hardiness
Very hardy (-4°F)
Origin
Central and Mediterranean Europe
Soil type
Well-drained, light, low-demand

Care

Watering

Water regularly during spring and summer growth, especially in dry spells. Once established, hollyhock mallow tolerates drought well. In containers, check substrate moisture and water when the soil surface begins to dry.

Sunlight

Place your hollyhock mallow in full sun (at least 6 hours of direct sunlight daily) to encourage generous flowering. South or west-facing exposure is ideal. It tolerates partial shade, but flowering will be less abundant.

Pruning

Cut back faded stems in late fall or early spring to encourage branching. Remove spent flowers regularly to extend the blooming period. Light pruning during the growing season keeps the plant compact and shapely.

Soil

Hollyhock mallow prefers light, well-drained soil that's not too fertile. Avoid overly wet or compacted soil, which promotes root rot. A modest compost application at planting is sufficient; excessive fertilizer reduces flowering.

Fertilizer

It's not demanding and needs only light feeding. Spread well-decomposed compost in spring or apply diluted balanced fertilizer once or twice early in the season. Avoid excess nitrogen, which promotes foliage at the expense of flowers.

Pests and diseases

Generally robust, hollyhock mallow may suffer from powdery mildew in stagnant, humid conditions—improve air circulation. Slugs sometimes target young shoots; use physical barriers if needed. Excess moisture encourages root rot.

Did you know?

Hollyhock mallow was once intensively cultivated across Europe for its reputed medicinal properties. Its pink flowers with a darker center are edible and featured in traditional culinary herb bundles. The name 'alcaea' comes from the Greek 'alkaia,' evoking the healing virtues attributed to it in antiquity.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.