Marrubium supinum
Marrubium supinum
Marrubium supinum
Marrubium supinum
Marrubium supinum
Marrubium supinum
Marrubium supinum
Marrubium supinum
Hoary Horehound, White Horehound
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Description
The Marrubium supinum, also known as the Creeping Horehound, is a plant related to the mint family with remarkable evergreen foliage and a lovely cushion-like habit, wide and regular. It thrives in dry soil, as the aridity accentuates the fluffy and light appearance of its small leaves. Its pinkish-purple flowering is rather discreet in late spring, but it is sought after by bees. Ideal for dry gardens, rockeries, gravel beds, and dry slopes.
The Creeping Horehound is native to the mountains of southern Spain and is more sporadically found in North Africa. In the wild, it is found on rocky soils, uncultivated land, and roadside areas, up to an altitude of 2,500 meters. This species tolerates summer drought and nutrient-poor soils very well. It has a hardiness rating of -12/-15 °C in well-drained soil.
The Marrubium supinum is a woody-based perennial herbaceous plant that forms a tuft of semi-prostrate stems. At maturity, the plant measures approximately 40 cm in height and 50 to 60 cm in width. Its square-shaped stems are fuzzy and slightly woolly. Its foliage persists in winter in regions that are not too cold. The leaves are rounded, dentate at the edges, puckered, very hairy on the upper surface, and slightly less so on the underside. They measure 2 to 6.5 cm in length and 1 to 3 cm in width, with a soft grey-green colour and a lighter margin. The plant usually flowers between May and June. The inflorescence consists of globular whorls, clusters of flowers measuring 2 to 3 cm in diameter, each containing 16 to 26 pinkish-purple flowers. It is a nectariferous and melliferous flowering plant. By early March, the stems become bare. When pruned, the plant vigorously regrows from its stump.
Marrubium supinum is a fascinating perennial for low-maintenance gardens, thanks to its cushion-like appearance and highly ornamental foliage. It is ideal for dry and hot areas, and it is very useful in rockeries, borders, and sun-drenched flower beds where it forms dense and clear masses. It is an excellent companion for Mediterranean plants such as oregano, thyme, lavender, and rockrose. Its light foliage also harmonizes well with the colourful flowering of bushy salvias and the delicacy of gauras.
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Marrubium supinum in pictures
Flowering
Foliage
Plant habit
Botanical data
Marrubium
supinum
Labiatae
Hoary Horehound, White Horehound
Southern Europe
Planting and care
Marrubium supinum thrives in well-drained, rocky or gravelly soils, not too rich, with a slightly alkaline tendency, slightly moist to dry. Plant it in full sun. Planting should be done in spring, from March to May. In the Mediterranean region, it is preferable to plant in October. It can be grown in open ground in all regions that are not too cold in winter, provided that a well-drained soil is provided, which does not retain too much water.
Space the plants 50 cm apart. Dig a hole (three times the volume of the root ball), place the root ball and cover with fine soil. Firmly tamp down and water. Regularly hoe and weed, especially in the beginning.
During cultivation, water moderately, as marrubeium is sensitive to excessive moisture. Once well established, after two or three years of cultivation, it does not require any summer watering, even in Mediterranean areas.
At the end of winter, prune the bare stems to maintain its bushy habit. Remove faded flowers if you want to avoid spontaneous sowing.
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).
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.