Acorus gramineus Licorice
Acorus gramineus Licorice
Acorus gramineus Licorice
Acorus gramineus Licorice
Acorus gramineus Licorice
Grassleaf sweetflag, Japanese rush
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Description
Acorus gramineus 'Licorice' is a variety of Japanese Sweet Flag that is particularly fragrant, used in Asian cuisine or to flavour all kinds of drinks and desserts. This not very hardy perennial plant, resembling a grass, forms a clump of fine, shiny leaves of a bright green colour that is full of character. The foliage has a surprising anise scent with a hint of licorice, while the root can be used as a substitute for ginger. An ornamental, culinary, and medicinal plant, ideal for decorating small ponds, water edges, waterfalls, and streams!
Acorus gramineus 'Licorice' is a plant of the Acoraceae family. Its wild ancestor is native to Japan, Korea, and eastern Asia. From the weakly creeping stump emerge leaves resembling those of the iris, but narrower, leathery, thick, shiny, of a beautiful light green colour. It is aromatic when crushed and releases a rather aniseed aroma with a touch of liquorice. The rhizomes, used in traditional Japanese medicine, are also fragrant: their smell reminds more clearly of liquorice. This slow-growing perennial plant is not invasive. At maturity, it will form a clump of 30-40cm (12-16in) in all directions. The greenish flowers are almost invisible, they are gathered in a small short spadix and appear at the beginning of summer. The hardiness of this variety is estimated at -8/-10 °C, according to some sources.
This 'Licorice' Japanese Sweet Flag forms a large clump in a few years, which goes perfectly with Japanese irises, Asian primroses or willows on the edges of a pond. Similarly, you can also plant it in a trough or in a garden with particularly heavy and moist soil.
We have planted a variegated variety of Acorus gramineus in one of our ponds where its semi-evergreen foliage is very useful, as it must be admitted that most bankside plants disappear in winter. Acorus gramineus is known to be not very hardy, but it has been outside for over 20 years and does not suffer from the cold. In regions with cold winters it will be preferable to overwinter it in a cold greenhouse or in a well-ventilated and bright location, protected from frost, while keeping the soil always moist.
Acorus gramineus Licorice in pictures
Flowering
Foliage
Plant habit
Botanical data
Acorus
gramineus
Licorice
Araceae
Grassleaf sweetflag, Japanese rush
Cultivar or hybrid
Planting and care
The 'Licorice' Acorus gramineus prefers to be planted in spring, in a partially shaded or sunny, but not scorching, position. Install it in crevices of dripping rocks or on the banks of a pond, in heavy, moist, or even marshy soil. In cold regions, place the plant, with a clod of earth, in a large pot or some sort of container. Install it in a cold greenhouse or a well-ventilated, bright place protected from frost. The soil must be kept constantly moist.
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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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.