Agastache foeniculum (anisata)
Agastache foeniculum (anisata)
Agastache foeniculum (anisata)
Agastache foeniculum (anisata)
Agastache foeniculum
Anise hyssop
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Description
Agastache foeniculum, also known as anise hyssop, fennel hyssop, aniseed hyssop and giant hyssop, is a stunning perennial of medium hardiness, often grown as an annual. It is a tall and beautiful fragrant plant with aromatic leaves and flowers. In summer, it produces long magenta spikes that are particularly attractive to bees. Perfect for the wilder areas of the garden, it can also be used as a culinary herb. This agastache can self-seed where it thrives.
Agastache foeniculum belongs to the Lamiaceae family. It is native to North America. It readily hybridises with other agastache species and self-seeds abundantly. It ranges from 50cm (20in) to 1.2m (4ft) in height, depending on the soil and climate. It forms a clump of herbaceous growth with an upright habit. Its angular stems are adorned with grey-green leaves on the upper side and a whiter tone on the underside. They are thin and elongated, 8cm (3in) long, with coarsely toothed margins. They emit a scent of aniseed mixed with mint. It is primarily cultivated for the beauty and nectar-rich nature of its long flower spikes that appear from July to October. The small bilabiate tubular flowers are clustered in dense terminal spikes measuring 4 to 8cm (2 to 3in). They exude a powerful aniseed fragrance. Delicate notes of aniseed can be found in the honey produced by bees that pollinate these flowers. The wild variety has blue petals, mauve calyxes, and bracts. The above-ground vegetation is deciduous. It emerges in spring and disappears in winter.
Agastache foeniculum is a very robust plant that is easy to grow in any well-drained soil, even limestone and clay. Its roots can withstand short frosts of around -7°C (19.4°F). It works well in natural or countryside-style flower beds. It can also grow in vegetable gardens, alongside thyme, summer savory, chervil, or basil. Dried flowers can be preserved for a long time in bouquets. The leaves are traditionally used in cooking as a substitute for aniseed, or in herbal teas after drying.
Agastache foeniculum (anisata) in pictures
Flowering
Foliage
Plant habit
Botanical data
Agastache
foeniculum
Lamiaceae
Anise hyssop
Agastache anisata
North America
Planting and care
Transplant the plants outdoors when all risk of frost has passed. Space the plants 30 to 40cm (12 to 16in) apart. Plant them in ordinary, well-drained soil, in a sunny location, or even partially shaded in hot regions. It does not tolerate excessively dry soil in summer, nor excessively wet soil in winter.
Anise hyssop is a generally hardy and undemanding plant. It adapts to most soils, even limestone and clay, provided they are properly drained. In heavy soil, incorporate compost, gravel, or coarse sand into the garden soil. It prefers a sunny exposure or, at most, partial shade. It can self-seed abundantly and become invasive. It can tolerate moderate frosts (-5 to -7 °C (23 to 19.4°F)). Protect the stumps with a thick mulch in case of severe frosts. Protect from slugs and snails.
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).
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.
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