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Aconitum fischeri

Aconitum fischeri
Monkshood

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This perennial aconite, native to Korea and Siberia, captivates with its large helmet-shaped flowers in a barely purplish blue, arranged on 70 cm (28in) floral stems that do not require staking. The plant blooms from August to October, above a beautiful deeply-cut foliage in a very beautiful dark green luster. Hardy, it is grown in partial shade, sheltered from the intense sun, in deep, moist soil, rich in organic matter, well-drained. All parts of the plant are highly toxic.
Flower size
3 cm
Height at maturity
70 cm
Spread at maturity
45 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time February to March
Recommended planting time March to April, October to November
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Flowering time August to October
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Description

The Aconitum fischeri, also known as the Fischer's Monkshood, is a botanical species native to Siberia and Korea, considered to be very similar to Aconitum carmichaelii. It is a highly ornamental perennial plant, both for its generous and prolonged flowering and its beautifully cut foliage, with a glossy dark green color. This plant thrives in cool and rich, but well-drained soils, and is a very hardy shade plant, perfect for adding color and verticality to perennial beds. Its large helmet-shaped flowers, barely violet-blue, cluster on floral stems that usually do not require staking.

Fischer's Monkshood is a herbaceous perennial plant in the buttercup family, just like its cousin, the Delphinium. It is a wild plant native to temperate Asia and northern Asia: Korea, eastern Siberia, and northern China. In the wild, it can be found in forests, meadows, and grassy slopes, up to an altitude of 800 m (2625ft). This plant grows from a fleshy tuberous root, from which a erect tuft of slightly hairy stems emerges in spring, adorned with tough, palmately-lobed leaves with narrow lobes, measuring 8 to 12 cm (3 to 5in) long and 12 to 15 cm (5 to 6in) wide. The upper side of the leaves is a glossy dark green, while the underside is slightly pubescent. The flowering period extends from August to September-October. At the tips of the stems, helmet-shaped flower spikes bloom, with a deep blue color, slightly purplish, filtering the light beautifully. The flowering plant reaches a height of about 70 cm (28in), with a width of 45 cm (18in). At the end of the season, the above-ground vegetation dries up and disappears.

Aconites have a bad reputation due to their legendary toxicity. This is unfortunate because they have their place in every garden, as long as they have a humus-rich soil that doesn't dry out in summer. They are robust and very hardy, and their foliage is among the most beautiful among perennial plants. They are perfect for the back of borders, along with foxgloves and bugbanes, creating enchanting shaded scenes in summer. They can be planted among bushes, sheltered from the wind that sometimes bends their stems, along with Japanese anemones that will take over their flowering. They also look stunning in front of the purple foliage of Physocarpus, for example. They are good perennials for bright and slightly damp woodland areas. Lastly, their flowers are magnificent in bouquets, alongside roses and asters, for example.

Flowering

Flower colour blue
Flowering time August to October
Inflorescence Cluster
Flower size 3 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Plant habit

Height at maturity 70 cm
Spread at maturity 45 cm
Growth rate normal

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Aconitum

Species

fischeri

Family

Ranunculaceae

Other common names

Monkshood

Origin

China

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Planting and care

Aconites thrive in light woodland, in a sunny but not scorching exposure (avoid sun between 12 pm and 4 pm), sheltered from strong winds. Fischer's Aconite will appreciate a deep, moist but well-drained soil, rich in humus and compost. It prefers shady locations and tolerates the sun, but the soil must remain constantly moist and never dry out. For this reason, it is recommended to use mulch in summer to maintain some freshness. The soil should be enriched with compost and turf, which will give it a slight acidity. Stake the taller flower spikes to prevent them from bending. Please note, aconite is toxic: wash your hands after picking or touching it.

Planting period

Best planting time February to March
Recommended planting time March to April, October to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Back of border
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, humus-bearing, deep, well-drained

Care

Pruning instructions Prune the dry vegetation at the end of winter.
Pruning Pruning recommended once a year
Pruning time March
Disease resistance Good
Overwinter Can be left in the ground

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