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Aconitum Stainless Steel

Aconitum Stainless Steel
Monkshood

4,8/5
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They are looking very good.

Christiane, 13/04/2021

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This plant carries a 12 months recovery warranty

More information

Graden Merit Value-for-money
Perennial, very hardy and melliferous, with beautiful clusters of steel blue flowers in the helmet of Jupiter, reaching a height of 90cm (35in), ideal for flower beds.
Flower size
3 cm
Height at maturity
90 cm
Spread at maturity
50 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil, Damp soil
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Recommended planting time March to May, September to November
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Flowering time June to August
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Description

The 'Stainless Steel' Aconitum is a beautiful hardy herbaceous perennial that flowers from June to August in long clusters of blue flowers shaped like a helmet, hence its nickname 'Jupiter's Helmet'.

Little known, this Aconite reaches a height of 90 cm and produces deciduous, alternate, finely cut grey-green leaves, 5 to 10 cm (2 to 4in) long. The upright stems bear clusters of helmet-shaped flowers, melliferous, steel blue, 40 cm (16in) long. These flowers offer a beautiful contrast between the steel blue hood veined with ultramarine blue and the nearly black stamens. Please note that all parts of the plant are toxic if ingested (anesthetic), so do not plant it near vegetables or play areas for children.

The 'Stainless Steel' Aconitum grows in deep, moist, humus-rich and well-drained soil, in a sunny or partially shaded location. It tolerates limestone and the addition of compost at planting is recommended. It requires freshness in summer and no stagnant moisture in winter.

The 'Stainless Steel' Aconitum takes a while to establish, but once in place, it forms a superb clump one meter wide. It is perfect in a flowerbed for cutting flowers, along with Echinaceas, Heleniums, or Anemones that flower in autumn.

Tips: Wait until the 5th year to divide them.

Aconitum Stainless Steel in pictures

Aconitum Stainless Steel (Foliage) Foliage

Flowering

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

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 90 cm
Spread at maturity 50 cm
Growth rate normal

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Aconitum

Cultivar

Stainless Steel

Family

Ranunculaceae

Other common names

Monkshood

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Planting and care

The 'Stainless Steel' young plant Aconitum should be planted in spring or autumn with a spacing of 50cm (20in), and the stems should not be buried too deeply in order to avoid fungal diseases. Stake and water during dry weather. After 5 years of growth, divide the clump in autumn. Mulch in summer to retain moisture.

Planting period

Recommended planting time March to May, September to November

Intended location

Suitable for Meadow, Woodland edge
Type of use Edge of border
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 3 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Calcareous
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, Damp soil

Care

Pruning No pruning necessary
Disease resistance Good
Overwinter Can be left in the ground
4,8/5
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