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Hosta Krossa Regal

Hosta nigrescens Krossa Regal
Black Plantain Lily, Funkia

5,0/5
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in vegetative dormancy, therefore without leaf, root system in perfect health

jean-françois, 06/12/2022

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This plant carries a 12 months recovery warranty

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With its elegant upright foliage, strongly veined in a bluish-grey colour, the 'Krossa Regal' Hosta is also imposing in size with its floral stems.
Height at maturity
1 m
Spread at maturity
50 cm
Exposure
Partial shade, Shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Recommended planting time February to April, September to November
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Flowering time August to September
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Description

Featuring an elegant upright foliage, strongly veined in a blue-grey colour, the 'Hosta 'Krossa Regal' is also imposing due to the size of its flower stalks. It is a very tall variety, with a beautiful upright, lanceolate foliage with 12 veins, in a blue-grey colour. It forms a clump of 1m (3.3 ft) in height and 40-50cm (15.7 - 19.7 in) in diameter.

 

In summer, during the months of August and September, pretty flowers appear in the form of small trumpets in shades of pink-purple. Standing at over 1.20m (3.3 ft) in height, the flower stalks, very slender, stand out remarkably well against the foliage and create a strong visual effect.

This perennial is not very demanding, it can be planted in large pots or in the back of flower beds... The hosta simply dislikes excessive drought. To be combined with other Hostas for beautiful visual effects or with Equisetum (horsetails) and Carex elata 'Aurea' to create a strong visual impact.

Hosta Krossa Regal in pictures

Hosta Krossa Regal (Flowering) Flowering
Hosta Krossa Regal (Foliage) Foliage
Hosta Krossa Regal (Plant habit) Plant habit

Flowering

Flower colour mauve
Flowering time August to September
Inflorescence Cluster

Foliage

Foliage persistence Deciduous
Foliage colour blue

Plant habit

Height at maturity 1 m
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Hosta

Species

nigrescens

Cultivar

Krossa Regal

Family

Liliaceae - Hostaceae

Other common names

Black Plantain Lily, Funkia

Origin

Cultivar or hybrid

Product reference83202

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Planting and care

Hostas are planted in spring or autumn. Hostas prefer a deep, rich, humus-bearing, loose soil, preferably neutral to acidic (at least low in limestone), moist to wet throughout the year. Plant them in partial or dappled shade and sheltered from strong winds.


Prepare a planting hole of 20 cm (7.9 in) x 20 cm (7.9 in) x 20 cm (7.9 in). If your soil is heavy, mix equal parts of compost with crumbled soil, partially fill the hole, and place your potted plant so that the top of the root ball is covered with 3 cm (1.2 in) of soil. Adding a slow-release fertilizer will nourish your plant during its rooting period without the risk of burning. Make sure to position the base well above ground level. Firm the soil and water generously to eliminate air pockets. If the weather is dry, regular watering for a few weeks will help to establish your plant. Also, water regularly in case of a dry summer.


With their preference for moist areas, slugs and snails never stray far from hostas. Even though blue or variegated hostas often have thicker and tougher foliage, which is less appealing to slugs, these plants still need gastropod protection. Protect your Hostas by surrounding them with ferramol-based pellets, eggshells, coffee grounds, mulch, or any dry, rough natural substance that repels them. Hedgehogs are the best allies of gardeners in the fight against gastropods because, unlike chickens, they do not till the soil and do not attack the tender green shoots of young plants. Finally, a natural way to repel slugs and snails is to have companion plants with a repulsive odour, such as wormwood and garlic.

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Planting period

Recommended planting time February to April, September to November

Intended location

Suitable for Woodland edge, Undergrowth, Pond edge
Type of use Border
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Planting density 3 per m2
Exposure Partial shade, Shade
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, clay

Care

Overwinter Can be left in the ground
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