Hosta 'Blue Mammoth' (sieboldiana) (Plantain lily 'Blue Mammoth' )

Botanical name

Hosta 'Blue Mammoth' (sieboldiana)

Other names

Plantain lily 'Blue Mammoth'

Genus

Hosta Hosta

Variety or Cultivar

'Blue Mammoth' _ 'Blue Mammoth' is a large, clump-forming, herbaceous perennial with thick, puckered, broadly oval, grey-blue leaves and tall scapes bearing racemes of funnel-shaped, white to pale lavender flowers in summer.

Foliage

Deciduous

Habit

Clump-forming

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Colour

Flower

White, Pale-lavender in Summer

Foliage

Grey, Blue in Spring; Grey, Blue in Summer; Grey, Blue in Autumn

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How to care

Watch out for

Specific pests

Slugs , Snails , Vine weevil

General care

Pruning

Remove dead foliage at the end of the growing season.

Propagation methods

Division

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Monthly care advice

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Where to grow

Hosta 'Blue Mammoth' (sieboldiana) (Plantain lily 'Blue Mammoth' ) will reach a height of 1m and a spread of 1.5m after 2-5 years.

Suggested uses

City, Cottage/Informal, Beds and borders, Ground Cover, Containers, Underplanting

Cultivation

Prefers slightly acid or neutral, fertile, moist but well-drained soil in partial shade, sheltered from cold, dry winds. Will tolerate full sun if the soil is kept consistently moist. Shallow, chalky soils can cause poor leaf colour. Mulch in spring.

Soil type

Clay, Loamy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Neutral

Light

Partial Shade, Full Shade

Aspect

North, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Hosta 'Blue Mammoth' (sieboldiana) (Plantain lily 'Blue Mammoth' )

Common pest name

Scientific pest name

Hosta virus X

Type

Virus or Viroid

Current status in UK

Present (Limited)

Likelihood to spread in UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Virus affecting Hosta; present in the UK since at least the early 2000’s. Mechanically transmitted so spread can be reduced by good hygiene practices and use of healthy propagating material within the industry.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/