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Hosta 'Blue Mammoth' (sieboldiana) (Plantain lily 'Blue Mammoth' )
1 hour care
per year
per year
1m
Max height
Max height
1.5m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
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.
Hosta 'Blue Mammoth' (sieboldiana) is: Deciduous
Habit
Clump-forming
Flower
White, Pale-lavender in Summer
Foliage
Grey, Blue in Spring; Grey, Blue in Summer; Blue, Grey in Autumn
How to care
Watch out for
Specific pests
Slugs , Snails , Vine weevil Slugs , Snails , Vine weevil
General care
Pruning
Remove dead foliage at the end of the growing season.
Propagation methods
Division
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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)
Companion plants
We do not currently have companion plants added for this plant.
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; Blue, Grey in Autumn
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
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: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Clay, Loamy | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Neutral | Tell us... |
| Light: | Partial Shade, Full Shade | Tell us... |
| Aspect: | North, East, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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