 | Hosta halcyon
Plantain Lily | Herbaceous Flowers, Ground cover, Container-friendly, Rounded - Clump | White flowers (Summer early) | Grey-Blue foliage |
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 | Allium karataviense | Herbaceous Flowers, Spreading | White flowers (Summer early) | Grey-Blue foliage |
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 | Eryngium giganteum | Herbaceous Flowers, Container-friendly, Spikey | Blue-silver flowers (Summer) | Grey-Blue foliage |
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 | Eryngium x oliverianum
Sea Holly | Herbaceous Flowers, Container-friendly, Spikey | Blue-silver flowers (Summer) | Grey-Blue foliage |
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 | Eryngium bougatti
'Picos Blue' | Herbaceous Flowers, Container-friendly, Spikey | Blue-silver flowers (Summer) | Grey-Blue foliage |
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 | Hosta
'Hapsden Blue' | Herbaceous Flowers, Container-friendly, Rounded - Clump | Blue flowers (Summer) | Grey-Blue foliage |
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 | Hosta seiboldiana
'Francis Williams'
Plantain Lily | Herbaceous Flowers, Ground cover, Container-friendly, Rounded - Clump | Blue flowers (Summer) | Grey-Blue foliage |
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 | Eryngium exemum | Herbaceous Flowers, Container-friendly, Spikey | Blue flowers (Summer) | Grey-Blue foliage |
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 | Echinops ritro
'Taplow Blue'
Globe Thistle | Herbaceous Flowers, Spikey | Blue flowers (Summer) | Grey-Blue foliage |
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