| Lithodora diffusa
'Star' | Dark blue flowers (Summer), Herbaceous Flowers |
Ref:470
|
| Agapanthus
'Mabel Grey'
African Lily | Non-flowering, Herbaceous Flowers |
Ref:3156
|
 | Agapanthus
'Windsor Grey'
African Lily | Dark blue flowers (Summer), Herbaceous Flowers |
Ref:3163
|
 | Cerinthe major
Purpurascens
Honeywort | Dark blue flowers (Summer), Blue foliage, Herbaceous Flowers, Ground cover, Annual |
Ref:2027
|
| Hosta
'Hapsden Blue' | Dark blue flowers (Summer), Blue foliage, Herbaceous Flowers |
Ref:1422
|
 | Ceratostigma plumnaginoides
Hardy Plumbago, Ceratostigma | Dark blue flowers (Summer late), Dark Green foliage, Herbaceous Flowers, Ground cover |
Ref:353
|
 | Aster novi - belgii
'Ada Ballard'
Aster Daisy | Dark blue flowers (Summer late), Dark Green foliage, Herbaceous Flowers |
Ref:2968
|
 | Echinops setifer
Echinops | Dark blue flowers (Summer late), Dark Green foliage, Herbaceous Flowers |
Ref:3136
|
| Campanula lactiflora
'Prichard's Variety'
Campanula, Bellflower | Dark blue flowers (Summer early), Dark Green foliage, Herbaceous Flowers, Ground cover |
Ref:2245
|
| Hosta fortunei
'Aurea'
Plantain Lily | Dark blue flowers (Summer), Golden foliage, Herbaceous Flowers, Ground cover |
Ref:1079
|