| Caryopteris incana | Dark blue flowers (Summer), Shrub, Ground cover |
Ref:1128
|
 | Cerinthe major
Purpurascens
Honeywort | Dark blue flowers (Summer), Blue foliage, Herbaceous Flowers, Ground cover, Annual |
Ref:2027
|
| Ceanothus concha
Californian Lilac | Dark blue flowers (Summer early, scented), Dark Green foliage, Shrub, Ground cover |
Ref:1269
|
| Campanula lactiflora
'Prichard's Variety'
Campanula, Bellflower | Dark blue flowers (Summer early), Dark Green foliage, Herbaceous Flowers, Ground cover |
Ref:2245
|
 | Ceanothus
'Blue Mound'
Californian Lilac, Ceanothus | Dark blue flowers (Summer), Dark Green foliage, Shrub, Ground cover |
Ref:921
|
 | Ceratostigma plumnaginoides
Hardy Plumbago, Ceratostigma | Dark blue flowers (Summer late), Dark Green foliage, Herbaceous Flowers, Ground cover |
Ref:353
|
 | Ceanothus
'Tilden Park'
Californian Lilac, Ceanothus | Dark blue flowers (Summer, scented), Dark Green foliage, Shrub, Ground cover |
Ref:1725
|
| Hosta fortunei
'Aurea'
Plantain Lily | Dark blue flowers (Summer), Golden foliage, Herbaceous Flowers, Ground cover |
Ref:1079
|
| Nepeta racemosa
'Walkers Low'
Catnip, Nepeta | Dark blue flowers (Summer early, scented), Grey foliage, Herbaceous Flowers, Herbs, Ground cover, Culinary |
Ref:2044
|
 | Agastache
'Black Adder'
Giant Hyssop | Dark blue flowers (Summer late), Medium Green foliage, Herbaceous Flowers, Ground cover, Annual |
Ref:2274
|