| Eryngium planum
'Blackappe
Eryngium | Dark blue flowers (Summer), Grey foliage, Herbaceous Flowers |
Ref:1830
|
| Nepeta racemosa
'Walkers Low'
Catnip, Nepeta | Dark blue flowers (Summer early, scented), Grey foliage, Herbaceous Flowers, Herbs, Ground cover, Culinary |
Ref:2044
|
 | Salvia
'Khaleghi'
Sage | Dark blue flowers (Summer late), Medium Green foliage, Herbaceous Flowers |
Ref:2779
|
 | Galega orientalis
Goat's Rue, Galega | Dark blue flowers (Summer), Medium Green foliage, Herbaceous Flowers |
Ref:2785
|
| Iris sibirica
'Caesar's Brother' | Dark blue flowers (Summer), Medium Green foliage, Herbaceous Flowers |
Ref:2827
|
| Iris sibirica
'Navy Brass'
Siberian Iris | Dark blue flowers (Summer), Medium Green foliage, Herbaceous Flowers |
Ref:2860
|
| Salvia pratensis
'Lapis Lazuli' | Dark blue flowers (Summer late), Medium Green foliage, Herbaceous Flowers |
Ref:2867
|
 | Iris sibirica
Siberian Iris | Dark blue flowers (Summer), Medium Green foliage, Herbaceous Flowers |
Ref:114
|
 | Agastache
'Black Adder'
Giant Hyssop | Dark blue flowers (Summer late), Medium Green foliage, Herbaceous Flowers, Ground cover, Annual |
Ref:2274
|
 | Muscari
'Early Giant' | Dark blue flowers (Spring), Medium Green foliage, Herbaceous Flowers |
Ref:2529
|