 | Iris
'Licorice Stick' |
| Herbaceous Flowers, Spikey | Dark blue flowers (Summer), Medium Green foliage |
 | Iris sibirica
'Tropic Night' |
| Herbaceous Flowers, Spikey | Dark blue flowers (Summer), Medium Green foliage |
 | Iris
'Blue Rhythm' |
| Herbaceous Flowers, Spikey | Dark blue flowers (Summer), Medium Green foliage |
 | Iris
'Silver Beauty' |
| Herbaceous Flowers, Spikey | Dark blue flowers (Summer), Medium Green foliage |
 | Iris
'Arctic Fancy' |
| Herbaceous Flowers, Spikey | Dark blue flowers (Summer), Medium Green foliage |
 | Iris
'Katie-koo' |
| Herbaceous Flowers, Spikey | Dark blue flowers (Summer), Medium Green foliage |
 | Nemesia denticulata
Nemesia |
| Herbaceous Flowers, Ground cover, Container-friendly, Annual, Spreading | Dark blue flowers (Summer), Medium Green foliage |
 | Salvia patens
'Chilcombe'
Gentian Sage |
| Herbaceous Flowers, Container-friendly, Spreading | Dark blue flowers (Summer), Medium Green foliage |
 | Vinca minor
'Bowles Variety'
Periwinkle |
| Herbaceous Flowers, Ground cover, Container-friendly, Spreading | Dark blue flowers (Summer early), Medium Green foliage |
 | Agastache
'Black Adder'
Giant Hyssop |
| Herbaceous Flowers, Ground cover, Annual, Spreading | Dark blue flowers (Summer late), Medium Green foliage |