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close windowPlant list: Indigo plants

Use in a similar way to blue – to blur the gardens shape, and together with blue and violet for a lovely soft colour display.

Centurea montana, Knapweed
 Latin name:Centurea montana
 Common name:Knapweed
 Type of plant:Perennial
 Hardiness:Hardy
 Flower colour:Indigo
 Leaf colour:Mid-green
 Height and spread:50cm x 60cm (1.5ft x 2ft)
 Description:
A spreading perennial that can look a little untidy, with flower spikes that don’t look strong enough for the job. The star shaped flowers which appear above the foliage however, are very fetching. Also available in pink and white. Prefers full sun.


Muscari armeniacum, Grape hyacinth
 Latin name:Muscari armeniacum
 Common name:Grape hyacinth
 Type of plant:Bulb
 Hardiness:Hardy
 Flower colour:Indigo
 Leaf colour:Mid-green
 Height and spread:15cm to 20cm x 8cm to 10cm (6in to 8in x 3.5in to 4in)
 Description:
Above the thin, arching leaves, flower spikes ride, each topped with a dense cluster of small flowers that look a bit like a mini-hyacinth. Needs sun and well drained soil but once established can go a bit rampant.


Eryngium x tripartitum, Eryngium
 Latin name:Eryngium x tripartitum
 Common name:Eryngium
 Type of plant:Perennial
 Hardiness:Hardy
 Flower colour:Blue
 Leaf colour:Grey-green
 Height and spread:1m to 1.2m x 50cm (3ft to 4ft x 2ft)
 Description:
A clump-forming perennial with wiry stems that branch. At the end of the branches are the conical thistle-like flowers, which can be dried. Prefers full sun.


Iris reticulata, Iris
 Latin name:Iris reticulata
 Common name:Iris
 Type of plant:Bulb
 Hardiness:Hardy
 Flower colour:Indigo
 Leaf colour:Mid-green
 Height and spread:10cm to 15cm x 4cm to 6cm (4in to 6in x 1.5in to 2.5in)
 Description:
A very delicate and beautiful iris which bears a single, elegant, long tubed flower that has a yellow marking on each ‘petal’. The leaves are narrow, and increase in width with age. Prefers sunny spot.


Anchusa azurea 'Loddon Royalist', Anchusa
 Latin name:Anchusa azurea 'Loddon Royalist'
 Common name:Anchusa
 Type of plant:Perennial
 Hardiness:Hardy
 Flower colour:Indigo
 Leaf colour:Bright green
 Height and spread:1.2m x 60cm (4m x 2ft)
 Description:
An upright perennial with most of the hairy, narrow oval leaves at ground level. Above these rise the single, flat flowers on branching flowering spikes. Needs sun and well drained soil, and doesn’t like to get its feet too wet in winter.



Related plant lists:


Red plants
Orange plants
Yellow plants
Green plants

Blue plants
Indigo plants
Violet plants