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 Plant 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.
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| Latin name: | | Centurea montana |
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| Common name: | | Knapweed |
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| Type of plant: | | Perennial |
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| Hardiness: | | Hardy |
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| Flower colour: | | Indigo |
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| Leaf colour: | | Mid-green |
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| Height and spread: | | 50cm x 60cm (1.5ft x 2ft) |
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| 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.
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| Latin name: | | Muscari armeniacum |
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| Common name: | | Grape hyacinth |
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| Type of plant: | | Bulb |
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| Hardiness: | | Hardy |
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| Flower colour: | | Indigo |
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| Leaf colour: | | Mid-green |
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| Height and spread: | | 15cm to 20cm x 8cm to 10cm (6in to 8in x 3.5in to 4in) |
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| 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.
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| Latin name: | | Eryngium x tripartitum |
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| Common name: | | Eryngium |
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| Type of plant: | | Perennial |
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| Hardiness: | | Hardy |
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| Flower colour: | | Blue |
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| Leaf colour: | | Grey-green |
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| Height and spread: | | 1m to 1.2m x 50cm (3ft to 4ft x 2ft) |
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| 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.
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| Latin name: | | Iris reticulata |
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| Common name: | | Iris |
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| Type of plant: | | Bulb |
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| Hardiness: | | Hardy |
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| Flower colour: | | Indigo |
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| Leaf colour: | | Mid-green |
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| Height and spread: | | 10cm to 15cm x 4cm to 6cm (4in to 6in x 1.5in to 2.5in) |
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| 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.
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| Latin name: | | Anchusa azurea 'Loddon Royalist' |
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| Common name: | | Anchusa |
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| Type of plant: | | Perennial |
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| Hardiness: | | Hardy |
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| Flower colour: | | Indigo |
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| Leaf colour: | | Bright green |
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| Height and spread: | | 1.2m x 60cm (4m x 2ft) |
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| 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.
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