Perennial Cornflower Collection
Perennial Cornflower Collection
Centaurea montana sp., Alba, Purple Heart
Perennial Cornflower, Mountain Cornflower, Great Blue-bottle, Mountain Bluet, Mountain Centaury
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This plant carries a 12 months recovery warranty
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Description
Discover this Collection of Perennial Cornflowers (Centaurea montana): three varieties in assorted colours to add interest to flower beds, borders and rockeries in the heart of spring. The reputation of the Cornflower is well deserved: it grows well in all conditions, and is hardy almost everywhere. The three varieties in our selection are no exception to the rule. These perennials will easily find a perfect spot in your garden. You can also use them as cut flowers to make bouquets!
The collection includes:
1 Centaurea montana 'Coerulea': deep blue flowers with purplish-blue hearts
1 Centaurea montana 'Alba': with pure white flowers
1 Centaurea montana 'Purple Heart': two-coloured, white with a purple heart
Native to mountain areas, these cornflowers are ideal perennials to create cottage garden scenes, mixed with scabious and blue or white Peach-leaved Bellflowers, for example. They flower between late April and early June, for a period of 2 to 3 months, attracting bees and many butterflies. Making excellent cut flowers, they also take a special place in a kitchen garden. Use 5 plants per m², plant in early spring or early autumn in well-loosened soil, free of “weeds”.
A rhizomatous perennial plant, the Perennial cornflower can theoretically spread without limits, which makes it valuable to add volume to borders, flower beds and rock gardens. Its floral stems rise 50 cm from the ground on average, with flower heads measuring 4-5 cm in diameter. Its pretty green, velvety leaves disappear in winter.
Labelled separately
Flowering
Foliage
Plant habit
Botanical data
Centaurea
montana
sp., Alba, Purple Heart
Asteraceae
Perennial Cornflower, Mountain Cornflower, Great Blue-bottle, Mountain Bluet, Mountain Centaury
Central Europe
Planting and care
Plant Centaurea montana in ordinary, even poor or lime-rich, but well-drained soil, in the sun or in partial shade. It tolerates clayey and slightly humid soils, especially if they are a little stony. In case of summer drought, the plant will simply disappear until rain returns. Water copiously when planting and maintain regular watering for the first 8 weeks. After flowering, prune the flower stalks to the ground, this can encourage new flowers to appear at the end of summer.
Perennial Cornflower is susceptible to powdery mildew in summer. As soon as the foliage is affected (it becomes covered in "white" powder), after the first flowering, cut back the plant close to the ground. Water regularly, and new foliage and a second flowering will soon develop.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
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