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Centaurea cyanus 'Blue Boy' (Cornflower 'Blue Boy')
1 hour care
per year
per year
0.9m
Max height
Max height
0.6m
Max spread
Max spread
1-2 years
To maturity
To maturity
Plant details
Botanical name
Centaurea cyanus 'Blue Boy'
Other names
Cornflower 'Blue Boy'
Genus
Centaurea Centaurea
Variety or Cultivar
'Blue Boy' _ 'Blue Boy' is an upright annual forming a mound of deep blue double flowers in the summer.
Centaurea cyanus 'Blue Boy' is: Deciduous
Habit
Upright
Flower
Dark-blue in Summer
Foliage
Green in Summer
How to care
Watch out for
Pests
Generally pest free
Powdery mildew Powdery mildew
General care
Pruning
Deadheading helps to prolong the flowering season.
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Where to grow
Centaurea cyanus 'Blue Boy' (Cornflower 'Blue Boy') will reach a height of 0.9m and a spread of 0.6m after 1-2 years.
Suggested uses
Beds and borders, Bees (attract & feed bees), Coastal, Containers, Flower Arranging, Wildflower, Wildlife
Cultivation
Grow in well-drained soil in full sun. Autumn sowing will produce larger, earlier-flowering plants.
Soil type
Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Centaurea cyanus 'Blue Boy'
Other names
Cornflower 'Blue Boy'
Genus
Centaurea Centaurea
Variety or Cultivar
'Blue Boy' _ 'Blue Boy' is an upright annual forming a mound of deep blue double flowers in the summer.
Foliage
Deciduous
Habit
Upright
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Colour
Flower
Dark-blue in Summer
Foliage
Green in Summer
How to care
Watch out for
Pests
Generally pest free
Specific diseases
General care
Pruning
Deadheading helps to prolong the flowering season.
Monthly care advice
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Where to grow
Centaurea cyanus 'Blue Boy' (Cornflower 'Blue Boy') will reach a height of 0.9m and a spread of 0.6m after 1-2 years.
Suggested uses
Beds and borders, Bees (attract & feed bees), Coastal, Containers, Flower Arranging, Wildflower, Wildlife
Cultivation
Grow in well-drained soil in full sun. Autumn sowing will produce larger, earlier-flowering plants.
Soil type
Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 10, Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3, Zone 2
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy, Sandy | Tell us... |
| Soil drainage: | Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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