Centaurea 'John Coutts'
John Coutts cornflower, Cornflower
Also known as Centaurea hypoleuca 'John Coutts'
- Height × spread
- 0.6m × 0.46m
- Position
- Full sun
- Hardiness
- Colder than -20C (RHS H7)
- Flowers
- Spring, Summer
Availability
Generally available in late Spring & Summer
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
The fluffy cornflower style blooms of this knapweed are rose purple with white centres. They are produced over a long season, from spring into summer, and again in the autumn, but never in quantity. The flowers are attractive to bees and good for cutting. The soft grey-green lobed leaves with grey undersides make a handsome, if somewhat disarrayed foliage mound. The roots are invasive.
- Flower colour
- Purple, Red, Rose
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Dome
- Height
- 0.6m
- Spread
- 0.46m
- Season of interest
- Spring, Summer
- Flowers in
- Spring, Summer
- Evergreen
- Deciduous
- Garden style
- Seaside garden, Gravel garden, Cottage garden
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Gravelly soil, Loam (normal), Poor soil, Sandy soil
- Soil pH
- All types
- Drainage
- Well drained soil, Dry soil, Drought resistant
- Hardiness
- Colder than -20C (RHS H7)
- Borders & containers
- Borders
- Use for
- Bee attraction, Butterfly attraction
- Hazards
- No
Spring
Spring-Autumn · Outdoors
Water in dry periods
Established plants in the ground can cope with 7-10 days of dryness, and shrubs often manage 2 to 3 weeks. Water one section of the garden thoroughly each day rather than a little everywhere. Check plants in pots more often, especially in hot weather.
Summer
Summer - early · Outdoors
Feed a general fertiliser
Where plants have moderate needs for nutrients, they can simply be given a general feed, fairly early in the growth season so that the growth has plenty of time to harden off before the cold weather.
Give plants a general boost with the application of a general purpose fertiliser which is spread around the root area of the plant, with amounts as directed on the feed label.
Found in
More Centaurea
Centaurea
Knapweed, Star thistle
Centaurea montana
Mountain knapweed, Perennial cornflower, Mountain bluet, Perennial bachelor's buttons
Centaurea 'Amethyst on Ice'
Knapweed, Star thistle
Centaurea 'Caramia'
Knapweed, Star thistle
Centaurea 'Jordy'
Knapweed
Centaurea 'Silver Feather'
Silver Feather knapweed
Centaurea bella
Beautiful knapweed
Centaurea cineraria subsp. cineraria
Dusty miller