Centaurea 'John Coutts' is a clump-forming member of the Asteraceae that flowers from June to September. It carries deciduous foliage and prefers full sun on freely draining soils such as chalk, loam or sand. The plant tolerates acid, neutral and alkaline pH and suits both sheltered and exposed sites. Its hardiness rating is H5 (hardy).

Centaurea 'John Coutts' blooms June to September and suits full sun on well-drained chalk, loam or sand in south- or west-facing spots.

Centaurea 'John Coutts'

Centaurea 'John Coutts' | Summer-flowering

Centaurea 'Totnes Fat Lemon' is a clump-forming, spreading-branched herbaceous perennial in the Asteraceae with deciduous foliage. It flowers from June to September. Plant in full sun or partial shade in moist but well-drained soils, including chalk, clay, loam or sand. Suitable for exposed or sheltered sites and for south-, east- or west-facing aspects in UK gardens.

Centaurea 'Totnes Fat Lemon' is a clump-forming herbaceous perennial that flowers June to September and suits south-, east- or west-facing borders.

Centaurea 'Totnes Fat Lemon'

Centaurea 'Totnes Fat Lemon' | Perennial Centaurea

Centaurea atropurpurea 'Alba' is a perennial Centaurea that flowers through the summer, producing blooms from June to September. It comes from the Asteraceae family and is native to Greece. The plant prefers a sunny position in well-drained soil with only moderate soil moisture. Sit it where prolonged summer flowering will be visible, such as a front border or gravel bed.

Centaurea atropurpurea 'Alba' is a perennial cornflower from Greece that flowers June to September in full sun and well-drained soil.

https://en.wikipedia.org/wiki/Centaurea_atropurpurea

Centaurea is a genus of over 700 species of herbaceous thistle-like flowering plants in the family Asteraceae. Members of the genus are found only north of the equator, mostly in the Eastern Hemisphere; the Middle East and surrounding regions are particularly species-rich.

Centaurea atropurpurea 'Alba'

Cornflower | Centaurea atropurpurea 'Alba'

Centaurea cyanus 'Mauve Ball' is a herbaceous perennial in the Asteraceae that forms spreading, branched clumps to about 1.0 m. The plant is deciduous and flowers from June to September, producing compact flowerheads suited to cutting. It prefers full sun and will tolerate sandy, loamy or clay soils across a wide pH range so long as drainage is good. Hardy in most UK situations (H5–H7).

A clump-forming perennial to about 1.0 m that flowers from June to September and favours full sun with well-drained soils.

Centaurea cyanus 'Mauve Ball'

Cornflower | Centaurea cyanus 'Mauve Ball'

Centaurea cynaroides is a species of Centaurea in the aster family Asteraceae and is known in English as cornflower or knapweed. It is native to the Canary Islands. In cultivation it is primarily valued for its flowering season, which runs from June to September. The species is a member of a genus with many closely related taxa, so identification and care are species-specific.

Centaurea cynaroides is a Centaurea (cornflower/knapweed) from the Canary Islands that flowers from June to September.

Centaurea cynaroides

Centaurea dealbata steenbergii is a perennial in the Asteraceae grown for its summer-flowering display and use as an ornamental. It comes from the Caucasus Mountains and Turkey and performs best in full sun on well-drained soil with moderate moisture. Plant in a spot with good light and avoid waterlogging. Flowering occurs from June to September.

Mealy Centaury 'Steenbergii' (Centaurea dealbata steenbergii) is an ornamental perennial from the Caucasus that flowers June to September in full sun on.

https://en.wikipedia.org/wiki/Psephellus_dealbatus

Psephellus is a genus of flowering plants in the tribe Cardueae within the family Asteraceae, native to eastern Europe and western Asia. A taxonomic revision reassigned many species from Centaurea to Psephellus.

Centaurea dealbata steenbergii

Mealy centaury 'Steenbergii' | Centaurea dealbata steenbergii

Centaurea hypoleuca is a herbaceous, thistle-like species in the family Asteraceae. It sits within the Centaurea genus, a group of over 700 related plants mostly found across the Eastern Hemisphere. The species is native to the Transcaucasus and Turkey and carries common names such as Cornflower and Knapweed. It flowers from June to September.

Centaurea hypoleuca, a Centaurea native to Turkey and the Transcaucasus, flowers from June to September.

Centaurea hypoleuca

Cornflower | Centaurea hypoleuca

Centaurea hypoleuca 'John Coutts' is a Centaurea cultivar in the family Asteraceae, notable for its summer flowering from June to September. It is also known as Cornflower or Knapweed and sits within the genus Centaurea. The plant originates from the Transcaucasus and Turkey. Plan planting with its defined bloom window in mind for summer displays.

Cornflower Centaurea hypoleuca 'John Coutts' flowers from June to September and originates from the Transcaucasus and Turkey.

Centaurea hypoleuca 'John Coutts'

Cornflower | Centaurea hypoleuca 'John Coutts'

Centaurea jankae is a member of the Asteraceae and belongs to the Centaurea group of herbaceous, thistle‑like plants. Native to Romania, it is recorded under the English names Cornflower and Knapweed. In the UK it flowers from June to September, providing a summer display.

Centaurea jankae (Cornflower) is a Romanian Centaurea that flowers in the UK from June to September.

Centaurea jankae

Cornflower | Centaurea jankae

Centaurea montana 'Alba' is a perennial member of the Asteraceae that produces unmistakable white flowerheads. It typically grows to about 0.5 m tall and flowers through the summer. Plants prefer a sunny position in soils that are well drained but can tolerate sandy, loamy or clay textures.

White perennial cornflower (Centaurea montana 'Alba') bears white flowerheads from June to September in sunny, well-drained soil.

https://en.wikipedia.org/wiki/Centaurea_montana

Centaurea montana 'Alba'

White perennial cornflower | Centaurea montana 'Alba'

Centaurea montana 'Parham Variety' is a perennial cornflower in the Asteraceae that produces blue-purple flowers. It grows to about 0.5 m and prefers a sunny aspect in full sun. Flowering runs from June to September, making it useful for summer colour. Suited to borders, rock gardens and wildflower plantings, it favours well-drained soils.

Cornflower (Centaurea montana 'Parham Variety') is a perennial with blue-purple blooms from June to September, suited to sunny, well-drained spots.

Centaurea montana 'Parham Variety'

Cornflower | Centaurea montana 'Parham Variety'

Centaurea montana 'Parham' is a clump-forming perennial in the Asteraceae, notable for its blue–purple flower heads. It has deciduous leaves and forms clearly defined clumps. Flowering runs from June to September and it favours a sunny, well-drained site.

Perennial Cornflower Centaurea montana 'Parham' flowers June to September and prefers full sun on well-drained chalk, loam or sand.

Centaurea montana 'Parham'

Perennial Cornflower (Centaurea montana 'Parham') | Summer

Centaurea pulcherimma is a species in the genus Centaurea (family Asteraceae) that flowers from June to September. The botanical name should be used when sourcing plants to ensure correct identification. Confirm specific cultivation and hardiness information with the supplier or nursery before planting. Note the defined June–September flowering period when planning summer displays.

Centaurea pulcherimma flowers from June to September; consult the supplier for planting, hardiness and site details.

Centaurea pulcherimma

Centaurea rhaponticum is a member of the genus Centaurea in the Asteraceae family, commonly called Cornflower or Knapweed. It produces its flowers in the UK from June to September. The species name identifies it within a genus widely cultivated for summer blooms. Use plant labels and supplier notes for site and care details specific to this taxon.

Centaurea rhaponticum (Cornflower) flowers from June to September and belongs to the Asteraceae family.

Centaurea rhaponticum

Cornflower | Centaurea rhaponticum

Centaurea ruthenica is a herbaceous, thistle-like species in the genus Centaurea (family Asteraceae). The genus occurs only north of the equator and is most diverse across the Eastern Hemisphere, with many species in the Middle East. In the UK it flowers from June to September. Members of Centaurea are commonly referred to as knapweeds or centauries.

Centaurea ruthenica is a herbaceous, thistle-like member of the genus Centaurea that flowers from June to September.

Centaurea ruthenica

Centaurea salonitana is a species in the daisy family Asteraceae, commonly called Cornflower or Knapweed. It is native to several countries across south-eastern and central Europe. The species belongs to the Centaurea group and produces its flowering heads from June to September. Practical identification rests on its placement within the Centaurea genus and its recorded native range.

Centaurea salonitana (Cornflower) is native to parts of south-eastern and central Europe and flowers from June to September.

Centaurea salonitana

Cornflower | Centaurea salonitana

Centaurea simplicicaulis is a species in the genus Centaurea (family Asteraceae) known by common names such as cornflower and knapweed. It originates from the Caucasus region and neighbouring countries in the Middle East. Gardeners should note its documented flowering period is June to September. Identification relies on supplier or herbarium information because growth habit and leaf characters vary across Centaurea species.

Centaurea simplicicaulis (cornflower) is native to the Caucasus and nearby regions and flowers from June to September.

Centaurea simplicicaulis

Cornflower | Centaurea simplicicaulis

Centaurea stricta is a herbaceous, thistle-like member of the Asteraceae, recorded under the common names Cornflower and Knapweed. It is native to parts of Eastern Europe, including Kosovo, Ukraine, Macedonia, Germany, Poland, Montenegro and Albania. Flowering occurs from June to September. Species in this group commonly establish on open or disturbed ground and can naturalise where conditions suit.

Cornflower (Centaurea stricta) is native to parts of Eastern Europe and flowers from June to September.

Centaurea stricta

Cornflower | Centaurea stricta

Centaurea triumfettii subsp. stricta from Macedonia is an herbaceous perennial in the Asteraceae that forms spreading, branched clumps of deciduous foliage. It flowers from June to September and favours full sun or partial shade. The plant suits a range of soils — chalk, clay, loam or sand — provided they are moist but well-drained. Native to parts of south-eastern Europe, it adapts to exposed as well as sheltered sites.

An herbaceous perennial in the Asteraceae that flowers from June to September and suits sunny, well-drained borders, coastal and wildlife gardens.