Best grown in light, well-drained soils with a neutral pH in full sun. Good drainage is the key to growing this plant well. Tends to rot in wet, poorly drained soils. Particularly intolerant of wet soils in winter, and benefits from a light, dry winter mulch. Best performance is in cool summer climates such as the Pacific Northwest. Generally intolerant of high heat and humidity, and does not grow well in the deep South (south of USDA Zone 7). Remove spent flowers to encourage additional bloom.
Scabiosa caucasica or pincushion flower is a clump-forming perennial that typically grows to 18-24” tall. Species flowers (1.5-3” diameter) feature an outer ring of lobed, pale blue petals with a whitish to pale yellow center cushion. The Perfection Series of cultivars features plants with frilly outer petals. ‘Perfecta Blue’ or ‘Blue Perfection’ features outer petals of lilac blue. Plants sold as ‘Perfecta’ generally are the same as ‘Perfecta Blue’. ‘Perfecta Alba’ features outer petals of creamy white. Flowers bloom singly on strong, stiff stems from late May to late summer. Good fresh cut flower. Grayish-green foliage features entire, lance-shaped, basal leaves and pinnately-lobed stem leaves. The center cushions of these flowers have protruding stamens resembling pins in a pincushion, hence the common name. Species is native to the Caucasus Mountains, hence the specific epithet.
No serious insect or disease problems. Must have well-drained soil to thrive.
Borders, cottage gardens or cutting gardens.