Centaurea cyanus

Common name: Knapweed, Perennial cornflower

Family: Compositae

Plant type Perennial
Height 12 to 24 inches
Spread 12 to 24 inches
Habit Bushy
Growth rate Moderate
Interests Flowers
Uses Borders
Skill level Beginner
Maintenance Slight
Hardiness 3
Heat zone
Sun Full sun
Moisture Dry to moist
Soil type Slightly acid to slightly lime
Soil fertility Barren to moderate
Water consumption Moderate
Site Sheltered to average
Flower colour Pink, purple
Flower season Late spring to late summer
Flower size Medium
Foliage colour Green
Fruit colour
Edible parts
Harvest time

Centaureas are perennials with purple thistle-like flowers borne throughout summer.

Grow centaureas in well-drained soil, even poor soil in full sun.


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