Centaurea nigra - Knoopkruid (30)
Hoogte: 60 cm.
Bloeit: jun-aug
Type: HP
Winterhard in: zones 4-9 (-20 C)
Inheemse korenbloemsoort maar ook heel geschikt voor de border. Lokt tientallen bijen.
Zaai-instructies: Donkerkiemer. Kiem in 2-4 wk, 18-23C
Plant-instructies: Kalkrijke grond, zonnige plek
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Also known as Black Knapweed or Hardheads. A common and familiar plant with thistle like flower heads but spineless leaves and stem. The flower heads are purple or occasionally white and exist in two forms, rayed and un-rayed. The seeds were taken from plants with un-rayed flowers. Behind the flower is a hard head of overlapping bracts which sits upon the slightly swollen end of the stem.
Height: 60 cm.
Flowers: jun-aug
Type: HP
Hardy in: zones 4-9 (-20 Celsius)
Sowing instructions: Needs dark to germinate. Will do so in 14-30 days at 18-23 Celsius
Planting instructions: prefers a sunny spot in light, well drained soil.