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Showing RHS Chelsea Flower Show Special conditions : Dry sun How much sun : Sun Soil pH : Alkaline Sowing month outside : April Season of Interest : Summer Sowing month inside or protected : March Attractive to wildlife : Attractive to pollinators clear all

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Showing RHS Chelsea Flower Show Special conditions : Dry sun How much sun : Sun Soil pH : Alkaline Sowing month outside : April Season of Interest : Summer Sowing month inside or protected : March Attractive to wildlife : Attractive to pollinators clear all

View info Centaurea Nigra | Black Knapweed Or Common Knapweed

From £2.99

approx 20 seeds

9cm pot

3 × 9cm pots

6 × 9cm pots

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