Greater Knapweed (Mínscoth Mór) A native perennial wildflower with striking large, thistle-like purple flowers from July to September. Found in scrub and on sea cliffs. This is a tall, upright plant which will be loved by bees and other pollinators alike. Great for a bee or butterfly garden or a colour bed. Site: Tolerates exposureSoil: Any well-drained but likes lime soilsPosition: Full sun to part shadeSeason of Interest: Perennial, large purple flowers Jul-Sept, clumping habit, bee plantHardiness: Fully hardyHeight: 2-3ft (0.5-1m) Spread: 3-17in (10-40cm)