Common Yarrow (Athair Thalún) This native wildflower is a strongly scented, downy perennial of pastures, roadsides and waste places throughout Ireland that flowers from June until November. Feathery foliage (‘millefolium’ means ‘a thousand leaves’) that is grey-green with creeping shoots. White, sometimes pinkish daisy-like flower heads. Site: Tolerates exposureSoil: Well-drainedPosition: Full sunSeason of Interest: Perennial, feathery foliage, white flower headsHardiness: Fully hardyHeight: 3-17in (10-40cm) Spread: 3-17in (10-40cm)