Achillea filipendulina - Hardy herbaceous perennial. 90-150 cms height, 50-60 cms width. Full sun, but tolerates some light shade. Large clusters of golden yellow flowers held on tall stems through summer and autumn. Make good cut flowers and can also be dried. Spreads to form clumps only. Drought tolerant once established. Tolerates hot weather well. Grows in most well drained, moist soils. Flowers attractive to bees and butterflies. Can grow in coastal gardens. Good companion plant as it improves the health of nearby plants and intensifies the flavour of nearby herbs. One of the largest yarrows.