P. These are mostly attractive border plants with daisylikewhich are valuable for . Light, well-drained soil is desirable, as some kinds are liable to die out in very wet winters. Most achilleas require careful staking. Suitable kinds include filipendulina (Gold Plate) which bears large, flat heads of bright yellow flowers in July and August on plants 4—5 ft. tall. If cut and dried they will keep their colour for several months. Coronation Gold resembles a dwarf form of Gold Plate, flowering about the same time and growing to 3 ft. A. ptarmica (Perry’s White) has broad heads of small pure white double flowers, reaching 2 ½ —3 ft. It is rather earlier than the foregoing.
A. millefolium is the familiar lawn weed known as yarrow. Cerise Queen and Fire King are improved forms suitable for gardenand . They are rosy-carmine and bright red respectively, flower from June onwards and grow to about 2 ft.
Some of the dwarf achilleas make effective rockery plants, provided the soil is not too rich. They include A. tomentosa aurea which bears small deep yellow flowers on 6 in.and has grey-green prostrate , and A. Clavennae with white flowers, about the same height. Both kinds bloom in early summer. Achilleas are readily increased by division in March.