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Where to plant. Blue flowers are rather rare among annuals. This is one of the reasons for the great popularity of the Ageratum houstonianum (mexicanum). The flowers are dainty and feathery, often delightfully fragrant, and usually completely cover the plants. There are attractive dwarf, tufted plants as well as tall, upright growers. The dwarfer sorts appear to produce much more […]
Named after Achilles, who is said to have used it as a treatment for his wounds (Compositae). Yarrow, milfoil. Hardy perennials, for the border or border rock garden. Species cultivated : Border A. filipendulina, large, plate-like heads of yellow flowers in summer; cultivars include ‘Gold Plate’, 4-5 feet, ‘Flowers of Sulphur , 2 feet, soft sulphur yellow flowers and powdered […]