
Achillea ageratum
Achillea ageratum
Safety & Hazards
None known
Cultivation Details
Hardy to about -20°c[1]. Succeeds in most soils but prefers a well-drained soil in a sunny position[2, 3]. It also succeeds in partial shade[1]. Plants live longer in a poor soil[3]. Established plants are very drought tolerant, they can show distress in very severe droughts but usually recover[4]. Plants succeed in maritime gardens[5]. An excellent plant to grow in a large pot, the long stems will tend to arch down and continue to flower for a long time[6]. The leaves have a pungent aroma, especially when the plant is grown in a hot sunny position[7]. The plant is intermediate between Ahillea millefolium and Achillea ptarmica in its characteristics[5]. There is at least one named variety, selected for its ornamental value[5]. Hybridizes freely with other members of the genus[3].
Propagation
Seed - sow spring or early autumn in a cold frame[8]. The seed usually germinates in 1 - 3 months[8]. When large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. If this species is a hybrid it might not breed true from seed. Division in spring or autumn. Very easy, the divisions can be planted direct into their permanent positions. Basal cuttings of new shoots in spring. Very easy, collect the shoots when they are about 10cm tall, potting them up individually in pots and keeping them in a warm but lightly shaded position. They should root within 3 weeks and will be ready to plant out in the summer. Cite as: Temperate Plants Database, Ken Fern. temperate.theferns.info. 2026-02-20. <temperate.theferns.info/plant/Achillea+ageratum>
Pollinators
Insects
References
- [1]Perennials. Volumes 1 and 2. — Phillips. R. & Rix. M. · Pan Books · 1991 · ISBN 0-330-30936-9 ↩︎Photographs of over 3,000 species and cultivars of ornamental plants together with brief cultivation notes, details of habitat etc.
- [2]RHS Dictionary of Plants plus Supplement. 1956 — F. Chittendon. · Oxford University Press · 1951 · ISBN - ↩︎Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [ 200 ]).
- [3]The New RHS Dictionary of Gardening. 1992. — Huxley. A. · MacMillan Press · 1992 · ISBN 0-333-47494-5 ↩︎Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
- [4]The Dry Garden. — Chatto. B. · Dent · 1982 · ISBN 0460045512 ↩︎A good list of drought resistant plants with details on how to grow them.
- [5]Perennial Garden Plants — Thomas. G. S. · J. M. Dent & Sons, London. · 1990 · ISBN 0 460 86048 8 ↩︎A concise guide to a wide range of perennials. Lots of cultivation guides, very little on plant uses.
- [6]Herbs — Phillips. R. & Foy. N. · Pan Books Ltd. London. · 1990 · ISBN 0-330-30725-8 ↩︎Deals with all types of herbs including medicinal, culinary, scented and dye plants. Excellent photographs with quite good information on each plant.
- [7]Scented Flora of the World. — Genders. R. · Robert Hale. London. · 1994 · ISBN 0-7090-5440-8 ↩︎An excellent, comprehensive book on scented plants giving a few other plant uses and brief cultivation details. There are no illustrations.
- [8]Growing from Seed. Volume 1. — Rice. G. (Editor) · Thompson and Morgan. · 1987 · ISBN - ↩︎Very readable magazine with lots of information on propagation.
- [9]Cornucopia - A Source Book of Edible Plants. — Facciola. S. · Kampong Publications · 1990 · ISBN 0-9628087-0-9 ↩︎Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
- [PFAF]Plants for a Future — pfaf.org ↩︎