Common name: Yarrow
Achillea is a hardy herbaceous flowering perennial from North America.
Subject to variety they will grow to around 900mm (36") high and spread to around 600mm (24").
They are available in many colours and the clusters of flowers appear from July to September.
Achillea will tolerate most types of soil providing it is well drained and not subject to water-logging.
Similarly they will tolerate semi-shade but like many flowers they perform best in full sunlight.
Another of their attributes is: they are relatively drought tolerant, thus making them a suitable subject for planting out in dry areas.
If required for dried flower arrangements do not over water or over feed them, as this can affect the quality of the stems.
Deadhead plants as the flowers fade to encourage further flowering.
Plants will spread rapidly if conditions are right..
Divide them every 2-3 years.
Sow the seeds on the surface of seed compost, and then germinate at 20°C (68°F)
Germination can take up to 4 weeks.
If ground conditions are suitable, divide the roots into sections, ensuring each section has four or five young shoots growing from it, replant immediately into their flowering positions.
Prick off the seedlings when large enough to handle into cell trays/boxes of potting compost and grow them on in a coldframe until planting out time.
Plant out in a sunny position in any well-drained garden soil.
Spacings are subject to species, so do not plant them too close together.
Plants placed too close together can be affected by fungal diseases through poor air circulation around them,200-300 mm (8"-12") apart is usually sufficient for the more common varieties.
Cut tall varieties down to ground level
Note: Contact with the foliage can sometimes cause skin irritation.