Achillea ptarmica is a European species of herbaceous perennial flowering plant in the genus Achillea. It is widespread across most of Europe and naturalized in scattered places in North America.
Achillea ptarmica has loose clusters of showy white, flower heads that bloom from June to August. Its dark green leaves have finely toothed margins. Like many other plants, the sneezewort's pattern of development displays the Fibonacci sequence.
The name ptarmica comes from the Greek word ptairo (=sneeze) and means 'causes sneezing'.
Easily grown in average, dry to medium, well-drained soils in full sun. Tolerates some light shade. Plants do well in average garden soils and tolerate poor soils as long as drainage is good. Avoid heavy clays and moist, rich, fertile soils.
Plants will tolerate hot, humid summers and drought. Plants are best sited in locations protected from strong winds.
Leaves can be eaten raw or cooked. Achillea ptarmica yields an essential oil that is used in herbal medicine. The leaves are used as an insect repellent.
The plant is poisonous to cattle, sheep, and horses.
Information sources: wikipedia.org, missouribotanicalgarden.org.
Genus - Achillea
Species - Ptarmica
Common name - Sneezewort
Pre-Treatment - Not-required
Hardiness zones - 3 - 9
Height - 0,30 m
Spread - 0,60 m
Plant type - Perennial fower
Exposure - Full sun to Part shade
Growth rate - Fast
Soil type - Average garden soils, tolerate poor soils as long as drained
Water requirements - Average, dry
Landscape uses - An easy to mass perennial which will provide excellent contrast and long bloom to the border.
Bloom season - June to September
Leaf / Flower color - Green / White
Sow spring (March - June) or early autumn (September) in a cold frame. The seed usually germinates in 1 - 3 months.
When large enough to handle, prick the seedlings out into individual pots and plant them out in the summer.
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