A perennial herb widely naturalised on cliffs, old walls and rocks, particularly on calcareous substrates where it is often very persistent. It tolerates poor, thin, dry soils, but a warm site is essential. Lowland.
E. cheiri has been cultivated since medieval times, and its first record as a wild plant was as long ago as 1548. There has been no change in its range since it was mapped in the 1962 Atlas; the increase in frequency may reflect the more enthusiastic recording of alien species in recent years.
A plant of garden origin, widely naturalised in W. & C. Europe.
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Light (Ellenberg): 8
Moisture (Ellenberg): 4
Reaction (Ellenberg): 8
Nitrogen (Ellenberg): 5
Salt Tolerance (Ellenberg): 1
January Mean Temperature (Celsius): 4
July Mean Temperature (Celsius): 15.6
Annual Precipitation (mm): 848
Height (cm): 60
Perennation - primary
Life Form - primary
Life Form - secondary
Clonality - primary
Count of 10km squares in Great Britain: 907
Count of 10km squares in Ireland: 97
Count of 10km squares in the Channel Isles: 8
Atlas Change Index: 1.05
Weighted Changed Factor: 49
Weighted Change Factor Confidence (90%)
Atlas text references
1990. Flora dels Països Catalans, II. Crucíferes-Amarantàcies.
Jalas & Suominen (1994)
1991. Crucifers of Great Britain and Ireland. Botanical Society of the British Isles Handbook no. 6.