An annual found in arable land, gardens, waste places, rubbish tips and on roadsides. 0-450 m (Clun Forest, Salop).
This species has been a weed of cultivation since the Neolithic, and it was formerly the major contaminant of agricultural seed in Britain. It was mapped as `all records` in the 1962 Atlas. Analysis of the database reveals that the widespread decline in N. England and Scotland has occurred since 1950, possibly as marginal cultivations are abandoned.
As an archaeophyte F. convolvulus has a Eurosiberian Wide-temperate distribution, but it is widely naturalised so that its distribution is now Circumpolar Wide-temperate.
Light (Ellenberg): 7
Moisture (Ellenberg): 4
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 5
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.7
July Mean Temperature (Celsius): 14.9
Annual Precipitation (mm): 971
Height (cm): 100
Perennation - primary
Life Form - primary
Clonality - primary
Count of 10km squares in Great Britain: 2139
Count of 10km squares in Ireland: 519
Count of 10km squares in the Channel Isles: 13
Atlas Change Index: -1.31
Weighted Changed Factor: -4
Weighted Change Factor Confidence (90%)
Atlas text references
1988. Comparative Plant Ecology.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
1983. The biology of Canadian weeds. 60. Polygonum convolvulus L. Canadian Journal of Plant Science. 63:959-971.
Jalas & Suominen (1979)
1981. Docks and knotweeds of the British Isles. Botanical Society of the British Isles Handbook no. 3.