Charlock is an annual or winter-annual weed in the cabbage family, common in cultivated fields and waste ground, with yellow four-petalled flowers. It grows readily from seed in sunny, open ground.
Family
Brassicaceae (Cabbage family)
Grows as
Annual
Light
Full sun
Water
Water regularly while establishing, then let the top of the soil dry between waterings.
Soil
Any ordinary garden or field soil, tolerates poor soil.
Temperature
10–25 °C; tolerates light frost once established.
How easy
Easy
Safety
Not known to be toxic
About
Rhamphospermum arvense, (syns. Brassica arvensis and Sinapis arvensis) the charlock, sometimes also called field mustard, wild mustard, or charlock mustard, is an annual or winter annual plant in the family Brassicaceae. It is found in the fields of North Africa, Asia, Europe, and some other areas where it has been transported and naturalised. Pieris rapae, the small white butterfly, and Pieris napi, the green veined white butterfly, are significant consumers of charlock during their larval stages.
Where it grows
A native of the Mediterranean basin, from temperate regions of North Africa, Europe and parts of Asia. It has also become naturalised throughout much of North America, South America, Australia, Japan and South Africa.
Uses
Charlock leaves are edible at the juvenile stage of the plant; they are usually boiled, such as in 18th century, in Dublin, where it was sold in the streets. During the Great Famine of Ireland, wild mustard was a common famine food, even though it often caused stomach upset. Once the seeds are ground, they produce a kind of mustard.
Text excerpted from the Wikipedia article Rhamphospermum arvense by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.