Agrostemma githago – Corn Cockle

A medium to tall (up to 1m +) annual with long, narrow and softly hairy leaves. The large (up to 3.5cm across) pinky purple flowers are borne singly on a long stem and are surrounded by long pointed sepals. The flowers are followed by a straw coloured flask like seed head containing large (3.5mm) black, rough textured seed.

Habitat Information

Corncockle was introduced into Britain as a contaminant of grain at least as early as the Iron Age. It is a plant that can tolerate a range of soil types and can be a weed in cereal and other arable crops. In Britain its stronghold appeared to be within rye crops on the light, sandy soils of the south and east of the country. Although never common it suffered a dramatic decline at the beginning of the twentieth century with the development of improved seed cleaning techniques. It is now virtually extinct in the wild.

Growing Information

Seed can be sown onto a bare earth site in the autumn or spring. As the seed is short lived once in the soil it is probably best to avoid sowing in winter or early summer. Corncockle can be established on most soils but does particularly well on free draining sandy loams. Being an annual it requires open ground to re-establish itself, so an autumn cultivation is essential if you wish it to return. Corncockle is often used in association with other cornfield annuals, as with our EC1 and EC2 mixtures, to provide some first year colour and as a nurse crop when sowing a meadow mixture.