Hairy bittercress is a very common annual weed, appearing in both cultivated and uncultivated bare soil. It regularly grows in containers and may be introduced into the garden when buying new plants.
Plants grow very quickly, and several generations appear each year. Seedlings can appear at most times of the year and, as it is cold hardy, it survives through winters. It can even flower during mild winters. As a result, it quickly cover beds, borders and other parts of the garden.
Plants produce numerous seeds, which are explosively released from the seedpods, scattering the seeds far and wide.
These seeds can remain dormant in the ground for several years. And as “One year’s seeding means seven years weeding”, allowing plants to flower and produce seeds, means several years of trying to control and remove it.