Gorse and brooms, such as Scotch, or Scot’s broom (Cytisus scorparius, C. striatus, Spartium junceum, Genista monspessulana and Ulex europaeus ) are perennial evergreen shrubs that bloom in April-June. They have many slender, erect, dark green angled branches with small, simple leaves and lots of small, pea-shaped flowers. Gorse has distinctive 1 inch thick spines.
They will displace native plants and increase the costs of timber production by invading disturbed sites, natural areas, dune and public/private forest lands. The seeds live over 50 years and mature plants produce a lot of seeds requiring long-term maintenance.
Mow prior to April 15 but not when the pods are ripe with seed. Pull the smaller plants by hand or with a weed wrench. Cut back larger plants and dig out the roots. Mid-to-late summer cutting is best when the plant is stressed. There are three biological control agents; a beetle, a seed weevil and a twig miner are approved for release and have been established in Oregon.