Gorse naturalised in New Zealand as an invasive weed

Background. Ulex is a genus of thorny evergreen shrubs in the pea family. The most widespread species, common gorse, is native to western Europe and grows in sunny, dry, sandy sites. It thrives in poor conditions, including drought and rocky soils, where many other species cannot survive.

Introduction to New Zealand. Common gorse was originally introduced to New Zealand as an ornamental plant or hedge. In many areas, including New Zealand, it has become an invasive species owing to its aggressive seed dispersal. This introduction has led to significant ecological challenges for native habitats.

Ecological Impact. Gorse is detrimental to native habitats in New Zealand. It is difficult to eradicate once established. Control measures are required to remove gorse completely or limit its extent where it is undesirable for agricultural or ecological reasons. Biosecurity New Zealand maintains registers of invasive species.