Crocosmia x crocosmiiflora (montbretia)

Crocosmia × crocosmiiflora has been widely cultivated as an ornamental and has escaped from cultivation to become invasive in disturbed sites, riverbanks, wasteland, along roadsides, and shrublands (Ensbey et al., 2011; Weeds of Australia, 2016, Weeds of New Zealand, 2016). This species is well adapted to grow in a wide range of environmental conditions and soil types (it may grow in any soil, wet or dry, poor or rich). It competes aggressively with native vegetation for resources such as water and nutrients and it has the potential to displace native vegetation primarily in riparian areas and moist shrublands. Once established, it moves rapidly down watercourses into natural forests. The mass of corms in the soil contributes to the breakdown and erosion of natural creek and riverbanks (Ensbey et al., 2011; Weeds of the Blue Mountains, 2016).