Short-lived, hairless, scrambling herb. Stems are fleshy, < 10 m long and creeping or sprawling. Leaves are round, paler underneath and borne on a stalk attached to their undersides. Flowers have a basal spur and are tubular, orange/red/yellow and borne in October – May. Fruit is fleshy, green, segmented and contains ribbed green seeds.
Although nasturtium is not a legally declared pest plant, it may still be invasive in some situations. Consider lower risk alternatives for your garden, such as native plants.
Riparian margins, shrubland, wetlands, disturbed sites, urban areas, wasteland, roadsides.
Seeds dispersed by water and possibly birds. Vegetative spread from stem fragments. Human-mediated dispersal through dumping of garden waste.
Can form dense infestations and smother vegetation.
Follow up treated areas 3 times per year. Encourage natural regeneration of native plants or replant treated areas where possible after 2-3 treatments to establish dense ground cover and minimise reinvasion.
CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.