Nasturtium

Family:
Tropaeolaceae
Origin:
Europe, America, Africa, Asia

General description

Scrambling hairless aromatic annual or short-lived perennial. Succulent stems <10m long. Round leaves green above, bluish underneath, stalk attached to the back. Edible, open, tubular flowers (Oct-May), scarlet, yellow or commonly orange. Fruit green, 1-seeded carpels.

Prefers moist shady places: waste areas, hedges, roadsides, coastal areas, riverbanks.

Seeds dispersed by wind, water. Also spread from garden debris.

Forms dense cover restricting other vegetation, particularly on stream sides.

Site management

Easy to control. Check for resprouting stems, follow up 6-monthly. Replant sites densely to lower light levels.

Recommended approaches

1. Hand pull.
2. Spray larger infestations spring-summer (100ml glyphosate + 20ml penetrant/10L).

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

RPMS status

Not a legally declared pest plant
nasturtium - Main species image