Nasturtium (garden nasturtium)
|Botanical Name||Tropaeolum majus|
|Origin||South America. Northern Andes|
IdentificationHairless aromatic annual or short-lived perennial with long trailing succulent stems. Leaves round to 210 mm in diameter. Flowers Oct-May, conspicuous large yellow-reddish, open tubular flowers.
HabitatsCommonly cultivated. Warmer lowland areas, especially coastal. Wayside and waste places especially moist, shady situations, also riverbanks and waterways in built up areas. Garden escape locally common, especially near towns.
Impact to Biota and EcosystemsCan form dense cover restricting native vegetation. Plants growing on streamsides and riverbanks are the most heavily impacted species.
Dispersal Routes, Vectors, Infestation SourcesSeed. Cultivation escape dumping of garden waste.
Easily hand pulled.
Compost. A finely chopped mulch might not resprout.
Spray with Glyphosate + Penetrant if more appropriate than hand pulling.
Rate - Handgun 1 litre Glyphosate + 200 mls Penetrant/100 litres water. Knapsack 100 mls Glyphosate + 20 mls Penetrant/10 litres water.
Hand pull wherever possible. Spray larger infestations.