Who are the 'Dirty Dozen'?

Wilding conifers (10 species) alters our landscape, takes up large amounts of water from the water table and prevents regeneration of native species.

Buddleia forms dense stands in wide range of habitats. In riverbeds it can alter water flow, causing silt build-up and flooding.

Woolly nightshade produces toxins that poison the soil and inhibits regeneration.

Darwin's barberry replaces shrubland and regenerating forest.

Wild ginger grows from rhizomes. Dense beds replace all other species, and are shallow rooted, so when they become heavy with rain they can slip on steep sites and streambanks, causing erosion.

English ivy is a both a ground cover and climbing vine. It smothers and kills all plants from ground level to canopy, and prevents the establishment of native plant seedlings.

Wandering willie is also a ground cover. Like ivy it smothers the ground, preventing native seedlings ...more ↓

Posted on March 18, 2024 01:54 AM by murray_dawson murray_dawson | 0 comments | Leave a comment
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This project promoted the Department of Conservation's (DOC's) Dirty Dozen initiatives in 2016 and 2017 as part of their 'War on Weeds' fight (

murray_dawson created this project on August 02, 2016
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