The pest seaweed Undaria is a threat to Fiordland’s marine environment with its ability to quickly establish and outcompete native marine species.

Learn about the carnivorous weeds that can wreak havoc on New Zealand's native vegetation.

Freshwater weeds degrade New Zealand's wetlands and waterways. The plants described here pose the most serious threats.

Golden dodder is a threat to Waikato wetlands and lakes. It's a parasitic plant which sucks the nutrients out of host plants which weakens them. It can significantly reduce yields and plant growth.

Weeds threatening native flora and fauna on Matiu/Somes Island in Wellington Harbour.

Wilding conifers are invasive weeds that threaten to permanently alter the unique landscapes that are only found in New Zealand.