Auckland campus is closed at COVID-19 Alert Level 3. More information.
This site is dedicated to informing people about weeds in New Zealand. It has been designed both for members of the public and for students looking for information on weeds.
This site provides information on 77 of the more troublesome weeds found in New Zealand agriculture and horticulture. With over 2000 weeds in New Zealand, we do not cover all species, but you will find many of the weeds that commonly cause problems in our pastures, crops, lawns and gardens.
Each page has information on how to identify the featured weed (with photos) as well as information about the weed and some suggestions on how best to control it.
A 3-day short course on Understanding Herbicides is available at Massey University for members of the public wanting to learn how to control weeds using herbicides. There is also a university distance course available on Controlling Weeds. Click here for more information.
This resource has been created, and is maintained, by Dr Kerry Harrington.
Annual poa
Black nightshade
Blackberry
Bracken
Broad-leaved dock
Broad-leaved fleabane
Broad-leaved plantain
Broom
Californian thistle
Cape weed
Catsear
Chickweed
Cleavers
Clustered dock
Couch
Creeping buttercup
Creeping oxalis
Creeping speedwell
Daisy
Dandelion
Fathen
Fiddle dock
Field speedwell
Galinsoga
Giant buttercup
Gorse
Great bindweed
Groundsel
Hairy buttercup
Hawkbit
Hawksbeard
Hedge mustard
Hemlock
Hydrocotyle
Ivy
Mallow
Manuka
Mouse-ear hawkweed
Musky storksbill
Narrow-leaved plantain
Nettle
Nodding thistle
Onehunga weed
Oxeye daisy
Parsley dropwort
Parsley piert
Paspalum
Pennyroyal
Pink shamrock
Ragwort
Red dead-nettle
Redroot
Scarlet pimpernel
Scotch thistle
Scrambling fumitory
Scrambling speedwell
Selfheal
Sheep's sorrel
Shepherd's purse
Sow thistle
Spurrey
Staggerweed
Stinking mayweed
Suckling clover
Sweet brier
Tauhinu
Tradescantia
Turf speedwell
Twin cress
Water pepper
White clover
Wild radish
Wild turnip
Willow weed
Winged thistle
Wireweed
Yarrow