Common tansy will compete against desirable plants with its extensive, spreading root system and it ability to produce a large amount of seed.
Common tansy is a perennial plant to 1.5 m high. Bright yellow button-like flowers with a flat top grow in clusters.
Richardson F.J.,Richardson R.G. and Shepherd R.C.H (2006).Weeds of the south-east an identification guide for Australia. (R.G. and F.J. Richardson, Melbourne).
Common tansy (Tanacetum vulgare) is not declared in NSW under the Noxious Weeds Act 1993.