The feral olive is readily dispersed by birds to become a major environmental weed in parts of south-east of Australia. It can dominate forest or woodland understorey.
African Olive is a well-branched evergreen shrub or tree growing 2-10 (rarely to 15) m high.
Feral olive (Olea europaea subsp. europaea) is not declared in NSW under the Noxious Weeds Act 1993.