Originally Pittosporum undulatum grew in moist areas on the Australian east coast, where its natural range was from south-east Queensland to eastern Victoria,[4] but has increased its range since European settlement.
The earliest known record (according to the Australian Virtual Herbarium) is from Port Jackson, Sydney, in 1803.[4] However, P. undulatum's status around the Sydney area is contentious.[5] Even though it is native to the region, P. undulatum has spread to soils and bushland where it wasn't found before European settlement, often out-competing other plants.
Pittosporum has done especially well in areas where the environment has been altered by humans – for example by habitat fragmentation weakening other natives, by fertilizer runoff from homes increasing soil nutrients and by the suppression of bushfires near suburbs. Unlike most natives, P. undulatum takes advantage of high nutrient levels and its seeds can germinate without needing fire. This has led to the species sometimes receiving the "invasive" label although some[who?] think that it is merely returning to areas where it grew before people arrived in Australia and began burning the environment far beyond that which previously occurred.
Recommended control measures have included the identification and selective removal of female trees to prevent spread, as well as careful burning, where possible, together with follow-up weeding.
RE: Native Laurel, if only all weeds were this good