All banksias have developed proteoid or cluster roots in response to the nutrient-poor conditions of Australian soils (particularly lacking in phosphorus). The root system of the suckering forms of "Banksia marginata" in Victoria and South Australia have a characteristic pattern with a deep tap root, and an extensive system of thick lateral roots below the surface. During the winter months, segments around in length develop vegetative buds capable of forming suckers. Clusters of fine proteoid roots up to long arise from these lateral roots.