Growth characteristics of marron in aquaculture ponds during the six-month warm period of Spring/Summer, has been documented for the first time. The changes in the population distribution immediately prior to marketing are examined and a population approach to growth hypothesised. The optimum growth of marron at low stocking density is recorded for the first time, which permits comparisons to the growth rates achieved during commercial production. The importance of aligning management to favourable temperatures over one summer is highlighted. The initial average weight of marron in five replicate ponds was 152.3g and at harvest after six months was 252.8g. Three growth habits were delineated including no moult approximately 10% of the population, one moult approximately 40% of the population with an average weight of 220g and two moults approximately 50% of the population with an average weight of 280g. Typically, males grew faster than females.