Maturing takes very different lengths of time depending on the climate and the condition of the soil and differs considerably for the individual types of coffea – the coffee cherries of robusta coffee take about nine to eleven months to ripen, whereas those of arabica coffee take six to eight months.
During maturation the ovary usually develops into a double-seed stone fruit the shape of which is round to elongated and pointed, while the fruit of robusta coffee are slightly smaller and rounder. During maturation the coffee cherry changes colours – from the initial green it soon turns yellow, and the ripe fruit finally shines in bright red.