Green-cheeked conures form groups of around 10 to 20 birds, and tend to roost in treetops. Larger groups will be found where food is more abundant. They eat seeds, vegetables, berries, nuts, flowers, and fruit. Green-cheeked conures nest in hollow trees, where they lay 4 to 6 eggs per clutch. Incubation lasts around 25 days.
Green-cheeked conures can live around 30 years.