Cold nighttime temperatures cause citrus to show deep orange color, and when the weather warms up again in late spring and early summer, the citrus tends to regreen.” The green is due to chlorophyll produced on the peel of orange citrus to protect itself from sunburn.

Are oranges bad when they turn green?

Signs of Spoilage

When oranges are beginning to spoil, they will become soft at first, and then develop a white mold. The mold will quickly spread and turn green. Oranges should be discarded as soon as they start to become soft. Discoloration is another sign that oranges are about to spoil.

How can you tell if an orange has gone bad?

Some common traits of bad oranges are a soft texture and some discoloration. The soft spot is moist and develops a mold, usually white in color at first. Bad oranges, just like bad orange juice and other fruit juices, will have a distinct sour smell and taste.