How long can ripe oranges be left on tree?

Ripe oranges can typically be left on the tree for several weeks to a few months, depending on the variety and climate conditions. However, it's important to monitor the oranges and harvest them before they become overripe or start to deteriorate. Overripe oranges may become soft, develop blemishes or mold, and lose their optimal flavor and nutritional value.

In general, it's recommended to harvest oranges when they reach their desired level of ripeness and sweetness, which can be determined by observing their color, texture, and taste. Ripe oranges typically have a deep orange color, slightly soft skin, and a sweet, juicy flesh.

To ensure the best quality and freshness, it's advisable to harvest oranges as close to the time of consumption as possible. However, if you have a large harvest or want to store oranges for later use, you can carefully pick the ripe ones and place them in a cool, dry location with good air circulation. This can help extend their shelf life and maintain their quality for a longer period.