VERIFIED FACT

Stressed plants can make ultrasonic clicking sounds.

Why this sounds fake

Plants look passive and silent to us, so airborne sounds from stressed leaves feel too animal-like.

Plants seem silent because their sounds usually sit outside human hearing. In a Cell study, tomato and tobacco plants produced airborne ultrasonic clicks when dehydrated or cut. The sounds were recorded from a distance and could be classified by stress type. Calling it screaming would be too loaded, because plants do not have throats or pain systems like animals. The accurate version is still weird enough: under stress, some plants emit high-frequency airborne sounds that nearby microphones, and possibly some animals, can detect. A quiet greenhouse may not be quiet at all.

The Surprise

The click is real; it just sits to the right of the band our ears can pick up, where only microphones reach.

A wilting tomato plant in a pot on the left emits faint navy sound waves rippling toward a microphone on the right. Below the scene a horizontal frequency axis labelled low frequency on the left and high frequency on the right shows two bands: a navy band labelled YOU HEAR sits on the left covering roughly twenty hertz to twenty kilohertz, and a gold band labelled CLICK FREQUENCY sits far to the right covering roughly twenty to one hundred kilohertz. A bracket between the two bands spans the empty middle and is labelled silent to humans, showing the click sits well outside the range a human ear can detect.
Tomato and tobacco plants emit airborne ultrasonic clicks under drought stress (Khait et al., Cell 2023).

1 discovery explored