A study found tobacco and tomato plants emit ultrasonic “squeals” when stressed. Microphones 4″ away picked up the sounds when plants had stems cut/were under-watered: an average of 15 – 25 sounds within 1 hr from cutting, and 11 – 35 sounds per hr from drought. – Tiny Fox Lab Facts
Preview photo credit: Bonnie Plants
Source: smithsonianmag.com/smart-news/sci…
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