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Re:Plants “panic” when it rains by mytailorisrich on Thursday October 31, 2019 @04:56AM (#21406838)
Tap water is often hard so pouring it on the plant leaves deposits behind.

Another justification is that when it's sunny water droplets on leaves act as lenses and might burn the leaves.

It is also known that wet leaves increase the chance of fungi, mildew, etc. taking hold on them. The article shows that plants are also well aware of that!

Re:Plants “panic” when it rains by swiley on Thursday October 31, 2019 @08:57AM (#21408188)
I was always told that the leaves just don’t need it and it gets in the way.