[A Reyt Tayty]

How come many people frown upon misting indoor toms? Those which are outside get rain/mist/dew on them and don't seem to suffer any ill effects. Funny how indoor tom leaves seem to get sunspot if they have a bit of water on them, but those outside dont. What's all that about?

[Trillium]

It's all about how the glass or plastic act as prisms on the water and magnify them into burning. Outside, they dry out too fast for the prism effect.

[Totty]

There is the benefit of airflow with outdoor plants too. In a greenhouse, the plants don't have the breezes and wind to stop water and mould spores sitting on your plants.

Totty

[superpete]

 Reyt Tayty - water on a  plants leaves causing scorching may not be as we were once told...

http://www.telegraph.co.uk/science/science-news/7823032/Sunburnt-plants-myth-is-debunked.html