Which water is good for plants?
While plants love rain water as it is the most purest unadulterated form of water available to them in ideal situations, well, lake, river and borewell r next best options available
Filter and RO water may be devoid of essential minerals that plants require for their growth.
Sea water ofcourse is a no no for majority of the plants.
RO waste water might be high on TDS/ph levels depending on the water source and unsuitable for some plants. Can be used on trial basis and regularly checking on plant adaptability and sensitivity.