tepid
Plants use water to make their own food.
Collect rain water and use it to water plants ( if u have them). Use rice water to water plants ( ^^)
Cold water is generally not recommended for any plants. It is best to give the plants room temperature water. With orchids especially, make sure the water would match the temperature of a jungle rain.
Same as the ambient air is to avoid shocking the plants.
Assuming you mean for plants, think "rain temperature." Not hot, but room temperature to slightly cooler than that.
Yes, especially if that is their environment.
You can use water at room temperature.
They use it for photosynthesis
Tepid water. Avoid watering plants with cold water.
At the same rate you would use 10 gallons.
C2O because human drink H2O AND PLANTS NEED SOIL,TEMPERATURE
NO