Plain Water.
Sugar water causes a aciding effect on the plant and will form a white mold.
This is the plain water.
Sugar,sugar helps increase cellulose and help the plant grow faster. Plain water will maintain the status Que.
I think that sugar water will freeze faster.
For salt water to boil faster than plain water, the salt concentration would have to be fairly high. In addition, the salt water would need to be a salt water solution before putting the pot on to heat because of the density of the water content itself.
Test it yourself
plain water # ##### # # # ## # ## # ## # ##
No, addition of table salt (NaCl) to water used for watering plants will normally kill the plant.
plian water
Probably slower, since it has less concentration of water.
simply becuase the density of the water is increased..
Plain water evaporate faster.
plain not sure