I found that you can just click very briefly over each plant about 3 times to water them fully and only use a tiny tiny amount of water, and it kind of negated any challenge the game had, but hey I guess it's supposed to be a relaxing game, and it didn't get in the way of that!
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yess! but you shouldn't be tempted to water all the plants at once. Even so, since watering depends on the click time, there are always slight differences, and you can try to water with the least amount of water possible. It still needs work, though. Thank you very much for the feedback and for taking the time to play it.