Is well water good for plants?
Yes, well water is good for plants.
All of these are good for plants. Tap water, though not fit for human consumption is good for plants unless there are harmful micro-organsims present in it. Mineral water is good for humans and plants. In plants, they provide some essential minerals. Distilled water is good as they do not contain any germs but they provide no other substances.
Plain water - more minerals. Plants need many nutrients to grow well, much of which is obtained from the water. Distilled water removes all nutrients so is not a good growing medium. There are, however, some things placed in water that can make them not good for plants and in fact poisons. In all, natural, clean water is best.
How are plants that are grown in poor soil likely to differ from plants that are grown in good soil?
Good soil has a lot of good nutrients that your plants need. Poor soil usually lacks nutrients for the plants so the difference is great. Good soil: The leaves will be nice and green, ( if you water it well) Poor soil: they will be yellow Good soil: The produce will have out bursting flavor. Poor soil: It will be tasteless.