Will there be a bad effect to plants if it will be watered with salt water?

Answer 1

Yes, many will keel over and die, but If you need to use salty water you can still have a beautiful garden. This website contains a list of salt tolerant plants, there are even salt tolerant turf grasses available.

Answer 2

Yes, while the plant is still getting water, the plant will in effect become dehydrated because water will be leaving the cells of the plant and into the vessels that carry the water through the plant. This is due to the basic principles of diffusion and osmosis. If there is a high concentration of solute in one area, the plant will naturally try to add more solvent (more water) to balance out the concentration of solute. The only way to do this is to take water out of the cells. If the cells of the plant do not have enough water, the whole plant will become limp and lose health.

Answer 3

Maybe. Some plants will die but others are tolerant of saltwater. If you find plants that grow farther away from the ocean like most of our vegetables, they'd probably die. But daylilies tolerate salt pretty well and are used for landscaping around houses near the ocean.