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Land plants will typically be killed by salt water. Some coastal plants and sea plants grow in salt water, but the rest of them tend to be stunted and die.

1. Watering plants with salt water causes physical damage to the root system preventing the plant from being able to absorb fresh water and nutrients.

2. Watering plants with salt water prevents the normal process of water absorption through osmosis from taking place as the concentration of salts in the soil is higher than that of the cell sap within the root hairs.

3. Watering plants with salt water (or even slightly saline water) causes changes in the pH of the soil; changes in soil pH can "lock up" certain minerals in the soil rendering them insoluble and inaccessible to the plant. In this respect even small amounts of salt water can result in plant nutrient deficiencies (stunting, discolouration etc.) sometimes exhibited in plants growing in saline soils.

Certain plants such as halophytes can metabolise and expel excess salt.

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12y ago
truly tha world may neva knowi know this because i did a science exit project on it and i neva found out what it realy was
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Q: Do plants grow better in saltwater or freshwater?
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