Suppose that you are at your grandmother’s house on a hot, summer day. Your cousin, Bertha, offers you a tall glass of ice cold water. You take a big drink only to learn that Bertha has played a joke on you. She has put 3 tablespoons of salt in the water. You spit the water out, pour what is left into a pot containing one of your grandmother’s ferns and chase Bertha into the house. What will happen to the fern? Why?
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If saltwater is poured over a plant, contact with the leaves and stems will not usually harm the plant. If the saltwater soaks the leaves and stays on them for an extended period of time, the leaves might absorb the salt through their pores. However, most water will quickly be absorbed off of the leaves, leaving at the most a slight salt residue, which can inhibit photosynthesis. The real danger occurs when the saltwater falls on the ground and is absorbed into the soil.
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