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Just water, please

Last summer, when it was very hot, I ran my dehumidifer upstairs when it was impossible to cool and used the water to water my indoor plants. Within a week or so they perked up like they were new plants, so I’m wondering how to duplicate that water, or what do you suggest? I have tried plant food, tea water, etc. and nothing works like the water from my dehumidfier. -S.W.

Houseplants may benefit from water that is free of added chemicals.

A likely explanation might be that since the water in a dehumidifier is “collected” from the air, nothing has been added — no chlorine or fluoride, such as we have in tap water. A lot of houseplants are sensitive to the additives in tap water, especially fluoride, according to my favorite source on caring for houseplants, author Barbara Pleasant’s Compete Houseplant Survival Manual.

You may be able to duplicate that unadulterated water by letting tap water sit out overnight before watering plants with it; supposedly that allows the chlorine and other chemicals in the water to escape. Or you could try using distilled water, or collect rainwater to use on your plants.

The author goes on to suggest using water that is at room temperature when you give it to the plants. “Giving cold water to tropical plants chills their roots, which can cause them to rot,” she writes.”

 

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