Botany or Plant Biology

Does hot or cold water affect plant growth?

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Wiki User
2008-08-27 13:00:25

While ice cold water can shock the roots of a plant, hot water

can actually be worse.

Boiling or near boiling water can damage the fine roots of

plants, inhibiting water take-up by the roots.

Room temperature water is best, especially for watering house


If you have a dried-out peat based potting soil, warm (not hot)

water can help the peat to re-hydrate.

Hot water on foliage can also be detrimental - many leaves are

sensitive to direct extreme temperatures, which is one reason that

boiling water can be an effective organic herbicide to treat small

weedy tasks, like grass growing in sidewalk cracks.

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