Reusing bath water for watering plants - Knowledgebase Question

Interlaken, Ne
Question by martybradsha
August 25, 2009
I'd like to reuse bath water to water my outdoor roses, perennials, and shrubs. Would the soap/shampoo in this water pose any harm to the plants? Thank you.


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Answer from NGA
August 25, 2009

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What you describe is commonly called gray water and unless there are local restrictions against using it, you can generally use gray water for ornamental plants. The soapy residue will be filtered out by the time the water percolates down through the soil and gets to the roots of your plants, but if you use a lot of gray water, the residue will eventually build up in the top layers of the soil. To avoid this, use the water on different plants around the garden rather than always dumping it in the same spot time after time.

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