| Can I use my old bathwater to water my plants? Yes, you can reuse your bathwater—often called greywater—to water your plants, but you need to be careful about what’s in it. Greywater is water that’s been used for washing (like from baths, showers, or sinks) but doesn’t contain sewage. It can be a great way to reduce water waste, especially in dry spells or if you’re eco-conscious. The key thing is what you used in the bath. If you used mild, biodegradable soaps and didn’t add anything like bleach, bubble baths with lots of artificial fragrance, or oily bath products, then your bathwater is generally safe for most outdoor plants—particularly shrubs, lawns, and ornamental flowers. On the flip side, if your bath included things like salty bath soaks, heavy-duty shampoos, or products with lots of chemicals, it’s best not to use that water in the garden. Those ingredients can build up in the soil and eventually harm your plants. Also, it’s a good rule of thumb to avoid using greywater on plants you eat—like vegetables and herbs—unless you’re absolutely sure the bath products were natural and plant-safe. So yes, reusing bathwater can be a smart, sustainable move—just keep a close eye on what’s in it and use it sensibly. |
Using Bathwater for Plants: Safe or Not?
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