How to Use Bath Water to Water Plants


Using bath water to water plants is one way to recycle water that would otherwise go down the drain. In times of drought, to conserve water or simply if you're trying to cut your water bill, you can save water left over from baths and use it to water your house plants. Plants won't be harmed by the minimal quantities of soap usually found in bath water. Don't use bath water on any edible plants, though, since bath water may contain harmful bacteria you don't want to ingest.

Step 1

Leave the plug in the tub after you finish your bath. Allow the water to cool.

Step 2

Fill a watering can or bucket from the tub. Use this container to water your plants.

Step 3

Check local regulations before using bath water on any plants outside of the house. Many states and municipalities prohibit the use of bath water (otherwise known as gray water) on lawns or garden plants.

Tips and Warnings

  • If you have a water softener, the higher quantities of sodium in the water could build up in plants, so alternate watering with non-bath water. Don't keep the water in the tub for more than a day, as this could encourage the growth of bacteria.

Things You'll Need

  • Watering can or bucket


  • University of California, Davis: Using Household Wastewater on Plants

Who Can Help

  • Maryland Cooperative Extension: Water Conservation in the Home
Keywords: bathwater to water plants, graywater on lawns and garden, conserve water

About this Author

Cynthia James is the author of more than 40 novels and her nonfiction work has appeared in publications ranging from Modern Bride to Popular Mechanics. A graduate of Sam Houston State University, she has a degree in economics. Before turning to freelancing full time, James worked as a newspaper reporter, travel agent and medical clinic manager.