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Using Liquid Castile As Laundry Detergent

using liquid castile soap as laundry detergentWelcome back to our new series: “The Many Ways To Use Castile Soap”!

In our last blog post, we discussed how to use liquid castile soap as shampoo. Next, we’re going to tell you all about how to use our new probiotic, vegan, Liquid Castile Lactosoapcillus as laundry detergent!

How to use Liquid Castile Soap As Laundry Detergent

Step 1:

Put the soiled laundry into the washing machine and fill the washing tub with water.

Step 2:

Add the correct amount of liquid castile soap, depending upon the type of washing machine you have. For lightly-soiled loads, use less soap. And, for heavily soiled loads, use the maximum amount of soap recommended for your type of machine.

  • HE (high-efficiency machine): ¼ – ½ cup of liquid Castile for a large load.
  • Non-HE machine: ½ – 1 whole cup of liquid Castile for a large load.
Optional Step 3:

For extra whitening and deodorizing power, add ¼ cup of baking soda for HE machines and ½ cup of baking soda for non-HE machines.

Optional Step 4:

If you have hard water, the minerals naturally present in your water can react with castile soap. This can make it more difficult to rinse fully. Plus, it may potentially leave some soap residue behind on your fabrics.

To combat this, add ½ – 1 cup of white vinegar to your machine’s fabric softener compartment. This way it will dispense in the rinse cycle. If your machine does not have a fabric softener compartment, just add the white vinegar by hand once you hear your machine switch to the rinse cycle.

The addition of white vinegar is especially helpful when washing bedding, or similar heavy fabrics that may accumulate dust, dander, or other common household particulates. For those especially sensitive to allergens, such as asthmatics, make sure to use hot water for your wash and rinse cycles. Follow this up with high heat when drying, if possible.


Liquid castile soap is also an excellent stain pre-treatment and fabric spot cleaner!

  • For smaller, tough stains like tomato, grass, or oil-based stains – simply work full-strength liquid castile soap directly into the stain using your fingers, a washcloth, or a brush.
  • For larger, less-concentrated stains, combine a small amount of liquid castile soap with filtered water in a spray bottle. Then, use it to saturate the desired area before washing.
  • Allow your stain pre-treatment to sit for about thirty minutes. However, avoid allowing the treated area to dry fully before laundering as usual.

We hope you are enjoying learning all of the many ways that liquid castile soap can be used in our daily lives. Plus, all of the commercial cleaners can be replaced with a more natural and often more effective traditional soap.

Check out our brand new Liquid Castile Soap in the “Soap + Shampoo Bars” section of our Growing Organic Shop.

This is the latest addition to our Lactosoapcillus line of all-natural probiotic and vegan soaps, and you can count on it to deliver all of the same skin-loving probiotic benefits that you have come to love. We are happy to offer four customer-favorite, all-natural scents of liquid castile soap, including “Frankincense, Tea Tree & Lavender” “Lavender”, “Patchouli”, and “Peppermint and Eucalyptus”, as well as an “Unscented” option.

If you have any questions, suggestions, or feedback, as always please don’t hesitate to reach out to us.

Happy Washing!


  1. […] manage an existing flea problem, the best solution is to wash all of your pet’s toys and bedding using liquid castile soap and bathe your pet with castile shampoo frequently to kill off new fleas as they hatch. Check with […]

  2. Never put your clothes in the laundry first. You won’t get an even distribution of soap through the clothing. Start water, add soap, mix thoroughly and then add laundry. Lesson from my Grandmother when castile soap was all they used.

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