How to Use Castor Oil for Hair: A Simple Weekly Pre-Wash Routine

In short: apply castor oil to dry hair before you wash, focusing on the roots and scalp. Massage for a few minutes, leave it on for one to three hours, then wash it out with shampoo, twice if needed. Once a week is enough for most hair types. Because pure castor oil is very thick, it is easier to use when it is blended with a lighter oil.

What castor oil is, and why it feels so different

Castor oil is pressed from the seeds of the castor plant (Ricinus communis). Most of the oil, typically around 85 to 90 percent, is made of a single fatty acid called ricinoleic acid. That is unusual among plant oils, and it is the reason castor oil is so thick and sticky compared with olive, argan or coconut oil.

That thickness is both its strength and its challenge. A rich oil coats the hair and helps reduce moisture loss and friction, which is why people use it on dry lengths and brittle ends. On the other hand, pure castor oil is hard to spread and hard to wash out.

Before or after washing?

Use castor oil before you wash, as a pre-wash treatment. Applied after washing, it leaves hair heavy and greasy. As a pre-wash oil it has time to coat the hair, and the shampoo removes the excess afterwards.

Wet or dry hair?

Apply it to dry or slightly damp hair. Oil and water do not mix, so oil spreads more evenly and sticks better on dry hair.

A simple weekly routine, step by step

1. Section your hair. Divide dry hair into four to six sections so you can reach the scalp.
2. Apply to the roots. Use a dropper to place a few drops along each parting. A little goes a long way: start with less than you think.
3. Massage. Gently massage your scalp with your fingertips for a few minutes, then run any oil left on your hands through the lengths and ends.
4. Wait. Leave it on for one to three hours. You can wrap your hair in a towel or a shower cap.
5. Wash it out. Apply shampoo to dry, oiled hair first, then add water and lather. Rinse and repeat. Applying shampoo before water helps it lift the oil.
6. Condition as usual. Finish with your normal conditioner on the lengths.

How long should you leave castor oil in your hair?

One to three hours is enough. Many people leave oil on overnight, and that is fine for most hair, but it is not necessary and it can stain pillowcases. If you do leave it on overnight, use an old pillowcase or a towel.

How often should you use it?

Once a week works well for most hair types. Very dry or coily hair may like it twice a week; fine or oily hair may prefer every second week. Using it every day mostly means more oil to wash out.

Should you dilute castor oil?

For most people, yes. Mixing castor oil with a lighter oil, such as extra virgin olive oil, makes it easier to apply, spread and rinse out. That is exactly why Hair Elixir combines three ingredients: pharmaceutical-grade castor oil from Germany, extra virgin olive oil from Italy and lavender oil. The olive oil makes the blend easier to use and adds softness and shine, and the lavender oil gives the weekly ritual a calming scent.

Common mistakes

• Using too much. More oil does not mean more benefit. It only makes washing harder.
• Adding water before shampoo. Shampoo directly on the oiled hair first, then add water.
• Rubbing long hair into a knot. Smooth the oil downwards through the lengths. Do not pile long hair on top of your head and rub, as very long hair can tangle badly.
• Getting it in your eyes. Keep oil away from the eyes, and rinse with water if it happens.

Is castor oil safe for everyone?

Castor oil is widely used in cosmetics. Still, any ingredient can irritate sensitive skin. If you have a sensitive scalp, test a small amount on the inside of your arm 24 hours before your first treatment, and stop using it if you notice redness or itching.

Does castor oil make hair grow?

This is the most searched question about castor oil, so here is an honest answer: there are no robust clinical studies showing that castor oil makes hair grow faster or thicker. What castor oil does well is care for the hair you have. It conditions the lengths, helps reduce breakage from brushing and leaves hair softer and shinier. If you are worried about hair loss, talk to a dermatologist.

Frequently asked questions

Can I use castor oil on colored hair?

Oils do not bleach or remove permanent hair color, but test a strand first if your color is very fresh.

Which castor oil is best for hair?

Look for a pure, high-quality castor oil with a certificate of analysis from the supplier. Pharmaceutical-grade oil is tested against a pharmacopoeia standard for purity.

Can I use castor oil on my eyebrows and lashes?

Yes, many people do. Use a clean brush, apply a very thin layer and keep it out of your eyes. Our Eyebrow & Lash Oil comes in a 10 ml bottle with a brush applicator for exactly this.