How to Blend Palmarosa Oil: Proportions That Work

Palmarosa has a way of taking over. It is sweet, rosy and gently green, and its rosiness is strong enough that a heavy hand will dominate a blend. Blending it well is mostly a matter of measuring in parts, then counting the percent for the whole bottle, then checking the sum on the one ingredient that matters for skin.

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Start by deciding what palmarosa is doing

We class palmarosa as a middle note, and the partners we suggest are geranium, bergamot, ylang ylang, sandalwood, lavender and patchouli. That tells you the job: it is the heart of a blend, not the crown or the anchor. A lighter citrus or lavender lifts it. A deeper wood or patchouli grounds it. Our longer pairing article, what blends with palmarosa oil, goes through partners one at a time. None of those partner oils are ours; you will find them at a craft or aromatherapy supply shop.

Think in parts, then convert to percent

Pick a ratio by drops, with the loudest oil the smallest share. A simple frame is 3 parts palmarosa, 2 parts a supporting floral, and 1 part something light or deep to finish. Then decide the total percent of the whole blend in carrier oil, not a percent per oil. This is where most blends go wrong: three oils at 1% each is a 3% blend, not a 1% blend.

The Tisserand Institute makes the same point about drops: conversion rates that use drops are always approximate, because no two drops of essential oil are the same. A 30 ml bottle at roughly 20 drops per ml holds about 600 drops of liquid, so 1% oil is about 6 drops in total. That is a rough convention, and a scale that reads to 0.01 g is better if you plan to repeat the blend.

A worked example for 30 ml of carrier

For a body oil at 1% total: 3 drops palmarosa, 2 drops geranium, 1 drop lavender, into 30 ml of a carrier oil from a craft supply shop. That is a suggestion built from arithmetic, not a house recipe. We suggest jojoba or sweet almond as a carrier, but any you tolerate will do.

The tally that matters: geraniol

Palmarosa is high in geraniol, which IFRA regulates as a fragrance allergen. IFRA's annex gives typical figures of 82.4% geraniol in palmarosa oil, 17.7% in geranium and 0.48% in lavender. Weighting the example above by drops (and treating drops as equal in weight, which is only approximately true):

(3 x 82.4 + 2 x 17.7 + 1 x 0.48) / 6 = about 47% geraniol in the oil mixture. At 1% oil in the bottle, that is roughly 0.47% geraniol in the finished product.

IFRA's geraniol standard caps geraniol at 0.78% in facial moisturiser, 1.2% in body creams, oils and lotions, and 1.1% in products applied to the face with the fingertips. So 1% passes all three. Double the dose to 2% total, and the same blend gives about 0.94% geraniol: fine for a body oil, over the cap for a facial moisturiser. These are our calculations from typical values, not a measurement of any one bottle. For your own formula, check the IFRA standards for the product type. Our line is 0.5% to 2% in a carrier. We start toward the lower end, and lower again for the face, since a cap can be lower than the top of that range.

Four common mistakes

Counting per oil. Add up all the oils before you compare against a percentage.
Judging by the bottle. The scent in a bottle is far stronger than on skin or in a room. Smell the blend a few minutes after mixing, not straight from the neck.
Adding more after the fact. It is easy to add and impossible to subtract. Make a small batch first.
Using bergamot casually. A cold-pressed bergamot can be phototoxic. Tisserand puts the maximum for sun-exposed skin at 0.4% in the finished product, and notes that bergamot FCF is non-phototoxic.

When you are ready for a specific formula, our pages on dilution by the ounce and roller blends carry the numbers. Patch test any new blend first, as described in our patch test guide.

A good blend is usually one oil you can still identify, with two others steadying it. If you can pick out the palmarosa, you have probably measured well.