Do you mix your own blends for a diffuser, create homemade oil perfumes or roll-ons, but the result often doesn't meet your expectations? Sometimes the scent fades before you can sit down in a chair, other times it feels heavy and flat, even if you've used the highest quality ingredients. The problem is often not in the quality of the oils, but in the way you combine them. In order for your fragrant creations to have depth, develop beautifully and last longer than a few minutes, they must have a solid structure. This structure is called the olfactory pyramid.
What is the olfactory pyramid?
Think of a perfume or diffuser blend as a building. To be stable and comprehensive, it needs a solid foundation, a supporting structure, and a roof. In perfumery terminology, these three layers are called the Head, Heart, and Base. This division is not just poetic, but is based on the volatility of individual essential oils, i.e. how quickly their molecules evaporate into space.
Let's break down the individual levels of this imaginary pyramid.
1. Head (upper notes) – First contact
The top notes represent the lightest and most volatile notes. It is the scent that you smell immediately after opening the bottle or after the first spray of the perfume (after the alcohol has evaporated). Its task is to captivate, refresh and provide an immediate impression.
Character: Light, fresh, energetic, very volatile.
Durability: The scent is intense, but short-lived. It usually dominates the first 15 minutes, but depending on the type of oil, it can be noticeable for up to 2 hours.
Which essential oils belong here:
Most citrus fruits: Orange, Lemon, Bergamot, Grapefruit, Mandarin
Fresh aromatic herbs: Mint, Lemon Balm, Eucalyptus, Basil, Lavender, Thyme, Tarragon
Some flower oils: Neroli, Mimosa
Some spicy oils: Black pepper, Ginger
Some trees (more likely conifers): Pine, Cypress, Juniper, Rosewood
Tip for practice: If you need an instant boost or a quick air freshener, reach for oils from the “Head” category. However, they evaporate quickly in a diffuser, so it’s a good idea to “anchor” them with oils from the lower levels of the pyramid if you want the scent to last longer in the space.
2. Heart (middle notes) – Character of the fragrance
Once the initial intensity of the head wears off, the heart comes in. It is a significant component that gives a perfume or blend its true identity and character. The heart creates a harmonious transition between the light opening and the heavy base. Without it, the fragrance would feel disjointed and flat.
Character: Full, harmonizing, often floral or spicy.
Durability: It usually fully develops 20-30 minutes after application and the scent lasts for 4 to 6 hours.
Which essential oils belong here:
Flower oils: Magnolia, Jasmine, Frangipani, Ylang Ylang, Tuberose, Rose, Iris, Mimosa, Violet, Osmanthus
Spicy oils: Cinnamon, Cloves, Cardamom
Some herbs: Clary Sage I Clary Sage, Geranium, Rosemary, Lemongrass, Palmarosa, Litsea cubeba, Roman Chamomile
Tip for practice: The heart is key to the emotional impact of the blend. It is here that we find the oils that affect mood the most, rose for opening emotions, lavender for calming (often at the border between the head and the heart) or cinnamon for a feeling of warmth and security.
3. Base (undertones) – Depth and fixation
Base notes are the heaviest, least volatile, and longest-lasting. They form the essence of the perfume itself and act as a fixative – holding the lighter molecules in the head and heart so they don’t evaporate as quickly. The base is what you smell in a room hours later, or on your clothes the next day.
Character: Heavy, earthy, woody, balsamic, sweet.
Durability: They come on very slowly, but they last on the skin or in space for 6 or more hours, and in some cases (on clothes) for days.
Which essential oils belong here:
Wood oils: Cedar, Santal wood, Palo Santo
Resin: Frankincense, Myrrh, Balsam of Peru
Earthy tones: Patchouli, Vetiver, Frankincense, Gunpowder, Cistus
Exotic and sweet tones: Vanilla, Benzoin
Tip for practice: If you want a blend for meditation, deep relaxation, or quality sleep, choose oils from the base of the pyramid. These scents tend to ground and calm us.
How to use the pyramid when mixing?
When creating your own blend for a diffuser or home perfume, try to represent all three layers. This will ensure that the scent will have its own development and will not seem monotonous.
To start, you can try the ratio:
30% Head : 50% Heart : 20% Base
Example of a balanced composition:
Orange (Head) – brings joy and lightness
Cinnamon (Heart) – adds warmth and character
Incense (Base) – adds depth and ensures that the scent doesn’t fade away immediately
In the category of base we often also find absolutes, e.g. VanillaThese substances, obtained by a method other than steam distillation, are often denser and more fragrant. They give the compositions that professional, “perfume” and luxurious touch that you can’t achieve with regular citrus oils.
Knowing the olfactory pyramid will allow you to better select oils and create blends that will not only smell beautiful, but will also have the desired intensity and durability.
Take a look our essential oils offer a absolute and try to build your own scent pyramid.
