Petitgrain — Petitgrain EO is an Essential  Oil and not a species; leaves and twigs from any citrus when distilled are called Petitgrain (small fruit) and depending on terroir the scent is different. Includes formulas and recipes.

PETITGRAIN EO &. HYDROSOL
By Jeanne Rose ~ 8-17-19

PETITGRAIN EO —  COMMON NAME/LATIN BINOMIAL ~ Petitgrain is the name of an essential oil and is not a plant species, it is the results of distilling the leaves and twigs of citrus and can be made from any citrus. It is particularly Petitgrain Bigarade from Citrus x aurantium, that is, the leaves and twigs of the bitter Orange. Normally, it is from Citrus x aurantium (L.) but you can also have Lemon Petitgrain, Combava petitgrain, Orange Petitgrain, Mandarin Petitgrain or any kind of petitgrain.

            Family: Rutaceae (the Rutaceae are a family, commonly known as the rue or citrus family, of flowering plants, usually placed in the order Sapindales. Species of the family generally have flowers that divide into four or five parts, usually with strong scents. They range in form and size from herbs to shrubs and large trees.)

            Petitgrain EO — Other Common Name/Naming Information ~ Originally, Petitgrain which means “small fruit” was distilled from the immature and small round green fruits of the bitter Orange and the leaves. Originally only that which was distilled in France from the true bitter Orange could be called Petitgrain but eventually when Paraguay began to produce up to 70% of the world’s supply, any citrus leaf and twig could be called petitgrain. Of course, if you distill the fruits then there will be no mature fruit to eat or preserve.  So eventually, the distillation was limited to the leaves and small branchlets, but the oil is still called Petitgrain.
            Blossoms of the true bitter (sour) orange tree, Citrus x aurantium Linnaeus, subsp. amara L., on being distilled yield Neroli bigarade oil. If, on the other hand, the leaves and petioles (leaf stalk) are distilled, oil and hydrosol of Petitgrain bigarade is obtained and if you cold-press the rind then it is called Bitter Orange oil.

            Petitgrain EO and hydrosol is thus produced from the Bitter Orange tree after the harvest of the flowers (for Neroli); leaves and stalks are freshly picked from July to October and freshly and immediately distilled for the best product. It should be emphasized that American producers wishing to produce Petitgrain oil and hydrosol be very careful as to the citrus variety they use, time of harvesting and the type of distillation.

 PETITGRAIN EO — GENERAL DESCRIPTION OF PLANT HABITAT AND GROWTH ~ Citrus is grown in tropical and subtropical areas, including various southern areas in the southern USA. They are found in sunny, warm areas throughout the world.  The tree is a small evergreen tree, somewhat cold-hardy and tolerant of drought, but if it is Mandarin Petitgrain, then know that the fruit itself is very delicate and sensitive to the cold.  Citrus blooms in winter months and produces small green fruits in spring while fruits ripen in fall. It grows in soil with  a pH of 6 to 8.  They do not, however, grow well in soils with high salt content. Leaves are harvested late June to October for distillation.

PORTION OF THE PLANT USED IN DISTILLATION, HOW DISTILLED, EXTRACTION METHODS AND YIELDS ~ Petitgrain is produced by steam distilling the leaves and small branches of certain citrus trees after the fruit is harvested.  The most important of the Petitgrain oils comes from the Bitter Orange tree. Paraguay is a big producer of Petitgrain from citrus trees gone wild since 1877.  Higher quality Petitgrain comes from France and Italy, sometimes Egypt and Morocco.
            True Petitgrain EO and hydrosol should originate exclusively from the true bitter Orange tree. These distillations show that the oil will have a relatively high laevorotation and the presence of leaves from sweet Orange trees will result in oils of lower laevorotation, or even dextrorotation. (See Orange blog post at jeanne-blog.com)

            The Petitgrain is distilled from the leaves and twiglets when the fruit is pea-sized.

The quality of Petitgrain depends on various factors:
1. The leaf material should originate exclusively from the bitter or sour Orange tree.
2. The leaf material should not contain any wooden branches, nor any small unripe fruit (despite the name and although it was the original Petitgrain).
3. The leaf material should be distilled rapidly and with direct steam that is generated in a separate boiler. The leaves must not be immersed in water, as this will cause hydrolysis of the linalyl acetate which is the most important constituent. Properly distilled the oil and hydrosol will have a high ester content.
4. The plants of Southern France bloom in May and June and these flowers used for Neroli production. While the leaves and petioles for Petitgrain are harvested from the pruning after the Neroli harvest which is from late June to October

            Yields ~ are 0.25-0.5%. 

PETITGRAIN COUNTRIES OF ORIGINS ~: Oil of Petitgrain was originally distilled in Paraguay and is now also distilled in Egypt, France, Italy, Morocco, USA.  However, in Paraguay the plant that is distilled is a hybrid of the sweet and the bitter Orange that has gone wild and thus the oil and hydrosol is considered to be of lower quality.  Main producing areas are the Mediterranean countries of Italy, Corsica, Sicily, etc. and California, Florida and South America, each of these countries produce citrus oils that are organoleptically identifiable.

Gathering Bitter Orange leaves in 1919. Pictures from 1919 Scientific American of the
 Gathering of the leaves of the bitter-orange. For Petitgrain Scent

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EDEN BOTANICALS HARVEST LOCATION ~ Egypt and Morocco

 ENDANGERED OR NOT ~ Not Currently

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ORGANOLEPTIC CHARACTERISTICS

Petitgrain oils. See the different colors of the oil that are available.

ODOR DESCRIPTION/ AROMA ASSESSMENT ~ Petitgrain has a strong, bitter-sweet, floral and somewhat woody odor, sometimes vegetative (not-pleasant), dry and a bit leathery. The woody smell is from the sesquiterpene alcohol, spathulenol.  Aldehydes contribute to the odorous principle, even though they are in small amounts.  Another important constituent is the pyrazines with their Galbanum-like green notes. It is important to mention that the trace components in Petitgrain leads to a good scent and especially in perfumery where they are important or when

 the scent needs to be reconstituted. Petitgrain bigarade is used in perfumes for its refreshing, sweet-floral notes and often as a substitute for Neroli.

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            Learn to Smell and Detect Odor: Limbic system is the seat of memory and learning. Smell from left nostril and then to right nostril. The right nostril (right brain-creative) is important in detecting and evaluating the intensity of odor, and this hints at a broad olfactory asymmetry and the left nostril (left brain or logical) is for smelling location or place.

            First Smell and 2^nd Smell: “Lurking in the olfactory epithelium, among the mucus-exuding cells, are cells that are part of the system that innervates the face (trigeminal nerve).  It is suspected that pungent and putrid molecules penetrate them, interact with their proteins, and stimulate them to fire.  Thus, there are two types of olfaction: first smell, the ordinary type for specific odors, and second smell for nonspecific pungency and putridity.”

            There is also left brain and right brain smell-ability. Left brain smells location (maybe via logical use of EMG waves) while right brain smells intensity. The closer you get – the more intense the odor.

[see the Circular Vocabulary of Odor© at the end for an analyses of Petitgrain sampled]

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CHEMISTRY COMPONENTS OF PETITGRAIN ~ 80% of the yield is made up of linalyl acetate and linaloöl in a proportion of 2:1.  The woody smell is from the sesquiterpene alcohol, spathulenol.  Aldehydes contribute to the odorous principle, even though they are in small amounts.  Another important constituent is the pyrazines with their Galbanum-like green notes. It is important to mention that the trace components in Petitgrain leads to a good scent and especially in perfumery where they are important. The best Petitgrain is distilled from Bitter Orange leaves with noted laevorotation of the molecule, that lovely sour smell that is so fragrant, and not from sweet Oranges where the oil will have a dextro- (sweet) rotation and thus a different odor.

            Physiochemical Properties: The quality of Petitgrain oil can be evaluated by its physicochemical properties. Here are the properties of genuine Petitgrain distilled in Southern France as outlined in Guenther’s work. …

            Comparison of Main Components: The high amount of ester in the form of linalyl acetate lends the fruity odor to the oil while various amounts of the other components lend the personality to each of the different types of Petitgrain. Chemical Components are 80% made up of linalyl acetate and linaloöl in a proportion of 2:1 and limonene, dipentene, citral and others.

            Solubility of Petitgrain Bigarade ~ Soluble in 2.8 to 4.5 volumes of 70% alcohol, rarely with opalescence, but often with some precipitation. — Guenther

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GENERAL PROPERTIES of PETITGRAIN

Antispasmodic, tonic and astringent

Properties and Uses of Petitgrain ~ Inhaled to ease the nervous system and soothe nerves that stimulate the muscles; used in skin care properties for excessive acne, to reduce excessive perspiration and in shampoo and soap for greasy hair and skin. It is a great toner to all body care products. Wonderful in woody or fougére perfumes.

            Can be used as part of an aphid insecticide. Natural essential oils such as coriander oil and petitgrain oil may be useful in the control of foxglove aphid (A. solani). After application of these oils mortality of the pest was significant and amounted to 81.20-99.47% and 89.80-99.50%, respectively (72 hours after treatment).

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            What does Jeanne Rose use this EO for?  I like to take a tablespoon of unscented cleanser or oil and add 1 drop of Petitgrain EO, especially the low-intensity Petitgrain oil, such as Bigerade and mix these and apply to my skin. Then I take a warm washcloth and touch it to my face to warm the skin, and then rinse, rinse, rinse with warm water. My skin feels clean and ready for the day.

            Application/ Skincare: A useful antiseptic, it kills bacteria on the skin and works well in cleansers. It can leave the skin feeling clean and reduces acne.

a Jeanne Rose Recipe for Aftershave Therapy for Men

• 4 drops of Lavender oil
• 4 drops of Bergamot
• 4 drops of Petitgrain
• 3 drops of Atlas Cedar oil
• Make your synergy and succuss.
• Dilute to your specifications or as follows, Add 90 drops carrier oil, lotion or alcohol to dilute to = 12% EO

Diffuse/Diffusion: Petitgrain can be diffused by itself or in any blend. It lends a tart citrus or green quality and the air feels clean. It soothes the nervous system, is antispasmodic and is inhaled for “nervous exhaustion or stress.” — 375 Essential Oils and Hydrosols, p. 127

Emotional/Energetic Use: Inhaled for nervous exhaustion, fatigue or stress. Inhale to wake-up and to be more positive.

PERFUMERY AND BLENDING ~ Petitgrain Blends Best with: Bergamot and all types of Citrus and other Petitgrain citrus, Clary Sage, Clove, Atlas Cedar, Lemon Eucalyptus, Frankincense, scented (Pelargonium) Geranium, jasmine. Juniper CO₂, Labdanum, Lavender, Oakmoss, Palmarosa, Patchouli, all types of Rose, Rosemary, Sage, and any floral, and Ylang Ylang.

BLENDING WITH A JEANNE ROSE FORMULA

Solid Tuberose Perfume Formula #2 – Jeanne Rose 2003
Another Formula is: 1/2 oz. Tuberose wax and 1/2 oz. Lavender infused Oil.  Melt in a 1 oz. jar in a water bath – slowly and carefully. When the wax is melted add the following scents: 15 drops Jasmine, 15 drops Ylang extra, 15 drops Vanilla, 15 drops Petitgrain Mandarin and 3 drops Vetivert. If you have it, you can also add 3-5 drops Tuberose to bring up the caramel scent. Stir gently, let it sit until cool and solid.

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HERBAL USES OF PETITGRAIN AND LEAVES OF CITRUS ~  You make an herbal infusion of the leaves of any citrus tree for a nice relaxing herbal bath and add a few drops of Petitgrain to enhance the scent. This is always a special treat.         

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Key Use: Inhale to soothe panic and use externally for clean skin; that is, inhaled for the nervous system  and use in your body-care products.

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JEANNE ROSE’S “TOMATO TALES” OF PETITGRAIN

~ ORANGE FLOWER AND PETITGRAIN DISTILLATION. At the end of March 2003, I had the opportunity to distill 5 pounds of pure Orange Flowers for Sweet Neroli Hydrosol obtained from organically grown sweet naval Orange, variety Atwood. The balance of the leaves and flowers was then sent to another distiller for the Orange Flower and Petitgrain hydrosol.
            The trees were grown in the foothills edging the great central valley of California near the town of Lindsay. The trees are grown organically, at 500 feet with a west exposure in full sun and the area is certified organic. The area is irrigated via the San Joaquin river. The soil is USDA Porterville cobbly clay. There is about 12 inches of rainfall per year. The harvest was on Wednesday 3/25/03 from about 15 trees. Harvest weather was overcast to full sun, about 75° F and 30% humidity.  It took 3 hours for each of two persons (6 total) to fill 13 five-gallon buckets with twigs and flowers. This was transported to San Francisco and arrived on Thursday. Each tree produced about 1 bucket (3.3 lbs./bucket) of easily available twigs with flowers.  This effectively gently pruned the tree of excess flowers and will leave it able to produce more and tastier Oranges.
            We started with 43 pounds of twiglets that had blossoms and buds attached. It took 3-man hours (1 hour for 3 persons) to pick off the flowers and to accumulate the 5 pounds of just-opened flowers.  The fragrance was sweet, intense, floral and fruity with some green back notes. The balance of the leaves and flowers (38 pounds) was sent to the larger stainless-steel unit, 1-hour north. The leaves were kept above the water and must not be immersed in water, as this will cause the hydrolysis of linalyl acetate. A 4-inch copper tube was added to the gooseneck. Two hours of distillation produced 12 gallons of hydrosol. pH began at 5, the scent being green and citrus and as the distillation continued, pH became more acid to 4.4, the scent becoming more rich, citrus and spicy. 3 ml of essential oil was produced from the 38 pounds of twigs and flowers.

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NOT ORGANIC AND IN THE SMOG ~ This  is only one distillation that I experienced with citrus flowers/or leaves. Another that I did was in southern California where I was invited to an abandoned Orange grove that was left in the middle of a nexus of freeways. The citrus tree leaves were covered with dust, dirt and smog. My students and I (we were 14 in all), cut branches and sat in a circle picking off the leaves and individually dusting and then washing each leaf. It took several hours to do this. I set up my still with a screen inside to lift the leaves up and off of the boiling water and we steam-distilled the freshly cleaned leaves. Petitgrain must be steam-distilled and not hydro-distilled to prevent the hydrolysis of the linalyl acetate which is the most important constituent. Properly distilled the oil and hydrosol will have a high ester content. The smell was spectacular but since the Orange grove was located in the middle of a freeway, I cautioned everyone to smell but not use the distillate.

HYDROSOL ~ In 2003, we distilled 38 lbs. of leaves and twigs of Petitgrain hydrosol. This was a wonderful hydrosol, very fragrant and sweet.  It was used in skin care products and simply as a mister.  Several misting products were produced using the hydrosol. Mixed 50/50 with Spearmint hydrosol produced a very refreshing and fragrant fruity, citrus mint hydrosol. Fabulous to use. If the organic citrus farmers of central California would collect and distill leaves and twigs of their sweet Orange crop, they would have a value-added product in the way of sweet Petitgrain hydrosol.

PLEASE NOTE: A true hydrosol should be specifically distilled for the hydrosol, not as a co-product or even a by-product of essential oil distillation. The plant’s cellular water has many components most are lost under pressurized short steam runs for essential oil, or by using dried material. We recommend that the producers specifically distill for a product by using plant material that is fresh

HISTORICAL USES ~ Petitgrain is used since the 1700s in the Perfumery industry. It lends a citrus woody note to perfumes.

HISTORY & INTERESTING INFORMATION ~ “Petitgrain from Citrus aurantium: Essential Oil of Paraguay” by Daniel Gade — EcoBot 33(1), 1979, pp. 63-71        

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CONTRAINDICATIONS: It is not like other citrus oils as it is steam-distilled and not cold-pressed and thus is not photosensitive. Only contraindications are if you have already sensitivities to citrus oils.

SAFETY PRECAUTIONS: GRAS – generally recognized as safe.

A Snapshot of Petitgrain Odor

Odor Snapshot of Petitgrain sur Fleur and Petitgrain Absolute

Using the Advanced Vocabulary of Odor to describe the scent of Mandarin Petitgrain leaves by Jeanne Rose. For further study with Jeanne Rose and to learn the Vocabulary of Odor enroll in class, April 2020. See /calendar.html

References
Arctander, Steffen. Perfume and Flavor Materials of Natural Origin. Arctander. 1960
Gorski, R., Kania, A. Influence of coriander and petitgrain oils on the mortality of foxglove aphid (Aulacorthum solani Kalt.) occurring on tobacco.
Guenther, Ernest. The Essential Oils. Krieger Publishing. Florida. 1976
Harman, Ann. Harvest to Hydrosol.  IAG Botanics. 2015 (supporter of testing hydrosols)
Herbal Studies Course/ Jeanne Rose. San Francisco California, 1992
Mabberley, D. J. Mabberley’s Plant-Book, 3^rd edition, 2014 printing, Cambridge University Press.
Mojay, Gabriel.  Aromatherapy for Healing the Spirit.  Rochester, Vermont:  Healing Arts Press, 1999.
Rose, Jeanne.  375 Essential Oils and Hydrosols.  Berkeley, California: Frog, Ltd., 1999
Rose, Jeanne.  The Aromatherapy Book: Applications & Inhalations.  San Francisco, California:

Petitgrain absolute ~ lovely perfume ingredient from Eden Botanicals

Originally, Petitgrain EO, which means “small seed” was actually distilled from the immature and small, round green fruits of the Citrus trees.  Of course, if you distill the fruits then there will be no mature fruit to eat or preserve.  So eventually, the distillation was limited to the leaves and small branchlets, but the oil is still called Petitgrain.

~JR~

SOME CAUTIONS TO REMEMBER