The Carob Tree (Ceratonia siliqua)


The Algarrobo tree (Ceratonia siliqua, Carob tree) is very characteristic of the Mediterranean region. The plant is also prolific all over the Middle East, where it has been in cultivation for at least 4,000 years. The plant was known to the ancient Greeks who planted the seeds in Greece and Italy.

The Carob tree provides one of Mallorca’s traditionally most important crops, the algarroba fruit (carob fruit, also known as locust bean).

Carob trees grow well where citrus fruit is grown. They prefer dry climates that receive more than 30 centimetres of annual rainfall. In other words: the Mediterranean-type climate.


During September and October you will see Mallorcan farmers (or their wives) beating long dark carob beans off their trees with long sticks. Unfortunately, in Mallorca over the last few years algarrobo trees are more and more neglected. The cost of manpower is too high nowadays to harvest the carob pods with the wholesale price per kilo of carob beans being as low as 18 Euro Cents. Not worth one’s while really, unless one does the job oneself.

The fruit of carob is a pod, technically a legume of 15 to 30 centimetres in length, fairly thick and broad. Pods are borne on the old stems of the plant on short flower stalks. Carob trees can have both, male and female flowers. The dark-brown pods are eaten directly by livestock (horses, mules, sheep, pigs, goats), but us humans know carob mainly because the pods are ground into a flour that is a cocoa substitute. Good for people who suffer from diabetes, for instance.


The carob bean is widely used as a substitute for chocolate. Although this product has a slightly different taste than chocolate, it has only one third of its calories. It is virtually fat-free (chocolate is half fat), is rich in pectin, is non-allergenic and has no oxalic acid, which interferes with absorption of calcium. Carob is also rich in sucrose (almost 40 %, plus other sugars) and protein (up to 8 %). The pod has vitamin A, several B vitamins, and a number of important minerals. As a consequence, carob flour is widely used in health foods for chocolate-like flavouring.

There are plenty of other uses of carob as well, medicinal, pharmaceutical, cosmetic and industrial.


The seed of the Carob tree is the ancient weight used by goldsmiths in the days of yore to weigh gold and precious stones. The seed of the carob fruit is always of the same weight, hence the word carat (from Ceratonia).

There are references to the carob in the Bible. For example, this plant is also called St. John’s Bread or locust bean because of the pods which were thought to have been the locusts that were supposedly eaten by John the Baptist in the wilderness. Some people think that it is the carob fruit that is referred to in the Bible as the Manna from Heaven, both, for its nutritional value and also for its easy availability.

Mohammed’s army ate kharoub, and Arabs planted the crop in northern Africa and Spain when the Iberian peninsula was invaded by the Moors. The Spanish later carried carob to Mexico and South America, and the British took carob to South Africa, India, and Australia.

~ by plantarium on September 24, 2009.

6 Responses to “The Carob Tree (Ceratonia siliqua)”

  1. […] See the original post here: The Carob Tree (Ceratonia siliqua) […]

  2. This review of the Ceratonia siliqua seems very accurate and complete.

  3. I have just returned from Mallorca with my family. On a Bike ride I came across many of these trees and wondered what they were. Thanks for a great explanation. From what I saw their agriculture seems to be ‘tree dominated’. Judging by what you say I hope they manage to sustain (or preferably develop) this way of farming.

  4. hi, do carob trees have flowers & if so where can i find a picture of them?

    • hi neville,
      separate ceratonia siliqua trees are male, female or hermaphroditic. yes, the female tree has flowers which are small and borne in clusters. you can find pictures on the internet, such as this one: .

  5. Dear friend,
    As you might see in your brother Ron mail, in these days I completed writing a book about the “Flower of the Holy Land”. The book is a guide for Christian pilgrims, with botanical aspects of the plants, along with the religious context of Christian tradition, the New Testament and Jesus in Proverbs. During the collection of materials, I exposed to your website and found an appropriate photo of the Carob tree image. I would be grateful if you allow me to use this photo in my book, of course while maintaining the credit and rights reserve for the photographer, as required by law.
    Sincerely yours,
    Ami Tamir

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