Tunisia is characterised by a rich diversity of plant species, both herbaceous and woody, which play an essential role in environmental protection, biodiversity conservation, soil preservation, erosion control, and desertification mitigation. These ecosystems also provide a wide range of ecosystem services, including provisioning (food and feed), regulating (climate and soil functions), and cultural services linked to rural heritage and identity. Within this context, the carob tree stands out as one of the most important native Mediterranean species, deeply rooted in the country’s natural and agricultural heritage.
The carob tree in Tunisia is considered an ancient species, present since the Carthaginian period. Historical and ethnobotanical evidence suggests that Phoenicians and indigenous Berber populations contributed to its spread across mountainous and semi-arid landscapes, where its pods were traditionally used for food, animal feed, and flour production. Today, it remains widely distributed across the north-western regions, central Tunisia, and Cap Bon, often forming part of traditional agro-silvo-pastoral systems.
Ecological and economic value of the carob tree in Tunisia
It is a highly resilient and multifunctional tree, well adapted to calcareous soils, drought conditions, and water scarcity. Its deep root system and evergreen canopy contribute to soil stabilisation, microclimate regulation, and landscape resilience. These characteristics make it a key species for combating desertification, restoring degraded land, and supporting climate change adaptation strategies in Mediterranean drylands. Its ecological importance, combined with its socio-economic potential, explains the renewed national and regional interest in its conservation, domestication, and expansion.
The Tunisian carob (“kharroub”) represents an important natural, cultural, and economic resource. It is widely valued for its nutritional and health properties and is commonly used in traditional summer and Ramadan beverages, which remain part of both urban and rural food culture. It is also increasingly recognised as a healthy alternative to cocoa and refined sugar, particularly through the production of carob molasses (“rub kharroub”), a traditional natural sweetener.
Its main products include refreshing carob juice, carob molasses used as a natural sweetener in both traditional and modern diets, and carob powder used in pastries, bakery products, and functional foods. Carob is naturally caffeine-free and gluten-free, and its high fibre content gives it functional properties that make it suitable for health-oriented diets and food innovation. From a nutritional perspective, it is associated with improved digestive health, better glycaemic control, and cholesterol regulation, making it relevant for preventive nutrition strategies.
Beyond its pulp, carob seeds constitute an important industrial resource. They are used for the extraction of locust bean gum (E410), a natural hydrocolloid widely used in the food industry as a stabiliser and thickener, as well as in pharmaceutical and cosmetic applications. This adds significant value to the carob value chain and highlights its potential in bio-based and circular economy approaches.
Cultural heritage and historical significance
From a historical and cultural perspective, the carob tree has been deeply integrated into Tunisian rural life and knowledge systems. The term “Kharrouba” has historically been used as a traditional unit of land measurement, referring to the surface area required for planting a carob tree in some rural areas, reflecting the close link between agricultural practice and local knowledge systems.
The word “Kharrouba” was also associated with historical monetary systems during the Husaynid period. Around 1728, Tunisia used gold “Sultani” coins and silver “Rial” coins (also called “Nasri”), subdivided into copper “fals”, reflecting a structured pre-modern economic system in which local agrarian references were integrated into daily exchange practices and systems of valuation.
The term “kharrouba” also appears in Tunisian administrative and fiscal culture, historically linked to municipal taxation practices and popular expressions such as “zabala w kharrouba”, illustrating how agricultural terminology became embedded in socio-economic governance and collective memory.
In addition, several places across Tunisia carry the name “El Kharouba”, reflecting the strong geographical anchoring of this species in the national landscape. These include El Kharouba (Bizerte), El Kharouba (Bou Argoub – Nabeul), El Kharouba (Hammamet – Nabeul), and El Kharouba (southern Siliana). These toponyms highlight the long-standing relationship between the species, land use patterns, and the formation of rural identity.
In Tunisian popular heritage, the carob tree and its products occupy a vivid symbolic place in oral traditions, pastoral poetry, and folk songs, where they are associated with shade, hospitality, gathering spaces, and rural life. Carob-based drinks and sweets also played a central role in the old medinas, where street vendors used rhythmic chants that became part of collective urban memory and intangible cultural heritage.
Contemporary relevance and future potential
The carob tree also remains deeply present in Tunisian artistic memory and contemporary culture. One notable example is the song “Erriq Roub” by Tunisian artist Imen Cherif, which draws inspiration from cultural practices and traditional rhythms such as Hadhra, Ziara, and Stambeli, highlighting the emotional connection between carob products, particularly “rub”, and Tunisian cultural memory.
Carob is also reflected in contemporary cultural expressions, reinforcing its role as both a natural and symbolic resource. It continues to serve as a marker of rural identity, intergenerational memory, and Mediterranean lifestyle.
From a development perspective, despite its importance, the carob tree faces challenges such as overgrazing, forest degradation, and limited valorisation of its value chain. However, Tunisia is witnessing increasing efforts to rehabilitate and promote this species through reforestation programmes, nursery development, and the expansion of grafted, high-yield varieties that offer improved productivity under low water requirements. These initiatives are increasingly aligned with agroecological transition, and sustainable rural development strategies.
From a research and agroforestry perspective, the carob tree is gaining renewed attention as a strategic Mediterranean species for ecosystem restoration, climate resilience, soil rehabilitation, and the diversification of dryland farming systems. Its multifunctionality makes it a key candidate for integrated agroforestry systems combining ecological and economic benefits.
One fascinating international fact is that the word “carat”, used worldwide as a unit of measurement for gemstones, originates from the uniform weight of carob seeds, which were historically used as a natural and highly consistent reference standard.
This article was originally written by Mokhtar Baraket, Associate Professor at the National Institute for Research in Rural Engineering, Water and Forestry (INRGREF), Tunisia.
