How to Grow and Care for a Carob Tree

The carob tree (Ceratonia siliqua), also known as the locust bean tree, is a perennial tree native to the Mediterranean, where it has been cultivated for centuries. It has attractive, leathery, dark-green evergreen leaves, small scented flowers and edible pods. Carob seeds are so consistently similar in weight that they became a standard measure of weight for precious items such as jewels and gold. If a jewel balanced the scales with five carob seeds on the other side, it was said to weigh ‘5 carobs’, which became ‘5 carats’. This figure is still used today, with one carat equal to 200 milligrams.

A carob tree needs a spot in full sun with free-draining soil. Carob trees can grow in a variety of soil types, including sandy or loamy soils, as long as they’re not waterlogged. Carob trees require regular watering, especially during dry periods, to establish strong root systems. Once established, they can tolerate drought conditions. Apply a layer of organic mulch around the base of the tree to retain moisture and suppress weeds. Fertilise the tree annually with a balanced organic fertiliser, to promote healthy growth.

Like many of its cousins in the bean family, the carob tree produces elongated, green pods, which turn brown as they ripen. These pods are the main source of its culinary and commercial value. They contain a nutritious, sweet pulp (rich in fibre, and essential minerals such as calcium and potassium). This can be dried and ground into a fine powder called carob powder, which serves as a natural alternative to cocoa powder and is used in culinary applications such as baking, beverages and confectionery.

Carob syrup, another valuable product derived from the pods, is a