Carob – Herb of the Month

The Herb Society of America Blog

by Maryann Readal

Minolta DSCHave you heard of St. John’s bread or locust bean? These are all names for the carob tree, Ceratonia siliqua. This herbal tree is a native of the Mediterranean region and is also grown in East Africa, India, Australia, and California. It can grow in USDA Plant Hardiness Zones 9-11 – places with dry, Mediterranean-type climates. Carob is disease and pest resistant, tolerates dry, poor, rocky soils, and is drought tolerant due to a very deep taproot (125 feet) that enables the tree to survive in arid climates. It is in the pea family (Fabaceae), and like other members of this family it fixes nitrogen, improving the fertility of the soil in which it is planted.

Carob is a multi-stemmed, evergreen tree that can reach 50 feet high and 50 feet wide, and its broad, dark green leaves make it a good shade tree. It is…

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