Clove

Clove is grown mainly by smallholder farmers in a small number of tropical producing regions, often as part of diversified tree-crop systems alongside other spice and plantation crops.

Because harvesting relies on hand-picking individual flower bud clusters, clove production remains a labor-intensive crop, closely tied to the seasonal timing of bud development.

Family

Myrtaceae (myrtle family)

Genus

Syzygium

Principal species

Syzygium aromaticum

Growth habit

Evergreen tropical tree with pyramidal habit, producing clusters of aromatic flower buds at branch tips

Clove is native to the Maluku Islands (the historical Spice Islands) of what is now Indonesia, where it was a highly prized trade commodity for centuries before its cultivation spread to other tropical regions.

Indonesia, Madagascar, and the island of Zanzibar in Tanzania are today among the leading producing regions. Production and trade figures are compiled by FAO and national agricultural agencies.

Clove requires a warm, humid tropical climate with well-distributed rainfall and has essentially no tolerance for frost, restricting cultivation to consistently warm coastal and lowland tropical zones.

Deep, well-drained loams and sandy loams support healthy root development. Poorly drained sites increase the risk of root disease, a significant limiting factor in clove cultivation.

• Establishment from seedlings, since clove is generally propagated by seed rather than vegetative methods
• Wide spacing to accommodate the tree’s eventual size and to maintain airflow around the canopy
• Intercropping with other tree and spice crops in some traditional smallholder systems
• Long juvenile period before trees reach significant bud production, requiring sustained management over many years

Nitrogen supports canopy growth central to bud production, while potassium contributes to overall tree vigor and bud development across harvest seasons.

Clove is grown predominantly under rain-fed conditions in consistently humid tropical regions with well-distributed rainfall throughout the year.

Supplemental drip irrigation is used in some newer plantings, primarily to support establishment of young trees before they reach full bearing.

Root rot can weaken or kill trees on poorly drained sites, and anthracnose can affect leaves and young shoots under humid conditions. Mealybugs and aphids are common sap-feeding pests affecting foliage and young growth.

Flower bud clusters are hand-picked while still tightly closed, before the flowers open, and are then dried in the sun over several days until they reach the dark brown color and moisture content required for storage and sale.

• Whole and ground dried flower buds used as a culinary spice
• Clove oil extracted from buds, leaves, or stems for the flavor and fragrance industries
• Use in spice blends and traditional cigarette manufacturing in some countries
• By-products such as clove stems and leaves used in lower-grade oil extraction