Pepper & spices: Extraction

Why a pepper vine is a long-term investment

Black pepper comes from Piper nigrum, a perennial climbing vine of the humid tropics. Vines are trained up poles or living trees and bear for many years after a few years of establishment. Spikes of berries are picked by hand, mostly by smallholders. Sun-drying the green berries turns them black and wrinkled. White pepper is made by soaking ripe berries and removing the skin. Exporters clean, grade and often steam-sterilise the pepper to meet food-safety rules abroad, and processors extract oleoresin for food manufacturers.

Spices are many small crops grown mostly by smallholders in the tropics and in India's semi-arid west. Two production models matter for pepper, the largest traded spice. India and Indonesia grow pepper on vines climbing shade trees in mixed homesteads, with yields of about 0.4 t/ha. Vietnam and Brazil grow it in intensive monoculture on posts with irrigation and fertiliser, with yields of 2.7-2.9 t/ha (FAOSTAT 2024). Cardamom grows under forest shade in the Western Ghats and in Guatemala. Seed spices such as cumin and coriander are winter field crops in Gujarat and Rajasthan. After harvest, value is added by drying, cleaning, sterilising, grinding and solvent extraction.

Methods compared

How each method works

Vines climb live standards such as silver oak or areca palms among coffee, coconut and other crops. Inputs are low and picking is by hand. Low yields reflect old vines, disease (foot rot) and mixed cropping.

Diversified, low-input farming, but yields are far below Vietnam's and costs per kg are high.

Vines are grown on concrete or wooden posts in dense rows with drip irrigation and heavy fertiliser. Vietnam's Central Highlands planted rapidly in the 2000s and 2010s, raising national output from 11 kt in 1990 to 262 kt in 2024 (FAOSTAT).

Lowest-cost bulk pepper, but monoculture is prone to disease and boom-bust planting.

Cardamom is planted under thinned forest canopy, harvested every few weeks in season, then dried in curing houses. Guatemala grows mainly for Gulf export; India grows for home use and premium export.

High value per hectare, but output swings with monsoon rainfall and Guatemalan crops.

Cumin, coriander and fennel are sown after the monsoon and harvested in spring; chilli is grown on irrigated black soils around Guntur. These are annual crops, so area responds quickly to last season's price.

Quick supply response, but prices swing widely year to year.

Kochi and other hubs clean, steam-sterilise and grind spices, and extract oils and oleoresins with solvents. Indian extractors import pepper, chilli and other raw spices to process and re-export.

High value added and steady demand from food makers, but needs strict quality control.

Who does it: global

Who does it: India

India is the largest spice exporter, with $4.45 billion of exports in 2024-25, and supplied 29.3% of world HS 0904 (pepper and capsicum) export value in 2024 (PIB; UN Comtrade). It is also a large importer (5.6% of HS 0904 import value), bringing in pepper and chilli to process. The Spices Board regulates 52 spices and runs eight crop-specific spice parks; its SPICED scheme has an outlay of Rs 422.30 crore to 2025-26 (PIB, May 2025).