Cambodia Coffee Varieties – Robusta, Arabica, and Excelsa

Introduction: A Diverse Coffee Portfolio

Cambodia cultivates three primary coffee species: Robusta (Coffea canephora), Arabica (Coffea arabica), and Excelsa (Coffea excelsa). Among these, Robusta is the most widespread. This diversity reflects Cambodia's varied terroir and the adaptability of different coffee species to the country's climate and soil conditions.

Robusta: The Dominant Variety

Robusta accounts for the vast majority of Cambodia's coffee production. Farmers favor Robusta because it is highly adaptable and relatively easy to manage.

Key Characteristics of Cambodian Robusta:

• Grown primarily in Mondulkiri on red soils
• Higher caffeine content than Arabica
• More bitter and richer taste profile
• More resilient to pests and diseases
• Requires less maintenance than other varieties

Cambodians traditionally prefer dark, strong coffee made with Robusta beans. The beans deliver a robust punch and offer a delightful balance of smooth nuttiness and strong caffeine content.

The Fine Robusta Revolution

Cambodia's Robusta has achieved international recognition. Mondulkiri Robusta beans processed by KOFI have been classified as "Fine Robusta" by the Coffee Quality Institute (CQI). This certification places Cambodian Robusta in the luxury coffee category.

To achieve Fine Robusta certification, CQI coffee experts carefully evaluate several factors, including aroma, taste, acidity, crust, and balance of the coffee.

Arabica: The Emerging Premium Alternative

Arabica varieties are responsible for only a small percentage of Cambodia's coffee production. However, the variety is gaining attention as Cambodia seeks to diversify its coffee portfolio and attract specialty coffee markets.

Key Characteristics:

• Grown at higher elevations (600–1,000 meters above sea level)
• More delicate and complex flavor profile
• Lower caffeine content than Robusta
• Higher market value in specialty coffee segments

In Mondulkiri, a few farmers' cooperatives, often supported by NGOs or private actors, are testing small plots of Arabica. Initial results show a coffee with fruity, slightly acidic notes – in stark contrast to the mass-produced Vietnamese Robusta.

The Kampot region is also emerging as a producer of Arabica hybrids.

Excelsa: The Rising Star

Excelsa (Coffea excelsa) is gaining attention in Cambodia as farmers look for alternatives to Robusta. Farmers are transitioning from Robusta to Excelsa due to ongoing issues with farming Robusta, particularly the increasing occurrence and severity of diseases, pests (especially black twig borer: Xylosandrus compactus), and drought.

Key Characteristics:

• Grown at elevations of 200 meters above sea level
• Greater climate resilience
• Distinct earthy flavor with unique aroma from forest flowers
• Increasingly used as either an interplanted crop or the dominant species

The Cambodian raw coffee beans market categorizes beans by type, including Arabica, Robusta, Liberica, and Excelsa.

Comparative Overview

TRS1: A New Robusta Variety for Cambodia

KOFI has been propagating TRS1 coffee seedlings, a Robusta variety specifically selected for Mondulkiri's soil and climate. More than 300,000 TRS1 seedlings have been distributed for cultivation across approximately 300 hectares in Mondulkiri Province.

Other Robusta varieties grown in Cambodia include TR4, TR9, and TR5.

The Future of Cambodia's Coffee Varieties

Cambodia's coffee sector is at an inflection point. While Robusta will likely remain the dominant variety due to its adaptability and farmer preference, the growing interest in Arabica and Excelsa reflects broader trends:

1. Diversification – reducing reliance on a single species
2. Specialty market access – premium prices for higher-quality beans
3. Climate adaptation – finding varieties resilient to changing conditions

The Cambodia Coffee Association, established in June 2025, aims to bring together coffee growers, business operators, consumers, coffee machine suppliers, researchers, and cultivation service providers to advance the country's coffee cultivation industry and expand into international markets.

As one expert noted, Cambodia may not be able to compete with the biggest producers such as Vietnam, but the sector has the potential to grow, contribute to the economy, and create jobs for the local workforce. The key lies in identifying the right varieties for each terroir and building a reputation for quality that commands premium prices in the global market.