Visitors to Thang Loi Coffee Company after five years are struck by a remarkable transformation across its coffee plantations—a vivid demonstration of crop diversification within coffee plots. Once planted solely for windbreaks and shade, these trees now serve a more ambitious purpose: supporting a profitable second crop—black pepper.
From Shade Trees to Pepper Supports
Table of Contents
Original Role of Shade and Windbreak Trees
Traditionally, these trees were planted in the 1980s to:
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Regulate temperature and light,
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Reduce evaporation, and
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Protect coffee plants during the harsh, rainless dry season.
Transition to Dual-Crop Production
Company leaders decided to maximize productivity by training pepper vines to climb the existing shade and windbreak trees, creating a dual-income system without needing additional land.
Technical Standards for Intercropping
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Each hectare of coffee is planted with four windbreak rows, spaced 25 m apart, with trees 3–5 m apart within each row—about 100–165 shade trees per hectare.
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On a 1,000-hectare coffee estate, that equals 100,000–165,000 potential living supports for pepper vines.
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Farmers also use other living stakes, such as Leucaena leucocephala, which work equally well.
Field observations show that intercropped pepper vines thrive, forming dense canopies over 1 m wide and climbing more than 10 m high.
Economic Impact: Higher Income Per Hectare
Impressive Returns
According to Director Nguyen Xuan Thai, many households growing pepper alongside coffee earned hundreds of millions of VND in 2011.
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With coffee prices at over 40 million VND per ton, a hectare of coffee intercropped with pepper can yield over 200 million VND in total income—double the returns of traditional monoculture.
National Potential
If half of Vietnam’s 250,000 hectares of coffee were intercropped with pepper—assuming at least 100 shade trees per hectare, each producing 2 kg of dry pepper (many examples reach 3–4 kg), and pepper prices around 40,000 VND/kg—then:
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Pepper could generate an additional 2,000 billion VND (~100 million USD).
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This equals roughly 8 million VND extra income per hectare every year.
Agronomic and Ecological Advantages
Key Benefits of Intercropping Pepper in Coffee Fields
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No competition for nutrients: Pepper vines grow at the base of shade trees, not competing with coffee roots.
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No competition for light: The vertical pepper canopy climbs up shade trees without shading coffee plants.
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Shared irrigation: Pepper benefits from the same dry-season watering schedule as coffee.
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Staggered harvests: Pepper is harvested after the coffee season, avoiding labor conflicts.
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Minimal pest overlap: Coffee pests and shade-tree pests rarely affect pepper, and vice versa.
Diversification Beyond Pepper
The model also opens opportunities for farmers to diversify income further by adding other high-value crops such as avocado, durian, or macadamia, and even integrating small-scale livestock such as deer or civet cats.
Using shade and windbreak trees as living stakes for pepper vines is a smart, sustainable farming method that:
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Increases economic returns,
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Preserves ecological balance, and
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Strengthens the long-term sustainability of Vietnam’s coffee sector.
By maximizing every square meter of fertile basalt soil, coffee farmers can secure both economic and environmental benefits, setting a model for sustainable agroforestry in the Central Highlands.