Climate Change Disrupts Traditional Coffee Farming in Karnataka
In the historic coffee-growing regions of Kodagu, Chikkamagaluru, and Hassan, planters are witnessing a fundamental shift in agricultural patterns. The familiar seasonal calendar that once guided coffee cultivation has become increasingly unreliable, forcing growers to confront the tangible impacts of climate change on their livelihoods.
Unpredictable Weather Patterns Challenge Traditional Varieties
Jacob Mammen, managing director of Badra Estates, explains that climate change is already significantly affecting the cultivation of traditional coffee varieties like Arabica and Robusta. The biggest challenge comes from increasingly unpredictable weather patterns, particularly the timing and intensity of rainfall, he emphasizes.
Coffee plants depend on specific rain patterns for successful flowering and fruit development. Traditionally, an initial rain shower triggers flowering, followed by a backup shower about two weeks later that helps flowers set properly. However, recent years have brought erratic conditions—either excessive rainfall, insufficient precipitation, or rain arriving at completely wrong times.
This disruption of the flowering cycle directly impacts yields. Extreme weather events are becoming more frequent, with Jacob noting that hailstones last year destroyed coffee flowers on his estate, wiping out crops in affected areas. Unseasonal rains create additional harvesting and quality challenges.
Early showers, sometimes as early as January, can cause new flowers to open while ripe cherries remain on the plant, Jacob explains. When this happens, pickers must stop harvesting to avoid damaging fresh flowers. Simultaneously, rain can cause ripe cherries to deteriorate or dry out, affecting bean quality.
Exploring Climate-Resilient Alternatives
Against this challenging backdrop, interest is growing in climate-resilient varieties like Liberica coffee. Traditionally treated as a fence-line crop rather than a main plantation variety, Liberica is now being reconsidered for its natural advantages in a warming world.
Coffea liberica demonstrates several characteristics that make it more climate-resilient than Arabica:
- Higher temperature tolerance and better performance in hot, humid tropical environments
- Deep, extensive root systems accessing water from deeper soil layers during droughts
- Greater resistance to diseases like coffee leaf rust
- Larger, sturdier trees that withstand heavy rainfall and storms
- Ability to grow in poorer soils and adapt to changing environmental conditions
At Badra Estates, Liberica remains primarily grown as tree coffee along boundaries, but the estate is beginning to rethink this approach as climate challenges intensify.
Market Demand and Production Challenges
Market factors are also driving renewed interest in Liberica. According to Jacob, buyers in India and overseas are increasingly curious about the variety due to its distinct fruity and sweet flavor profile, which differs significantly from Arabica and Robusta.
However, Liberica faces production challenges. Its current yield is significantly lower than traditional varieties, partly because it's still largely grown as a tree crop rather than a fully managed plantation variety.
Excelsa: Another Promising Alternative
Another tree coffee variety gaining attention is Excelsa, generally considered climate-resilient and sharing many hardy traits with Liberica. Excelsa tolerates high temperatures, irregular rainfall, and humid tropical conditions better than the more climate-sensitive Arabica.
Adhi Savla, senior manager for Coffee Community at Blue Tokai, notes they source Excelsa from South Indian Coffee Company, though it's currently sold out. The quantity is very low as they are experimental lots, he says. Excelsa offers a heavier body with distinctive cola-like notes, often reminiscent of cola, black currant and molasses, making it a unique experience for coffee drinkers.
Akshay Dashrath, co-founder of South Indian Coffee Company and a fifth-generation coffee grower, explains their work with Kew Gardens in the UK has proven Excelsa and Liberica are different species. He highlights recent weather extremes: In 2024, we had 65 inches of rainfall on our farm. That is normal historically, but what was abnormal was that 33 inches of that came in a single month of July. These conditions are hard for Arabica and Robusta to tolerate. Excelsa does well in these variable conditions because it is a deep-rooted tree.
Their Mooleh Manay Estate in Coorg produces about three tonnes of clean Excelsa annually. SICC has begun breeding Excelsa, recognizing that while Arabica has benefited from 500 years of selective breeding and Robusta from 150 years, Excelsa and Liberica have had essentially zero selective breeding in India.
Practical Adaptation Measures
For many growers, adaptation currently focuses less on breakthrough genetics and more on practical mitigation. Arvind Rao, former chairman of the Karnataka Planters' Association, explains: Most of us have not really tried climate-resilient varieties because there are not any real varieties available as of now, even from the Coffee Board. So we are managing whatever plants that are already there in our fields.
The current response emphasizes infrastructural and ecological approaches:
- Water conservation through storage tanks and irrigation systems
- Shade regulation to maintain slightly higher shade levels, reducing temperatures despite some crop reduction
- Soil health improvement through composting and organic matter incorporation to enhance water retention
Beyond Resilience: Quality and Processing Considerations
From a quality and market perspective, resilience represents just one layer of consideration. Binny Varghese, a processing expert who has traveled extensively across coffee regions, observes that established varieties like S795 (an Arabica selection with Liberica ancestry) and Selection 9 (developed in India) remain significant.
Genetics define potential yield and disease resistance, Binny explains. Processing determines how much of that potential translates into cup quality.
Data-Driven Climate Risk Management
Conversations around climate risk have become markedly more direct and data-driven. Younger producers are using modeling to track irregular blossom showers, temperature spikes during fruit development, and unexpected rain during drying—all factors affecting bean density and fermentation predictability.
What's interesting is that adaptation is no longer seen as just 'plant a new variety', notes Binny. It's integrated thinking—canopy management, spacing, moisture management, selective picking, even adjusting processing styles to handle inconsistent ripeness.
As Karnataka's coffee industry navigates these unprecedented challenges, growers are developing multifaceted strategies combining resilient varieties, practical adaptation measures, and sophisticated processing techniques to ensure the future of India's coffee cultivation in a changing climate.
