Terroir

Rainy Season at Origin

The rainy season at origin is the period of the year characterized by high precipitation, which triggers coffee tree flowering and supports cherry development, but also presents significant challenges for harvesting and drying.

The rainy season at origin is a defining period for every coffee farm. It is the time when the landscape turns green, the coffee trees receive the water they need to grow, and the cycle of life begins anew with the flowering of the trees. However, for the farmer, the rainy season is a double-edged sword that requires careful management.

During the rainy season, the primary focus is on tree health and soil management. High levels of precipitation can lead to soil erosion, especially on steep hillsides, and can increase the risk of fungal diseases like coffee leaf rust. Farmers must use techniques like cover cropping, terracing, and shade management to protect the soil and ensure that the trees remain healthy despite the heavy rain.

As the season progresses, the rain supports the development of the coffee cherries. However, if the rainy season extends too long or overlaps with the harvest, it can be disastrous. Coffee cherries need dry weather to ripen properly and to be harvested without damage. Furthermore, once the coffee is picked, it must be dried to a specific moisture content. If it rains during the drying process, the coffee can develop mold or other defects, which significantly lowers its quality and value.

For the specialty coffee industry, the timing of the rainy season is a key factor in determining the 'crop year' and the availability of fresh coffee. Roasters and importers track these seasons closely to know when to expect the harvest from different regions. A 'good' rainy season is one that provides enough water for the trees but ends in time for a dry, sunny harvest period.

In practice, the rainy season is a time of intense work and vigilance. Farmers must be prepared to manage the challenges that come with the rain while maximizing the benefits it provides. For the coffee drinker, the rainy season is a reminder of the seasonal nature of coffee. It is a crop that is deeply tied to the rhythms of the earth, and every harvest is a testament to the farmer's ability to work with the climate.

Sources
  • · https://www.sciencedirect.com/science/chapter/edited-volume/abs/pii/B9780128035207000025