
Coffee
Coffea arabica
💡 Fun Facts
- -Coffee is the second most traded commodity after oil
- -A coffee plant can live up to 100 years
Growing Tips
- -Shade trees improve bean quality
- -Mulch heavily to retain moisture
Uses
Economic Information
Coffee isn't just a beverage; it's a global economic powerhouse, impacting millions of lives and shaping national economies. Annually, global coffee production hovers around 160-170 million 60-kg bags, with its market value exceeding hundreds of billions of dollars when considering the entire supply chain from farm to cup. The top producing countries are Brazil, which consistently leads in volume, followed by Vietnam, Colombia, Indonesia, and Ethiopia. These nations, along with many others in the "coffee belt" (the tropical and subtropical regions around the equator), rely heavily on coffee exports for foreign exchange earnings and rural employment.
For countless smallholder farmers, coffee cultivation is their primary source of livelihood. The economic importance extends beyond direct sales, fostering industries like processing, roasting, shipping, and retail. However, the market can be volatile, with prices fluctuating based on supply, demand, climate events, and political stability, posing significant challenges for growers. Despite these complexities, coffee remains one of the most traded agricultural commodities worldwide, a testament to its enduring popularity and critical role in global commerce.
Growing Guide
Soil Preparation
First things first, let's talk about the ground our coffee plants will call home. Coffee (Coffea arabica) thrives in well-drained, rich, volcanic soil, but don't fret if you don't have a volcano in your backyard! The key is good drainage and plenty of organic matter. Aim for a slightly acidic soil pH, ideally between 6.0 and 6.5. If your soil is heavy clay, work in plenty of compost, well-rotted manure, or other organic amendments to improve its structure and aeration. For sandy soils, organic matter will help with water retention. A soil test is always a wise first step to understand what you're working with and what amendments might be needed.
Planting
Whether you're starting from seed or purchasing young seedlings, proper planting is crucial. If using seeds, sow them in well-draining seed trays filled with a light potting mix, about 1/2 inch deep. Keep them warm and consistently moist. Germination can take several weeks, sometimes even months. Once seedlings are about 6-8 inches tall with a few true leaves, they can be transplanted. When moving to their permanent spot, dig a hole twice as wide as the root ball and just as deep. Space your coffee plants about 6-10 feet apart, depending on your pruning system and desired density. Young coffee plants are quite delicate and prefer dappled shade, so consider planting them under taller shade trees or using shade cloths, especially in hotter climates.
Watering
Coffee plants are thirsty, but they absolutely hate "wet feet" – meaning waterlogged soil. Consistent moisture is the name of the game. Water deeply and regularly, especially during dry spells and critical growth periods like flowering and fruit development. The soil should feel moist but not soggy. Check the soil moisture by sticking your finger about an inch or two deep; if it feels dry, it's time to water. Reduce watering slightly during cooler or dormant periods. Overhead irrigation can encourage fungal diseases, so drip irrigation or watering at the base of the plant is often preferred.
Fertilizing
Feeding your coffee plants properly will lead to healthier growth and better yields. Young plants benefit from a balanced fertilizer (e.g., 10-10-10) to encourage root and leaf development. As the plant matures and begins to flower and fruit, switch to a fertilizer higher in phosphorus and potassium to support berry production. Many growers opt for organic approaches, regularly top-dressing with rich compost, worm castings, or well-rotted animal manure. Apply fertilizers around the drip line of the plant, not directly against the stem, and always follow package instructions. A foliar feed can also be beneficial to address micronutrient deficiencies.
Pruning
Pruning is essential for maintaining plant health, managing size, and maximizing yield. There are several systems, but a common one is the single-stem system, where a main stem is allowed to grow, and lateral branches are encouraged. Remove any suckers (new shoots from the base) unless you're aiming for a multiple-stem system. Prune out dead, diseased, or crossing branches to improve air circulation and light penetration. After harvest, "stumping" – cutting back the main stem to a lower height – can rejuvenate older plants and encourage new, productive growth. Regular light pruning throughout the year helps maintain an open canopy and encourages continuous fruit production.
Harvesting
Harvesting coffee is a labor of love, requiring patience and a keen eye. Coffee cherries don't ripen all at once, so hand-picking is the preferred method to ensure only the perfectly ripe, bright red cherries are selected. This usually means multiple passes through the plantation over several weeks. Once picked, the cherries need to be processed quickly. The "wet process" involves de-pulping the cherries, fermenting them to remove the mucilage, and then washing and drying the beans. The "dry process" involves drying the whole cherries under the sun, then hulling them to remove the dried fruit layers. Each method imparts different flavors to the final bean, but both aim to get to the green coffee bean ready for roasting.
Varieties
Typica
One of the original and most classic Arabica varieties, known for excellent cup quality and a clean, sweet flavor, though it typically offers lower yields.
Bourbon
A natural mutation of Typica, originating on Réunion Island, it yields more than Typica and is prized for its complex sweetness and buttery body.
Geisha (Gesha)
A highly sought-after variety, famous for its distinctive floral, tea-like aroma, bright acidity, and often notes of jasmine and bergamot, commanding premium prices.
Caturra
A natural mutation of Bourbon, discovered in Brazil, it's a dwarf variety suitable for high-density planting and known for good yields.
Pacas
Another natural mutation of Bourbon, found in El Salvador, it’s also a dwarf variety known for its good cup quality and some natural resistance to certain diseases.
SL28/SL34
Developed in Kenya, these varieties are renowned for their exceptional cup quality, often exhibiting blackcurrant, citrus, and wine-like notes, and are quite drought-tolerant.
Catimor
A hybrid cross between Caturra and the Timor Hybrid, it offers high yields and strong resistance to coffee leaf rust due to its Robusta genetics.
Companion Planting
Pests & Diseases
Common Pests
Coffee Berry Borer (Hypothenemus hampei)
Tiny black beetles that bore into coffee cherries, particularly the developing beans inside, causing significant damage and loss of quality.
Management: Organically, focus on sanitation (picking up fallen cherries), setting traps with attractants (e.g., alcohol traps), and introducing natural enemies like parasitic wasps. Conventionally, certain insecticides can be applied, though timing is crucial to target the adults before they bore into the cherries.
Coffee Leaf Miner (Leucoptera coffeella)
The larvae of this moth tunnel within the coffee leaves, creating distinctive "mines" or trails, which reduces the plant's ability to photosynthesize, leading to premature leaf drop and weakened plants.
Management: Organically, prune and destroy heavily infested leaves, encourage natural predators, and use neem oil sprays. Conventionally, systemic insecticides can be used, but careful application is needed to minimize impact on beneficial insects.
Green Scale (Coccus viridis)
Small, flattened green insects that attach to stems and undersides of leaves, sucking sap and weakening the plant, while excreting honeydew that encourages sooty mold.
Management: Organically, spray with horticultural oil or insecticidal soap, and encourage natural predators like ladybugs and parasitic wasps. Conventionally, certain contact or systemic insecticides can be effective.
Common Diseases
Coffee Leaf Rust (Hemileia vastatrix)
Symptoms: Begins as small, yellow-orange powdery spots on the underside of coffee leaves, which then expand and turn a bright orange. Infected leaves eventually turn brown, curl, and drop prematurely, leading to defoliation and reduced yield.
Treatment: Prevention is key: plant resistant varieties, ensure good air circulation through proper pruning, and apply copper-based fungicides (suitable for organic farming) or synthetic fungicides as a preventive measure during periods of high humidity and rainfall. Maintain good plant nutrition to boost natural resistance.
Coffee Berry Disease (Colletotrichum kahawae)
Symptoms: Characterized by dark, sunken lesions that appear on green coffee berries, often starting at the stem end. These lesions expand, causing the berries to rot, shrivel, and drop prematurely, leading to significant crop loss.
Treatment: Use resistant coffee varieties. Implement strict sanitation practices, removing and destroying infected berries. Prune regularly to improve air circulation within the canopy. Fungicide applications, both organic and conventional, can be effective when applied preventatively during the susceptible stages of berry development.
Root Rot (various fungi, e.g., Rosellinia, Fusarium)
Symptoms: General decline of the plant, starting with yellowing and wilting of leaves, stunted growth, and eventually the death of the entire plant. When inspected, the roots will appear discolored (dark brown or black) and may be mushy or brittle.
Treatment: Primarily a soil-borne issue, prevention is critical. Ensure excellent soil drainage and avoid overwatering, as waterlogged conditions favor fungal growth. If possible, plant resistant rootstocks. Remove and destroy infected plants immediately to prevent spread. Soil solarization or fumigation can be used in severely affected areas before replanting.
Nutrition
Per 100g edible portion
History
Ah, coffee! The story of this beloved bean begins far from our modern kitchens, nestled in the ancient highlands of Ethiopia. Legend has it that a goat herder named Kaldi noticed his goats became unusually energetic after munching on the bright red berries of a particular bush. Curious, he tried them himself and felt an invigorating surge, leading him to share his discovery with a local monastery. The monks initially disapproved, casting the beans into a fire, but the enticing aroma that wafted from the flames led them to retrieve and brew them. They found that drinking this concoction helped them stay awake during long hours of prayer. And so, coffee’s journey began.
From Ethiopia, coffee made its way across the Red Sea to Yemen, likely around the 15th century. Here, Sufi mystics were among the first to cultivate it systematically, using it to aid in their spiritual practices and extended vigils. Mocha, a port city in Yemen, became the epicenter of the coffee trade, holding a near-monopoly for centuries. The beans were carefully guarded; only roasted or boiled beans were allowed to leave the country to prevent germination, ensuring Yemen remained the sole producer.
The secret, however, couldn't be kept forever. Around the late 17th century, a legendary Indian pilgrim named Baba Budan is said to have smuggled seven fertile coffee seeds out of Yemen by strapping them to his belly. He planted them in the Chandragiri hills of Karnataka, India, breaking the Arabian monopoly and setting the stage for coffee cultivation to spread beyond its original confines. The Dutch, with their vast trading empire, were instrumental in its further dissemination, establishing plantations in their colonies like Java (Indonesia) and Ceylon (Sri Lanka).
By the 17th century, coffee had reached Europe, where coffee houses quickly became bustling centers of intellectual and social life, earning the nickname "penny universities." From Europe, the plant made its way to the Americas. A French naval officer, Gabriel de Clieu, is credited with bringing a single coffee seedling to Martinique in 1723 under perilous conditions, carefully nurturing it throughout his voyage. From this one plant, much of the coffee in the Americas is said to have descended, transforming economies and cultures across the New World and cementing coffee’s status as a truly global phenomenon.
Community Tips (2)
In the Eje Cafetero, we always plant our coffee under guamo trees. The shade keeps the beans developing slowly, which gives them better flavor.
For broca (coffee borer beetle), we use traps made from plastic bottles with a mix of ethanol and methanol. Check them weekly.
Quick Facts
- Difficulty
- Intermediate
- Climate
- tropical, subtropical
- Origin
- Ethiopia, East Africa
- Harvest
- 3-4 years to first harvest, annual thereafter
- Water
- moderate
- Sun
- partial-shade
- Soil
- Well-drained volcanic soil, pH 6.0-6.5
- Spacing
- 2-3m between plants
- Temperature
- 15-24C (60-75F)
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