LEARNING

SEED TO CUP

The journey of coffee matters. How it gets from a farm to your cup is an intricate and important process. The coffee industry is a huge business that can both taste good and do good. Most large coffee shops don’t take the time and energy to source their beans ethically. Learn more about how we support farmers and people around the globe.

THE PLANT

  • Most coffee plants begin in a nursery. Seeds are planted and the resulting seedlings are raised with care until they can be replanted into production.

  • When coffee trees first sprout, the bean itself is lifted through the soil and sits on the top of the stem. This is called a soldier. The bean finally bursts open and out of it comes the plant’s first leaves. Somewhere between 6-12 months later, the trees are ready to move into production, but they will likely not yield a harvest for another three to five years.

  • Coffee trees usually produce one main harvest per year, though in some countries with heavy rainfall, a second harvest is possible. A second harvest usually is of lower quality and quantity than the main harvest. The cycle of producing a crop first begins with a prolonged period of rainfall. The prolonged rainfall causes the trees to bloom, producing many white blossoms.

  • The blossoms are often pollinated by bees and other insects, though this is not always the case. Coffea Arabica is a self pollinating plant, meaning that all of the blossoms on the tree will always produce fruit. The fruit produced by the coffee tree takes up to nine months before it is ready to be harvested, and the fruit does not ripen uniformly.

the process

  • Due to the fruit not ripening uniformly, farmers have to choose between mechanically harvesting the coffee, strip picking it, or paying pickers to only pick ripened berries. All of these options have pros and cons, both financially and in regards to quality.

    Machine harvesting is done by driving a machine down the rows of planted coffee trees. The machine shakes the trees and as it goes by, it knocks the fruit off from the tree.

    Benefits: cost-effective, but not quality-effective. Mechanically harvesting results in underripe, ripe and overripe cherries. These must then be sorted out along with the foliage that is also knocked out of the trees by the machine.

    Mechanical harvesting is not even an option for most farms because so many are located on parts of mountains where the slope is too steep to drive these harvesting machines. One place where it is used extensively is in the country of Brazil. Many large farms in Brazil are located on a plateau and so they are at an elevation where they can grow coffee, but the incline is not too steep that they cannot mechanically harvest.

    On most other farms, because the slope is too steep and the terrain too hilly, the cherries must be harvested by hand. Strip picking is one of the ways by which coffee is hand picked. Strip pickers remove all of the cherries on a branch with one movement. This is similar to mechanical harvesting in the sense that it is quick, as well as imprecise. Just as with mechanical harvesting, strip picking yields many under and over ripe berries.

    The other option farmers have is another form of hand picking. Farmers may pay pickers to go through and pick only the fully ripened berries, leaving the rest to continue to ripen on the tree. Pickers will have to make multiple passes through the harvesting period, sometimes even multiple a day. This is a very tedious, time consuming and costly way to harvest coffee, but it without a doubt produces a higher quality harvest than the other two previously mentioned methods.

  • After harvesting, the coffee is sorted to remove any over or under ripe cherries. This is done in a few different ways. The first of which is by hand. Workers sit and sort out the under or over ripe cherries. This is more common in countries where labor wages are low. The other way of sorting is by use of a flotation tank. The cherries are put in a large tank of water and the ripened cherries sink to the bottom and continue on to be processed. The under ripe cherries float to the top of the tank and are skimmed off.

  • The most common method used is called washed or fully washed process.

    The washed process starts off by what is called depulping or wet milling the coffee. Wet milling machines squeeze the cherries, forcing out the seed from the fruit rind, and separating out the rind. After wet milling there is still fruit left on the seed called mucilage.

    To remove the mucilage, the seeds are placed in large troughs of water called fermentation tanks. In the fermentation tank, defected seeds float to the top and are skimmed off. The rest of the seeds ferment in the tank to break down the mucilage. After properly fermenting, the seeds are then removed from the tanks and rinsed to remove any remaining mucilage and are then ready to be dried.

  • In order to be stored and shipped without molding, coffee has to be dried down to a moisture content of roughly 11%. Most coffees produced around the world are dried in the sun. Coffees dried in the sun utilize either a raised sun-bed (most often seen in Africa) or a patio on the ground (most often seen in Latin America.) In some counties where it is too wet to dry coffee in the sun, beans can also be mechanically dried, though machine drying is considered to be inferior to sun drying. This is because slower drying upholds the desirable flavors better, and sun drying takes longer than machine drying. Patio drying is believed to be much faster than raised beds, because of the heat that the patio holds and is therefore considered to be inferior to raised beds.

the arrival

  • After the dry mill, coffee is packaged typically in some form of proper storage- either a material called jute, GrainPro, or in a vacuum sealed plastic which ensures quality and safety from the elements. Once properly packaged and sold, it is loaded and shipped to roasters and green buyers all over the world, mostly on large cargo ships. These environments are not heavily climate controlled, requiring these beans to be packaged to ensure protection from the elements and kept safe on the journey.

  • After arriving to the buyer, the coffees are evaluated primarily by cupping. Roasters evaluate the coffee by sight, smell, and taste. When they are cupping coffees, there are seven major attributes being assessed: aroma, acidity, balance, flavor, sweetness and finish. Tasters will also be looking for defects in the coffee as well, the last stage of verifying the quality of the product.

  • Roasting is the process that takes coffee from being a seed to what is commonly referred to as a coffee bean. In the specialty coffee industry, we often see coffee roasted in what is called a drum roaster. These roasters work simply by rotating a metal drum over a flame. The rotating drum keeps the beans in motion helping to promote an evenness of roast throughout the seed and lowering the chance of scorching the beans. Drum roasters also take a bit longer than other roasters and the process brings forth some different variables.

  • Roasted coffee beans are then ground in order to brew coffee. The grind setting one chooses is entirely dependent on the brew method they are using and the amount of liquid coffee they are making.

  • Ground coffee is then brewed, usually using hot water in accordance with a recipe made up of a specific ratio of water to coffee in order to offer an optimum strength and desired extraction.

    For continued learning, please see our Brew Guides

There it is!

This extensive process is for any of us to enjoy an exceptional cup of coffee that does as much good as it tastes.

We don’t take any of this for granted. It’s what we get to do every day. Now that you see the whole process, you can appreciate it even more!