Coffee Harvest: Why Ripe Cherries Decide What Ends Up in Your Cup

The first moment that decides quality

Before a coffee is roasted, ground and brewed, the most important thing often happens unnoticed: the harvest. When a coffee cherry is picked, and how ripe it is at that moment, shapes almost everything that ends up in the cup. You cannot roast away a mediocre harvest. That is why the moment of picking is the first real quality decision on the whole journey from the farm to your mug.

Why the cherries do not all ripen at once

A coffee shrub is not like an apple tree that you pick clean once and you are done. On one and the same branch you find green, yellow, red and almost black cherries all at the same time. They ripen unevenly over weeks. That is exactly what makes the harvest so demanding: if you only want the ripe fruit, you have to visit the same shrub several times. If you take everything at once, you get a mix of too young, perfect and overripe. From this single fact come the three big harvesting methods.

Selective hand picking: the specialty coffee way

With selective hand picking, the pickers walk the rows and take only the cherries that are truly ripe. They leave the rest hanging. Over the season they return to the same shrub every eight to ten days, often in several rounds across weeks. It is the most expensive and labour-intensive method, but it delivers the most even and the best quality, because in the end every cherry in the sack is at the same level of ripeness. Almost every specialty coffee you drink was harvested this way. It is handwork in the literal sense, and it is the reason good coffee has its price.

Strip picking: everything at once

With strip picking, the whole branch is stripped in one go, ripe or not. This can be done by hand or with simple tools and is much faster and cheaper. The price you pay: ripe, unripe and overripe cherries all land in the sack mixed together. They have to be sorted out afterwards, painstakingly, and even then the quality stays behind selective picking. Strip picking is the method for large volumes and commodity coffee, where quantity matters more than finesse.

Mechanical harvesting: fast, but fussy about terrain

The third option is the machine. Large harvesters drive over the rows and shake the cherries off the shrub into collection bins with rotating rods. This is hugely efficient and saves a great deal of labour, but it only works on flat ground. That is why mechanical harvesting is mostly found in Brazil, where many plantations sit on the plains. In the steep mountain regions of Ethiopia, Colombia or Central America it simply cannot be used, and there hand picking stays the norm.

How to spot a ripe cherry

A ripe coffee cherry is usually deep red or dark purple. In some varieties, such as Yellow Bourbon, it turns yellow or orange instead. What matters is not the colour itself but the sugar: at full ripeness the cherry holds the highest sugar content, and that sugar later becomes sweetness, body and complexity in the cup. Picked too early, the coffee tastes green, sour and thin. Picked too late, the fruit starts to ferment on the branch and you get musty, over-fermented notes. Top lots that score above 87 points on the Specialty Coffee Association scale are almost always harvested at peak ripeness. For more on how the fruit is built, see our piece on the coffee cherry.

How much cherry is in a cup

The quantities behind the harvest surprise most people. To get one kilo of green coffee you need around five to six kilos of fresh cherries. Put differently: only about 16 to 20 percent of a cherry's weight ends up as the green bean, the rest is pulp, skin and water. Next time you hold a 250-gram bag, remember that a good one and a half kilos of cherries were hand picked, sorted and processed for it.

When coffee is actually harvested

Coffee has no worldwide harvest time, it follows the seasons of each growing region. In most countries there is one main harvest per year. In Brazil it runs roughly from May to September, in Ethiopia from October to January. Colombia is a special case: thanks to its many microclimates it has two harvests, the large main harvest from September to December and the smaller secondary one, called mitaca, from April to June. For roasters this means that somewhere, something is always being freshly harvested across the year, and that is exactly why coffee has a kind of seasonality too.

Why this matters for your coffee

The harvest is the invisible part of the story. Nobody on the bag tells you how many times someone walked the same shrub just to catch only the ripe cherries. But that care is exactly what you taste. When a coffee comes across as clear, sweet and clean, there is almost always a clean harvest behind it. What happens next, the drying and fermenting, you can read about in our piece on coffee processing. And if you want to try coffee from small Swiss roasteries that choose their beans precisely because of details like these, you will find them on our marketplace.