What You Should Know About Coffee Flowers and Cherries

Ever wondered why coffee cherries turn red, what those tiny white blooms on coffee farms mean, or why some beans are perfectly round? If you’ve ever sipped a single-origin pour-over and wondered what went into growing those beans, understanding the coffee plant’s life cycle is a great place to start.

A typical coffee tree grows 5 to 10 metres tall but is pruned to under 2 metres for easier harvesting. Each coffee cherry usually holds two flat-sided beans—but sometimes, you’ll find just one round bean inside. These rare round beans are called peaberries, and they’re often sweeter and more flavourful.

What Is a Coffee Tree?

Coffee trees are evergreen shrubs or small trees that produce white flowers and green fruits. The fruit starts green, then turns bright red as it ripens—earning the nickname ‘coffee cherry.’ Inside each ripe cherry are typically two coffee beans, though sometimes just one.

Left unpruned, a healthy coffee tree can reach between 5 to 10 metres in height. However, farmers usually prune them to stay under 2 metres to make hand-picking easier and more efficient.

What Do Coffee Flowers Look Like?

Coffee flowers are small, white, and strongly scented, resembling jasmine in both fragrance and appearance. They bloom in clusters tightly attached to branches. Each flower has five petals that curve backward, releasing a powerful, sweet aroma.

The flowering period occurs around February to March, once the tree is 4 to 5 years old. The blossoms last only 3 to 5 days, making the sight of a full coffee blossom bloom a rare and fleeting event.

After pollination, the flowers develop into green, oval coffee fruits. These fruits take roughly 6 to 7 months to mature.

How Do Coffee Cherries Develop and Ripen?

Unripe coffee cherries are green. Over the course of 6 to 7 months, they mature into bright red fruits. This red, cherry-like appearance is why many people—and countries—call them coffee cherries.

Beneath the red skin is a layer of sweet, sticky mucilage. Encasing each pair of coffee beans is a tough, tan-colored husk called the parchment (or endocarp). Inside the parchment, each bean is coated with a very thin membrane known as the silver skin.

Most cherries contain two beans that sit flat against each other. But occasionally, a cherry develops a single, rounded bean instead—this is the peaberry.

What Is a Peaberry Coffee Bean?

A peaberry, also called a caracol or single bean, is a natural mutation where a coffee cherry produces just one round bean instead of two flat ones. These beans are smaller, rounder, and lack the usual flat side.

Because peaberries occur infrequently and must be hand-sorted, they’re rarer and often more expensive. Many coffee enthusiasts believe peaberries have a more concentrated flavour, as the single bean absorbs more nutrients during development.

While not inherently superior, peaberries are often separated during processing and sold as a distinct grade. Their unique shape and potential for intense flavour make them a favourite among specialty roasters and curious drinkers alike.

Frequently Asked Questions

How tall does a coffee tree grow?

A healthy, unpruned coffee tree can grow between 5 to 10 metres tall. However, most coffee farmers prune their trees to stay under 2 metres to simplify harvesting.

What colour are coffee cherries when they’re ripe?

Coffee cherries start off green and turn bright red when fully ripe. This red colour is why they’re commonly called ‘coffee cherries,’ as they resemble cherries in size and hue.

Do all coffee cherries have two beans?

No. Most coffee cherries contain two flat-sided beans, but about 5% contain a single round bean called a peaberry. This happens when only one seed develops inside the cherry.

How long do coffee flowers bloom?

Coffee flowers bloom for just 3 to 5 days, typically between February and March, once the tree is 4 to 5 years old. Their white, jasmine-like blossoms are highly fragrant but short-lived.

What is the silver skin on a coffee bean?

The silver skin is a very thin, silvery membrane that covers each coffee bean. It’s found just beneath the bean’s outer protective layers, including the parchment and mucilage.

Why are peaberries more expensive?

Peaberries are rarer because they occur in only about 5% of coffee cherries. They must be hand-selected and are often considered to have a more intense flavour, leading to higher prices.

Recommended FrontStreet Beans for Coffee Fruit Lovers

Explore the origins of coffee cherries with FrontStreet Coffee’s Ethiopia Guji Humbera, a bright and juicy single origin with notes of citrus and floral tones echoing the very blossoms that precede the cherry. For a classic red cherry profile, try Yirgacheffe, offering lemon, berry, and soft floral sweetness. Finally, the Kenya AB lot brings tart cranberry and blackcurrant notes—fruits that mirror the cherry’s vibrant evolution. All three showcase the fruit-forward qualities rooted in the coffee cherry. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.