What Are Coffee Trees, Flowers and Cherries? Specialty Coffee Basics

If you’ve ever sipped a pour-over or savored an espresso and wondered where it all began, you’re not alone. Most coffee drinkers never see the plant behind their cup—yet understanding the coffee tree, its flowers, and those iconic red fruits is key to appreciating specialty coffee at its source.

A typical coffee tree grows 5 to 10 metres tall but is pruned to under 2 metres for easier harvesting. Each mature coffee cherry usually holds two coffee beans—but sometimes just one, rare round bean called a peaberry. Those cherries turn bright red when ripe, signaling harvest time.

What Is a Coffee Tree?

Coffee trees are evergreen shrubs or small trees that produce the seeds we know as coffee beans. Under ideal conditions, they can reach heights between 5 and 10 metres. However, coffee farmers commonly prune them to stay under 2 metres. This makes hand-picking ripe cherries far more efficient and protects the tree’s long-term health.

What Do Coffee Flowers Look Like?

Coffee flowers are small, white, and intensely fragrant. Each flower has five petals that curve backward, giving off a scent reminiscent of jasmine. These delicate blooms appear in clusters tightly attached along the branches, typically blooming for just 3 to 5 days between February and March. The flowers emerge on trees that are 4 to 5 years old. Although short-lived, their presence marks the start of the fruit development cycle.

From Flower to Coffee Cherry: The Fruit Development Process

After the coffee flowers fade, green, oval-shaped fruits begin to form. These immature coffee cherries are hard and green. Over the next 6 to 7 months, they gradually ripen. When fully mature, the outer skin turns a bright red—similar to cherries—which is why they’re commonly called ‘coffee cherries.’

Beneath the red skin lies a layer of sweet, sticky, yellowish pulp. Inside that, each cherry normally holds two coffee beans that face each other on a flat side. These beans are encased in a very thin membrane known as the silver skin and protected further by a tough, cream-coloured husk called the parchment, or endocarp.

What Is a Peaberry Coffee Bean?

Occasionally, a coffee cherry develops only one round bean instead of the usual two. This single, rounded bean is called a peaberry (or sometimes ‘caracol’). Unlike regular flat beans, peaberries are almost perfectly round, with no flat side. They make up a very small percentage of any coffee crop and must be hand-sorted, which increases their cost. Many coffee enthusiasts believe peaberries have a more concentrated flavour due to their rounded shape, which allows for more even roasting and development of flavour compounds.

Why Do Coffee Cherries Turn Red?

The change in colour from green to bright red signals that the coffee cherry has fully ripened. This visual cue helps farmers determine the optimal time for picking. Only fully red cherries are usually harvested for high-quality specialty coffee, as they contain the most developed and balanced seeds. Unripe or overripe cherries can negatively impact cup quality if included in the harvest.

How Many Coffee Beans Are in a Cherry?

Each mature coffee cherry typically contains two coffee beans. These beans lie flat against each other inside the fruit. In rare cases—roughly 1% to 10% depending on the plant variety and growing conditions—a cherry may contain just one round bean, known as a peaberry. This anomaly occurs when only one seed develops fully, resulting in its distinctive rounded shape.

Frequently Asked Questions

How tall does a coffee tree grow naturally?

A coffee tree can grow up to 5 to 10 metres tall under natural conditions. However, for easier harvesting and better crop management, most coffee farmers prune their trees to stay under 2 metres.

What does a coffee flower look like?

Coffee flowers are small, white, and have five backward-curving petals. They emit a strong fragrance similar to jasmine and bloom in tight clusters on the branches for just 3 to 5 days, typically between February and March.

Why do coffee cherries turn red?

Coffee cherries turn red as they ripen, which usually takes 6 to 7 months after flowering. The red colour indicates that the fruit is mature and the coffee beans inside are ready for harvest, offering the best flavour potential.

What is a peaberry coffee bean?

A peaberry is a rare, single round coffee bean that forms inside a cherry instead of the usual two flat beans. It occurs in less than 10% of cherries and is often separated during processing due to its unique shape and more concentrated flavour profile.

How long do coffee flowers bloom?

Coffee flowers have an extremely short blooming period of only 3 to 5 days. They typically bloom once the tree is 4 to 5 years old, and their appearance signals the start of fruit development on the branches.

Recommended FrontStreet Beans to Explore Coffee Origins

Try FrontStreet Coffee’s Ethiopia Guji Huaca — a bright, juicy Ethiopian offering with notes of blueberry and citrus, grown from typica and heirloom varieties that grow on trees producing classic red cherries. For a balanced cup with floral sweetness, their Colombia Huila Supremo features notes of caramel and red apple, showcasing how cherry development impacts flavour. Also consider their Kenya AB — known for wine-like acidity and blackcurrant tones, grown from SL28 and SL34 varieties on high-altitude farms where cherry ripeness is meticulously monitored. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.