Why Is Tomato a Fruit and Not Cucumber? The Surprising Reason

tomatoes indoor plants

When it comes to defining what constitutes a fruit and what is a vegetable, there is often confusion. We all know that tomatoes are commonly referred to as vegetables, but did you know that botanically speaking, they are actually classified as fruits? 

This may come as a surprise to many people, especially considering that cucumbers are often seen as a close relative of tomatoes, and yet they are not classified as fruits. In this article, we’ll explore why this is the case.

The Botanical Definition of a Fruit

To understand why tomatoes are considered a fruit, we first need to understand the botanical definition of a fruit. A fruit is the mature ovary of a flowering plant, which usually has seeds inside of it. In other words, any plant structure that develops from the flower and contains seeds is technically a fruit. 

This means that some things we commonly refer to as vegetables, such as tomatoes, potatoes, and peppers, are actually fruits.

The Culinary Definition of a Fruit

While the botanical definition of a fruit may be straightforward, the culinary definition of a fruit is a little more complicated. In cooking, fruits are typically used in sweet dishes, while vegetables are used in savory dishes. This means that while a tomato may be a fruit from a botanical perspective, it is often used in savory dishes and is therefore referred to as a vegetable in culinary contexts.

The Differences Between Tomatoes and Cucumbers

Now that we understand the definition of a fruit, let’s take a closer look at why tomatoes are considered fruits while cucumbers are not. While tomatoes and cucumbers may look similar, there are some key differences between the two.

Seed Arrangement

One of the main differences between tomatoes and cucumbers is the arrangement of their seeds. In tomatoes, the seeds are arranged in a cluster in the center of the fruit. In contrast, cucumber seeds are arranged in a spiral pattern throughout the fruit. This difference in seed arrangement is a key factor in why tomatoes are classified as fruits and cucumbers are not.


Another difference between tomatoes and cucumbers is their sweetness. Tomatoes are often much sweeter than cucumbers, which is why they are commonly used in sweet dishes such as desserts and jams. Cucumbers, on the other hand, are often used in savory dishes and are not typically used in sweet dishes.

Botanical Classification

Finally, it’s worth noting that tomatoes and cucumbers are classified in different botanical families. Tomatoes belong to the nightshade family, while cucumbers belong to the gourd family. While these families may seem similar, they have some key differences that ultimately determine whether a plant is classified as a fruit or a vegetable.

The Historical and Cultural Reasons Why Tomatoes and Cucumbers Are Often Perceived Differently

People have grown and eaten tomatoes and cucumbers for thousands of years, and their uses in cooking have changed over time. Cucumbers have been used in salads, soups, and pickles for a long time because they are refreshing and cool. On the other hand, tomatoes have a more complicated and controversial history.

In the 1600s, tomatoes were brought to Europe from South America, where they had been grown for hundreds of years by native people. But people in Europe were suspicious of this “strange fruit” at first because it looked like the poisonous mandrake plant and was linked to witchcraft. 

Tomatoes didn’t become more popular in Europe until the 18th century, when Italian cooking and the fact that they were good for you made them more popular.

In the United States, tomatoes were similarly met with suspicion and even hostility. In the early 19th century, they were considered fit only for animal feed and were often referred to as “love apples” or “poison apples.” It wasn’t until the late 1800s that tomatoes gained widespread popularity in America, partly due to the growth of the canning industry and the rise of ketchup as a condiment.

Cucumbers and tomatoes have been a part of different culinary traditions, which has also affected how they are seen in history and culture. Cucumbers are a staple ingredient in many Middle Eastern and Mediterranean cuisines, where they are often paired with tangy yogurt or creamy tzatziki. In Japan, cucumbers are a popular ingredient in sushi and are often pickled for added flavor.

On the other hand, tomatoes are a big part of Italian food. They are used in everything from simple salads like caprese to more complicated sauces like puttanesca and bolognese. In Mexico and other Latin American countries, tomatoes are a key ingredient in salsas and sauces, as well as in dishes like chiles rellenos de huevos rancheros.

Why It Matters

While the distinction between fruits and vegetables may seem trivial to some, it actually holds a significant importance for those involved in the fields of botany and horticulture. By knowing how plants are put into botanical groups, experts can learn more about their genes, how they reproduce, and the best way to grow them. 

This knowledge can help us make food production more efficient and last longer, which is important if we want to meet the needs of a growing population.

In addition to its importance in the realm of botany and horticulture, understanding the differences between fruits and vegetables can also be helpful in cooking. As mentioned earlier, fruits tend to be sweeter than vegetables and are often used in sweet dishes, while vegetables are used in savory dishes. Understanding these differences can help chefs and home cooks make better-informed decisions when selecting ingredients and planning menus.

For example, knowing that tomatoes are a fruit can help home cooks choose the best recipe for their particular use. Tomatoes are often used in savory dishes like salads, soups, and pasta sauces, where their tartness and acidity can add depth of flavor. However, they can also be used in sweet dishes like jams and desserts, where their sweetness can complement other flavors.

Similarly, understanding that cucumbers are a vegetable can help home cooks make informed decisions about how to use them. Cucumbers are often used in savory dishes like salads, sandwiches, and dips, where their crisp texture and refreshing flavor can add a bright and crunchy element. 

While cucumbers are not commonly used in sweet dishes, they can be used in some creative ways, such as pickling or as a base for refreshing summer drinks.


In conclusion, we usually call tomatoes vegetables, but from a botanical point of view, they are actually fruits. This is due to their seed arrangement and other factors that distinguish them from vegetables such as cucumbers. 

While the culinary definition of a fruit may be different from the botanical definition, understanding the difference between the two can be helpful in cooking and understanding different ingredients. 

Whether you’re a botanist, a cook, or just someone who loves tomatoes and cucumber, understanding their classification as a fruit is an interesting and informative topic to explore

Similar Posts