Watermelon

A watermelon is a big fruit.

It grows on a long vine. The plant has wide leaves. It can grow in many warm places.

The fruit has a hard green skin. Inside, the flesh is pink or red. It is very juicy. Some fruit has no seeds.

Many people grow them for food. China grows the most. You can eat the fruit raw. You can even make juice.

Watermelons are a tasty treat.

A watermelon is a large, juicy fruit.

It grows on a long, trailing vine. These plants have wide leaves with three lobes. The flowers are white or yellow. They grow on hairy stalks. Most watermelons are a type of berry called a pepo. This means they have a thick, hard rind.

The fruit is mostly water. In fact, it is 91% water! The inside can be red, pink, yellow, or even white. Many varieties have black seeds. Some people even grow seedless types.

Watermelons began in Africa. Scientists found old seeds in the Libyan desert. These seeds were 6,000 years old! People in Sudan and Egypt grew them long ago. Early watermelons were not as sweet as today. People used breeding to make them sweeter.

Today, many countries grow them. China is the top producer. They grow 64% of all watermelons. You can eat the fruit raw. You can also make juice or even pickles.

A watermelon is a huge and juicy fruit.

It grows on a trailing vine that climbs or crawls along the ground. These plants have wide leaves with three lobes. They also have white or yellow flowers on hairy stalks. The fruit is a special kind of berry called a pepo. A pepo has a thick, hard rind on the outside. Inside, the fleshy part can be red, pink, yellow, or even white. Most watermelons have many black seeds inside. Some people grow seedless varieties instead.

Growing a watermelon is a long process. The plant needs warm weather to thrive. It grows best in sandy soil that drains water well. First, the plant grows male flowers at the start of the season. Later, female flowers develop on the same plant. This system is called monoecious. Bees help by moving pollen from flower to flower. This is very important for seedless watermelons. Farmers often use three beehives per acre to help these plants. If there is not enough pollen, the fruit might get a hole inside. This is called hollow heart, but it is still safe to eat.

Watermelons have a very long history. They first came from Africa. Scientists found 6,000-year-old seeds in the Libyan desert. These seeds might be related to the Egusi seeds in Nigeria. People in Sudan and Egypt grew them a long time ago. In fact, Egyptians grew them by 2000 BC. Early watermelons were not sweet like the ones we eat today. They were often bitter and had white flesh.

Over many years, people used breeding to make them sweeter and easier to open.

Many different kinds of watermelons exist today. There are more than 1,000 varieties in the world. One group is called the Citroides group. This includes the citron melon, which has sweet yellow flesh. Another type is the bitter wooly melon. In 1753, a scientist named Carl Linnaeus first described the sweet watermelon. He gave it the name Cucurbita citrullus. Later, in 1836, Heinrich Adolf Schrader changed the name to Citrullus vulgaris. Today, China is the world leader in growing them. China produces 64% of all the watermelons in the world.

Watermelons are a great way to get water and energy. The fruit is 91% water. It also contains 6% sugar. This makes it a refreshing snack on a hot day. You can eat the fruit raw or turn it into juice. Some people even pickle the fruit. You can even eat the rind if you cook it. In places like the Kalahari Desert, watermelons are a very important source of water for people and animals.

They are a tasty part of many different meals around the globe.

The watermelon, scientifically known as Citrullus lanatus, is a flowering plant in the Cucurbitaceae family. It is famous for producing a large, edible fruit that is highly valued for its water content.

Botanically, the watermelon is classified as a pepo. A pepo is a type of modified berry characterized by a thick, hard outer rind called an exocarp. Inside this rind, the fleshy part consists of the mesocarp and endocarp. This fruit is widely cultivated in both tropical and temperate climates across the globe. With more than 1,000 varieties existing, it is one of the most diverse food crops in the world.

Growing a watermelon involves a specific biological process. The plant is an annual that grows as a trailing or climbing vine. It features stems that can reach significant lengths and new growth covered in yellow or brown hairs. The leaves are large and typically have three lobes. Most watermelon plants are monoecious, meaning they produce both male and female flowers on the same plant. At the start of the season, male flowers are more common. Later, female flowers develop and possess inferior ovaries. For commercial growers, pollination is a critical step. For seeded varieties, the USDA recommends at least one beehive per acre. However, seedless hybrids require more help because they have sterile pollen. Farmers must plant extra rows of pollinizer varieties and use up to three beehives per acre to ensure success.

There are several distinct types and groups of watermelon. One group is the Citroides group, which includes the citron melon, or makataan. This variety has sweet yellow flesh and is used for pectin or as animal fodder. Another significant group is the Lanatus group. Within these classifications, the bitter wooly melon, Citrullus lanatus var. lanatus, is a known variety.

There is also the edible variety, C. lanatus var. vulgaris, which is likely the most important for human consumption. While most modern watermelons have red or pink flesh, some varieties can be orange, yellow, green, or white. Some even produce seedless fruit, which became popular in the 21st century.

The history of the watermelon is rooted in Africa. Evidence suggests that the Kordofan melon from Sudan may be the ancestor of modern watermelons. Archaeologists found wild watermelon seeds at a prehistoric site in Libya called Uan Muhuggiag, dating to approximately 3500 BC. A 2022 study even traced these 6,000-year-old seeds to the Egusi seeds of Nigeria. By 2000 BC, watermelons were being cultivated in Egypt. Early versions were not the sweet fruits we know today; they were often bitter with yellowish-white flesh. Through centuries of selective breeding, humans developed the sweet, easy-to-open varieties used in modern agriculture.

Taxonomy, or the science of naming organisms, has evolved significantly for this plant. Carl Linnaeus first described the sweet watermelon in 1753 as Cucurbita citrullus. In 1836, the German botanist Heinrich Adolf Schrader reassigned it to the genus Citrullus, calling it Citrullus vulgaris. Later, L.H. Bailey mistakenly grouped the wooly melon with the sweet watermelon in 1930. Modern molecular data has corrected this, proving they are not closely related. This led to the formal acceptance of the name Citrullus lanatus by the International Botanical Congress in 2017.

Watermelon production is a massive global industry. In 2023, the world produced 105 million tonnes of watermelon. China is the dominant leader, producing 64% of the total global supply.

Other major producers include India, Turkey, Algeria, and Brazil. The fruit is highly nutritious and efficient for hydration. It is composed of 91% water and 6% sugars. The pulp also contains carotenoids, such as lycopene, which gives many watermelons their deep red color. The rind is also useful, as it contains the amino acid citrulline.

Beyond food, watermelons play vital roles in different ecosystems and cultures. In arid regions like the Kalahari Desert and East Africa, they serve as a crucial water source for both humans and animals. Cultivation requires specific environmental conditions, such as well-drained sandy loam with a pH between 5.7 and 7.2.

If pollination is insufficient, a condition called "hollow heart" can occur. This creates a large, symmetric hole in the center of the flesh, though the fruit remains safe to eat. From ancient Egyptian tombs to modern supermarkets, the watermelon remains a globally significant crop.