Almond

Almonds grow on trees.

These trees have pretty white or pink flowers. The flowers bloom in early spring. Inside the fruit is a hard shell. This shell protects a small seed. We call this seed a nut. Most people eat the sweet seed. Some trees make bitter seeds instead.

California grows most of the world's almonds. It is a very big job. Many bees help the flowers grow. These bees fly to the trees every year.

Almonds grow on trees. These trees like warm, dry summers. They also like mild, wet winters.

In early spring, the trees grow white or pink flowers. These flowers bloom before the leaves appear. Many almond trees need help to make fruit. They need pollen from different trees. Insects like bees carry this pollen.

Every February, over one million beehives go to almond farms in California. This is the largest pollination event in the world.

The fruit is not a true nut. It is a drupe. A drupe is a fruit with a hard shell. The fruit has a thick, leathery skin called a hull. Inside the hull is the hard shell. The seed is inside that shell. Most people eat the sweet seed. Some seeds are bitter. To make blanched almonds, people use hot water. This softens the skin so it can be removed. This reveals the white part inside. You can store clean almonds in a fridge for a year. If they are too warm, they go bad quickly.

The almond is a special kind of tree. It belongs to a group called Prunus. Most people think of almonds as nuts. However, they are actually a drupe. A drupe is a fruit with a hard shell.

This fruit has a thick, leathery, green coat called a hull. Inside that hull is a woody shell. The part we eat is the seed inside.

This seed is often called a nut in the kitchen. It is very important for many foods. People even use it to make a sweet treat called marzipan.

Growing an almond is a step-by-step process. First, the tree needs a Mediterranean climate. This means it likes warm, dry summers. It also needs mild, wet winters.

In early spring, the tree grows fragrant flowers. These flowers are white or pale pink. They appear before the leaves grow. The flowers must be pollinated to make fruit. Most almond trees are self-incompatible. This means they need pollen from a different tree. Insects like bees carry this pollen between flowers. After flowering, the fruit grows for seven or eight months. In the autumn, the hull splits open. Then, the fruit falls from the tree.

Humans have grown almonds for a very long time. They were one of the earliest fruit trees to be domesticated. This happened because they can grow from seeds. People found evidence of them in the Early Bronze Age. These sites are in the Middle East.

Almonds were even found in the tomb of Tutankhamun in Egypt. Long ago, people spread them along the Mediterranean Sea. They moved them to northern Africa and southern Europe. Today, they are grown in many different parts of the world.

There are many interesting facts about where almonds come from. California is a huge producer of almonds. It makes about 80% of the world's supply.

However, growing them there can be a hard job. California faces droughts and heat from climate change. This makes it difficult to grow enough. In February, California has a massive event. Over one million beehives are brought to the orchards. This is the largest managed pollination event on Earth.

Almost half of all honeybees in the U.S. help these trees. This helps ensure there are enough seeds to eat.

Almonds are linked to many things you see every day. You might see them in a grocery store. They can be sold with the shell or without it.

Some almonds are blanched. This means they were put in hot water. The water softens the skin so it can be removed. This shows the white embryo inside. You can keep clean almonds in a fridge for a year. If you leave them in a warm place, they become rancid. This means they will taste bad very quickly.

Knowing how to store them helps keep them tasty.

The almond, known scientifically as Prunus amygdalus, is a deciduous tree belonging to the genus Prunus. While many people call the edible part a nut, it is biologically classified as a drupe. A drupe is a fruit that features a fleshy outer layer surrounding a hard, woody shell. The almond is unique because its outer covering, called the hull, is a thick and leathery grey-green coat rather than soft flesh. Inside this hull lies the endocarp, which is the hard, reticulated shell that protects the seed. The part we eat is actually the seed, or embryo, located inside that shell.

The life cycle of an almond tree follows a specific seasonal sequence. In early spring, the tree produces fragrant white or pale pink flowers. These flowers appear singly or in pairs before the leaves even grow. For the fruit to develop, the flowers must undergo pollination. Most commercial almond varieties are self-incompatible, meaning they cannot produce seeds using their own pollen. They require pollen from a different variety to succeed. Insects, specifically honeybees, act as the primary pollinators by moving between different trees.

Once pollination occurs, the fruit begins a long development process. It takes approximately seven to eight months for the fruit to mature after flowering. The fruit reaches maturity in the autumn. At this stage, the hull splits and separates from the woody shell. An abscission layer forms between the stem and the fruit, allowing it to drop from the tree. To make harvesting faster, modern farmers often use mechanized tree shakers. These machines vibrate the trees so the fruit falls to the ground for easy collection.

Almonds have a long history of human interaction. They were among the first fruit trees to be domesticated by humans. This was possible because they can produce quality offspring directly from seeds. This ability allowed cultivation to begin even before the invention of grafting. Archaeological evidence shows domesticated almonds were present during the Early Bronze Age in the Middle East. They have been found in ancient sites like Numeira in Jordan. Almonds were even discovered in the tomb of Tutankhamun in Egypt.

The taxonomy, or naming system, of the almond has a complex history. Carl Linnaeus first named the species Amygdalus communis in 1753. Later, in 1801, August Batsch placed the species into the genus Prunus. There was significant debate over the correct scientific name due to previous publications. For example, the name Prunus dulcis was published in 1967 by David Allardice Webb. However, that name was unavailable because it had been used for a cherry in 1878. Consequently, Prunus amygdalus remains the oldest valid scientific name for the species.

Today, almond production is a massive global industry, with California producing about 80% of the world's supply. This scale requires a massive biological effort every February. Over one million beehives are moved into California orchards for pollination. This represents nearly half of all honeybee colonies in the United States. This is the largest managed pollination event in the world. However, the industry faces challenges from climate change. Persistent droughts and extreme heat in California can make production unsustainable. These environmental stresses have caused some producers to leave the industry, which increases prices.

There are important biological differences between sweet and bitter varieties. Most commercial almonds are the sweet variety, which are predominantly used in food. Bitter almonds contain a different chemical makeup. They possess an enzyme called emulsin. When emulsin meets water, it reacts with substances called amygdalin and prunasin. This reaction produces glucose, essential oils, and hydrogen cyanide. Because of this, bitter almonds contain much higher levels of cyanide than sweet ones. In fact, bitter almonds can contain 42 times more cyanide than the trace amounts found in sweet almonds.

Almonds are highly versatile in global cuisine. They are frequently used in desserts, such as the sweet paste known as marzipan. They can be sold to consumers in several different forms. Some are sold unshelled, while others are sold shelled to reveal the seed. A common process is blanching, where almonds are treated with hot water. This softens the outer skin so it can be easily removed. This reveals the white embryo inside. To keep them fresh, cleaned almonds should be stored in a refrigerator. If kept at higher temperatures, they will become rancid more quickly.