Blackberry

Blackberries grow on long stems called canes.

Some stems have sharp thorns. Other kinds have no thorns at all.

In the first year, the stems grow long. They do not have flowers yet. In the second year, the stems grow flowers. The flowers have five pink or white petals.

Small bugs called pollinators visit the flowers. This helps the plant make fruit. The berries start out red. They turn black when they are ready to eat.

Animals like bears and birds love to eat them. When animals eat the fruit, they spread the seeds. This helps new plants grow in new places.

Blackberries can grow in many lands. They grow wild in Europe and America. Some people pick them for fun.

Blackberries are tasty fruits that grow on long stems. We call these stems canes.

Most canes have sharp thorns. However, some new kinds have no thorns at all.

Blackberries grow in a special way. In the first year, a new stem is called a primocane. This stem grows long but does not make flowers. In the second year, the stem is called a floricane. This stem grows flowers in late spring.

The flowers have five white or pink petals.

Tiny insects help the plant. These insects are pollinators. They visit the flowers to help the fruit grow.

The fruit is made of many small parts called drupelets. When the fruit is not ready, it is red. It turns black when it is ripe.

Many animals love to eat these berries. Bears, foxes, and birds eat them. When they eat, they spread the seeds to new places. This helps more blackberries grow. Some blackberries grow wild in Europe and America. People even pick them for fun.

Blackberries are tasty fruits that grow on long, woody stems called canes. These plants belong to a large group with over 375 different species. Many of these species grow all over the world. You can find them in Europe, Africa, Asia, and the Americas. They are very useful to farmers because they produce a lot of fruit. However, some types can grow so fast that they become weeds. In the Pacific Northwest of North America, the Himalayan blackberry is a noxious weed. This means it grows out of control in parks and woods.

There is a special way these plants grow each year. In the first year, a new stem is called a primocane. This stem grows long and has large leaves, but it does not make flowers. In the second year, the stem becomes a floricane. This is the stem that produces flowers in late spring or early summer.

The flowers have five white or pink petals. Tiny insects like bees visit these flowers to help them grow.

Each flower makes a fruit made of many small parts called drupelets. A blackberry is different from a raspberry because the core stays with the fruit when you pick it.

People have been studying and growing different kinds of blackberries for a long time. In 1880, a man named James Harvey Logan created the loganberry. This was a special hybrid between a blackberry and a raspberry.

Later, scientists worked to make the plants easier to pick. In 1921, one of the first thornless varieties was made. More recently, the US Department of Agriculture developed many new thornless types. These include names like Triple Crown and Black Diamond. These new plants have better flavor and are easier to harvest with machines.

Different places in the world grow blackberries in different ways. Mexico is a very big producer of blackberries for the world. In 2017, Mexico provided almost all the fresh blackberries sent to the United States. In the United States, Oregon is the leader in growing them for business. Some special plants, like the 'Illini Hardy', can survive very cold winters. This variety survived temperatures as low as -20°F in Illinois. Other types, like the 'Tupy' from Brazil, are very popular in Mexico. Scientists use these different varieties to make sure we have fruit all year.

Blackberries are a very important part of nature. Many animals love to eat the ripe fruit. Red foxes, American black bears, and Eurasian badgers all eat them.

Even small birds enjoy the berries. When animals eat the fruit, they spread the seeds to new places. This helps the plants grow in new spots. Some insects, like certain caterpillars, even use the leaves for food. This shows how many living things rely on the blackberry to survive.

Blackberries are edible fruits produced by many species within the genus Rubus. They belong to the Rosaceae family and include many hybrids. These plants are commercially important because they produce abundant annual volumes of fruit. However, some species can be problematic. For example, Rubus armeniacus, known as the Himalayan or Armenian blackberry, is considered a noxious weed. In the Pacific Northwest of Canada and the United States, it grows out of control in woodlands and parks.

Botanically, a blackberry is not a true berry. It is an aggregate fruit made of many small drupelets. Each drupelet develops around an ovule that was fertilized by a male gamete from a pollen grain. One way to distinguish a blackberry from a raspberry is by how it attaches to the stem. When you pick a raspberry, the torus, or receptacle, remains on the vine, leaving a hollow core. When you pick a blackberry, the torus stays with the fruit.

Blackberry plants are perennials that grow on biennial stems called canes. These stems follow a specific two-year cycle. In the first year, the plant produces a primocane. This new stem reaches a full length and grows large palmate compound leaves. However, the primocane does not produce any flowers or fruit.

In the second year, the cane becomes a floricane. This is a non-growing stem where lateral buds open to produce flowering laterals. Most canes produce short, curved, sharp thorns, though scientists have developed thornless cultivars.

The history of blackberry cultivation involves significant scientific work in hybridization. In 1880, James Harvey Logan developed the loganberry, a hybrid of blackberry and raspberry. While the first thornless varieties appeared in 1921, they often lacked good flavor. Modern improvements came from the US Department of Agriculture (USDA-ARS). Between the 1990s and the early 21st century, they developed thornless cultivars like Triple Crown and Black Diamond. These varieties allow for efficient machine-harvesting and produce larger, firmer fruit with better flavor.

There are several distinct types of blackberry plants based on how they grow. Trailing blackberries are very vigorous and require a trellis for support. They are common in the Pacific Northwest, New Zealand, and Chile. Semi-erect blackberries are also vigorous and need trellises, but they are often bred to be prickle-free. Erect blackberries are less vigorous and spread underground via root initials, much like raspberries. Some erect varieties, such as 'Prime-Jan' and 'Prime-Jim', are primocane fruiting. This means the canes flower in midsummer and fruit in late summer or fall.

Global agriculture relies heavily on specific blackberry cultivars. Mexico is a leading producer, providing nearly 97% of the fresh blackberry market imported into the United States in 2017. Much of this production uses the 'Tupy' cultivar, which was released in Brazil in the 1990s. In the United States, Oregon is the top commercial producer, having produced 110 million pounds in 2017. Because some regions lack the winter chilling needed for flower buds, farmers may use chemical defoliation or growth regulators to help the plants bloom.

Blackberries play a vital role in local ecosystems. The leaves serve as food for various caterpillars and grazing mammals like deer. When the berries are ripe, they are eaten by birds and mammals, including the red fox, American black bear, and Eurasian badger. As these animals eat the fruit, they disperse the seeds to new locations. However, growers must watch for pests like the spotted-wing drosophila. This insect lays eggs under the soft skin of fresh fruit, where the larvae grow and destroy the crop.