The diverse height of the apple trees is usually measured in meters. It is believed that apple trees have been cultivated in different climate conditions since the 3rd century BC AD, especially in Asia. Today, apple is probably the most popular fruit for adults and children. Its widespread use is partly due to the fact that the apple tree is very flexible and durable. It can bear fruit in temperatures as low as -22°F (-30°C). Today, apple trees grow in a variety of climates, from cold Canada to tropical Africa. Therefore, apple trees do not always need the best conditions to flourish. Trees are valued because they adapt to local conditions and bear fruit despite difficulties if the variety is chosen wisely. About half of the world's apple production occurs in China, but apple trees are also grown in Australia, North and South America, North Africa and Japan. In the United States, apple trees are grown commercially mainly in Washington, New York, Michigan, Pennsylvania, Virginia, California, North Carolina, Oregon, Ohio, and Idaho. 
The apple tree (Malus pumila) is part of the Rosaceae family. It is a deciduous tree (it loses its leaves seasonally). It reaches an average height of 16 feet (5 meters). Common apple trees can reach a height of 7.5 to 10 meters or even more. Semi-dwarf and dwarf trees reach heights of 2 to 6 meters (6 to 20 feet). Flowers are produced in spring. The fruits ripen on shoots that are at least 2 years old. They ripen in late summer or autumn, depending on the variety. More than 7000 varieties are known. An average apple tree can produce a significant amount of fruit in 3-6 days. until the age of 35 and can continue until 50. until the year of birth. Almost all apple trees are not self-pollinating. This means that if you don't have other apple trees in your yard (80 feet or 25 m), you may need to plant at least 2 trees of different varieties to harvest the fruit. 
You can enrich this article by leaving a comment or a picture of your apple trees. Two of the most important advantages of apple trees are fragrant spring flowers and delicious fruit. Although apple trees need the cold of winter to bloom, they can survive in USDA plant hardiness zone 8. When mature, apple trees' large size also makes them excellent shade trees for the vegetable garden. On the other hand, they can be limited or reduced in size, which is useful if you have a small space to grow them. Adult size
- Apple trees vary in height depending on the species. Small apple trees reach about 10 feet tall, while smaller shrub varieties can reach 15 feet.
Meanwhile, full-size apple trees typically exceed 20 feet in height, sometimes as high as 30 feet. Because full-sized apple trees fruit later than smaller trees and are generally smaller in stature, smaller apple varieties are preferred in many home gardens. How to Train Young Trees 
- When apple trees are young, you have the opportunity to shape and proportion them appropriately for your garden.
If you want a smaller tree, train it in a center or leader that is formed like a "Y." If you want a taller plant, train it in a container. After the first year the tree has been planted, you should begin this form of pruning, and you should keep doing it every year until the tree is healthy. You can continue to prune back overgrown branches every year if you wish to bring the size of the apple tree down. You should also cut twenty percent of the growth from the previous year each winter; doing so is beneficial to the plant's health and fertility. Reduce or remove growth by pruning.
- Apple trees need to be pruned in order to maintain growth control and assure good fruit.
The University of California suggests that the ideal time of year to cut is during the hibernating period, which occurs in January if possible. Remove any branches that are now dead, infected, congested, or passing through the area. You can also prune the branches right above pine or white apple trees by eliminating entire branches from the back of their branches, which are the swelling starting sites of the branches near the trunk. This is another method for pruning. Effects of isolation
- Although trimming apple trees might encourage regrowth, it is likely that the size of mature trees will be permanently diminished as a result of the process.
The removal of the leaves, which are a source of nourishment, will hinder the growth in this area. Cuttings, on the other hand, frequently result in vigorous new growth that can enhance the size of old apple trees without adding to their overall height. Because these young blossoms might sometimes compete with the older ones for nutrients and sunlight, bleaching apple tree branches typically results in healthier intact branches than chopping them does.