Tall trees dimensions

Question: Tall plant dimensions

What is the technical term to indicate the size of tall trees but of small size (about two years of life). In some sites I have seen the terms 1 ° magnitude, etc. but I don't know the exact correspondence. Thanks

Answer: Dimensions of tall trees

Dear Domitilla,
there are many trees on the earth, thousands of species; each of these species has unique characteristics that make it different from the others, including the size of an adult. Therefore there are trees that are enormous as adults, and easily exceed 20 meters in height, while other trees, often called saplings, never exceed 3-4 meters in height. An example is the catalpa, which although remaining small, has the development of a tree, with an erect stem, and an enlarged crown. The experts, in order to better indicate the final dimensions of an adult tree of a species, use the terms first magnitude, second magnitude, etc. However, it is always understood, with these terms, an adult tree, with its final dimensions. This is because a two-year-old tree of any species is generally kept below two or three meters in height, and therefore it makes no sense to create a specific term to indicate all the young trees below the two years. Therefore we will have the trees of first magnitude, which are those that in adulthood exceed the twenty-five meters of height, like the beeches, the ginkgo, the larch; second-largest trees, which as adults have sizes between fifteen and twenty-five meters, such as birch or willow; the third-largest trees, on the other hand, remain between eight and fifteen meters in size, such as mulberries and junipers; the last trees of fourth magnitude, those that we generally call also saplings, are small, or even as adults they do not exceed eight meters in height, such as the olive tree, which does not exceed even four or five meters in height. This classification was made in order to be able to combine the various trees in classes of final dimensions, and therefore to better understand how to grow these plants. For example, if I have a small condominium garden, it would be advisable to plant trees of third or fourth size, avoiding in any case those of the first magnitude, which are suitable only for large parks. To place a tree of first magnitude in a tiny garden certainly means leading it to a culling when it is still young, due to its size. In some cases the classes of belonging of a tree vary according to where this tree is grown, because the climatic conditions vary the maximum reachable dimensions.