Crohn tree.

pinnacle of evolution of plants is familiar, but no less amazing and incredibly diverse life forms - trees.In many religions, the tree - a symbol of life, fertility and knowledge, and folklore in the works assigned to it is not the last place.Who does not remember the apple tree, saving children from geese swans, or epic willow mourning the dead Russian soldiers?But
today forget about the fabulous characters and talk about the features of this unique form of life, the formation of crowns, their types and densities.

Types crown

dendrologist introduced differentiation scale quantities of trees.They identify the trees that make up the top tier - up to 20 meters.The size of the second tier - from 10 to 20 meters, the third - 5-10 meters.

landscape designer in the design areas must take into account not only the quantity, but also the shape of the trunk and crown types.Crohn tree is completely independent of its height, but it defines the form.The same form can be a 30-meter giant trees and plants, is

less than a meter in height.

conditionally allocated the following forms of the trees:

• pyramid (poplar);

• extended (juniper);

• columnar (columnar apple);

• umbrella (pine Italian);

• spherical, oval (Siberian apple, elm, chestnut, larch);

• weeping (weeping willow, birch);

• tier (pine);

• creeping (creeping cedar, creeping kinds of apple trees).

crown density

important factor in the device of parks and gardens is considered to be the density of the crown.The most dense is the one, in which the gaps are 25%.25-50% gaps create medium density crown.If they take up more than half of the tree crown light and tracery.Trees can be a whole-compact or separate, compact form, where there are gaps between the tiers.

elongated shape

This form is characterized by spindle-shaped crown.In the center it is more volume, is quite narrow at the bottom and pulled up.Poplar and Provencal cypress - bright representatives of this form.It's a win-win for creating small gardens.Forming a strict vertical lines, their most profitable way Kroon emphasizes the uneven terrain and increases the feeling of height.

trees that form beautifully animate and represent long term.The rows of Lombardy poplars planted at the bottom of ravines, creating a unique sight: narrow silhouettes of trees highlight the steep slopes, contrasting with them.In addition, it ordered planting these trees create a magnificent curtain windproof.

columnar shape

This form is close to the length, but its representatives have no thickening in the middle of the crown, and there is a fairly broad base, almost the same size as the top of the tree that gives the impression of a whole column.Very interesting park with plantings of trees of similar shape, giving them an easy southern flavor.Planted in a checkerboard pattern, trees columnar forms create effective protection from the wind.

pyramidal crown

most interesting tree crown - pyramidal.Recently, so-called all trees with foliage in the form of a cone with a pronounced thick volume, create a clear geometric silhouette.These crowns are strikingly different from each other.This difference determines the growth of branches: growing up branches creating an elongated frame thick volume, horizontal - light monumental, cascading give the plant a lush and romantic look.

longline krona

Such krona creates the impression that the tree is of several tiers - horizontal layers, practically identical terms.This original krone meets at cedars of Lebanon, some shrubs: dogwood, dwarf conifers.Modern designers use tiered crown in interesting landscape composition with clear geometric lines.

Weeping krona

Flowing to land a flexible thin branches, tender well-groomed appearance.Weeping krona, admittedly, the most touching and romantic.This tree crown, photo
are presented in the article, for all their entertainment needs constant care and quality care.These plants are particularly spectacular from the water or on the distinction between the levels drop.For example, on uneven hills and valleys.

spherical, oval crown

ball-shaped or oval crown can be round, flattened, cylindrical, flared, and others. The most outstanding representatives of this form of trees - beeches, oaks, elms.

creeping krona

This form is often used in the design of modern gardens.Creeping species tend to have a Far Eastern origin.They are exotic and picturesque:
plant spread along the ground as in the wild on the coast or in the highlands.

Umbrella krona

most exotic tree crown is undoubtedly an umbrella.It is smooth trunk ends with a magnificent umbrella.All the trees of the type of umbrella pines to the classical exquisite magnolia - Virginia umbrella have a monumental look.Kron of this form can be obtained artificially by special devices without letting fall some weeping branches of species such as indigo.Umbrella shape can be very diverse: a dome, more or less pointed.It can be quite blurred contours.

Forming crown

Almost all kinds of crowns of trees that grow in city parks or gardens, require proper formation.This is achieved by pruning.Of the several existing crown formation is the most versatile method of sparsely-tier.This method is applicable to all pruning fruit trees and park culture.

The essence of this method is to make timely pruning, leaving a trunk 10-12 lateral branches, lines extending from the trunk at various levels with an interval of 15-20 cm. One-two-year nursery seedlings are sold to generate a firsttier of several side branches.Then the formation of the crown is produced with the growth of the plants.Considering that the increase in the first year the tree is small, forming the crown pruning is carried out only in the spring for the third year.The trunk should be cut by about
meter height from the beginning of the first level, not forgetting to leave it about 10 kidneys, of which there will be new summer side branches and twigs continue.

spring of the fourth year of sprouted new branches leave some of the most robust, arranged in a circle, removing the rest.It will be the second tier of the crown.Over the next two years, also form the third tier of 1-2 branches.At the height of 4-4.5 m tree growth is stopped, truncating the trunk above the base of the strong upper branch.Formation of the trees at this stage is considered complete.Proper pruning allows you to get a great tree, and the kind of photo that delivers true aesthetic pleasure.