Cedar is an excellent garden tree, which is tall and graceful, and is one of the five largest garden trees in the world.
It is most suitable for planting in the center of lawn, hall of building, square center or both sides of main building, and at the entrance of garden.
In addition, it is also very spectacular to plant on both sides of the garden road to form a tunnel.
Cedar is an evergreen tree, more than 50 meters high.
The crown of the tree is conical.
Bark is grayish brown, scaly, irregularly whorled with large branches and spreading and drooping branchlets.
Leaves acicular, spirally scattered on branches or clustered on short branches.
Dioecious, some of the same plants, hermaphrodite.
Conical, oval, oval.
Cedar has three major strains: flat branch type, vertical branch type and upturned branch type.
Cedar likes light and has a certain shade tolerance, but it is best to have enough light and heat at the top, otherwise it will grow poorly and have a strong shade tolerance when it is young.
I like warm and cool climate and have a certain cold tolerance.
Strong drought tolerance, avoid water accumulation.
I like deep soil with good drainage, adapt to slightly acidic and alkaline soil, and can also grow on sticky and barren land.
Cedar is a typical single-axis branching tree species with obvious axis and rapid growth.
It grows twice a year, germinates in mid-April, grows new shoots in May-June, stops growing in July-August, grows for the second time in September and stops growing in June-10/10.
Cedar is shaped by low branches and central leadership.
The general requirements of shaping and pruning are: the tree is upright, tall and straight, tower-shaped or wide-tower-shaped, with obvious axis, and the lower branches are close to the ground and distinct layers.
In the process of tree cultivation, we always rely on the terminal buds of the central leadership, but the central leadership is soft and often bends, and it is most likely to be broken by the wind and destroy the tree, so we should tie the top with bamboo poles in time.
If the tip is damaged, find a suitable side branch bracket nearby as soon as possible.
The plastic belt should start from the first branch in the lower part. The lower the branch point, the better. The lower the branching point, the better. Therefore, the big branches and twigs at the lower part of the crown should be kept to make them naturally close to the ground, and the branches at the lower part must not be cut off, otherwise it will be self-defeating from the perspective of garden viewing.
Because of the centrifugal growth of trees, its lower branches can not be regenerated, so it is necessary to properly protect the lower branches of cedar.
Since Cedar begins to cultivate skeleton branches from seedling stage, its shaping and pruning are closely combined with annual maintenance and pruning.
In general, plastic pruning can be done in late autumn (10 ~1month) or early spring (February ~ March), generally once a year, without excessive pruning.
Cedar is naturally pruned well, and thinning is the main pruning method. The objects of thinning are mainly shady weak branches and a few branches with inappropriate orientation, and other methods such as hanging and traction are often used to cooperate, so the pruning amount is very small.
Cedar is a positive tree species, and the branch spacing should not be too small. With the continuous increase of its volume, the branch spacing should also be expanded accordingly, so that it has distinct layers, beautiful plant shape and good ventilation and light transmission.
Cedar with uneven branch density and uneven crown shape can be thinned in dense parts, or the sparse parts can be densified by short cutting new shoots, but this short cutting cannot be used for many purposes and can only be carried out in spring (April).