Magnolia grandiflora is a beautiful ornamental plant with tall and straight posture, shade, bright leaves, evergreen seasons and fragrant flowers. Suitable for solitary planting, cluster planting or in front of trees in the garden, and can also be used as street trees.
Magnolia grandiflora is an evergreen tree with an origin as high as 30 meters, a straight tree shape and a broad conical crown.
Bark is dark brown or gray, thin and scaly.
Branchlets, leaves and petioles are densely covered with brown short hairs, and there is no hair under young leaves.
The leaves are thick leathery, alternate, oval, obovate or oblong, entire, dark green, and shiny on the front.
The flowers are white, with solitary branches at the top, large petals, generally 6 petals, about 20 ~ 25 cm in diameter, and fragrant.
Magnolia grandiflora is a subtropical tree species, which is light-loving, semi-shade-tolerant and has a warm and humid climate.
Cold-resistant, suitable for deep, fertile and moist soil.
Magnolia grandiflora 1 ~ 0 is twice a year, with flower buds sprouting in early April, leaf buds sprouting in mid-April, new shoots growing in April-May, flowering in May-June, new shoots stopping growing in June-July, fruits ripening in September-1October, and a few autumn shoots (secondary branches) appearing at the same time.46600.0000000006
The branching form of Magnolia grandiflora is very special. At first, it was an obvious uniaxial branch. After entering the mature stage, due to the flowering of the terminal bud, it will evolve into a compound branching form sooner or later.
Generally, the plants propagated by grafting are transformed earlier than those propagated by sowing, but even the plants of the same age and the same propagation method often have different transformation time, so the branches of Magnolia grandiflora cultivated at the same time are often different.
Therefore, the shaping time should depend on the natural growth of trees, which can adopt the trunk shape of central leadership or multi-leadership.
In the young stage, it is dry and can grow in the middle part. At the same time, it is necessary to cultivate skeleton branches, not too much pruning, just thinning out a few branches with bad orientation or bad opening angle.
The plastic band can be determined as required, generally1~1.5m. After reaching the branch point, if it is still uniaxial, the central trunk with higher branches can be cultivated, and the secondary main branches of the extension part of the middle trunk can be selected, while the redundant main branches or secondary main branches at the lower level can be thinned out as appropriate.
For those branches that evolved into syncline branches earlier, it is advisable to cultivate multi-tap trunk shapes, and pay attention to the symmetry and branch spacing of their main branches to maintain a good tree shape.
Magnolia grandiflora has weak healing ability and should not be pruned too much, especially to protect the terminal buds of branches at all levels.
Maintenance and pruning are mainly thinning. Sometimes, in order to control the height of main branches and lateral branches (especially seedlings), a small amount of head changing and short cutting can also be used.
Because the germination ability is not strong, there is no need to control the growth of new shoots
Both the setting and the maintenance and pruning in the mature period should be carried out before the arrival of winter after the fruit, when the flower bud differentiation has been completed, and the differentiated terminal bud can be clearly distinguished from the undifferentiated terminal bud. As long as the differentiated terminal bud is preserved as far as possible, maintenance and pruning will not affect its flowering.