It can be planted alone on the lawn, opposite the entrance of the building, in front of the south window of the building or on both sides of the road, or mixed with evergreen conifers as a foreground tree. In traditional houses, Magnolia grandiflora is often planted with begonia, Yingchun, Peony, Osmanthus fragrans, etc. as "Jade Hall is rich in spring", which means auspiciousness, wealth and power. Magnolia grandiflora is a deciduous tree, which is as high as 15 meters, usually cultivated only about 8 meters, and its crown is oval or nearly spherical; Young branches and buds are hairy; Leaves obovate-oblong, entire; The flowers are large, pure white and fragrant, and the calyx and petals are similar, with 9 pieces; Flowers bloom first, then leaves fall. Flowering in March-April and fruiting in September-65438+1October. Magnolia grandiflora has a variety, tepals 12, and the outside is purple.
Magnolia likes light, but is slightly resistant to shade. I like warm and a little cold. I like fertile, moist and well-drained weakly acidic soil (pH 5 ~ 6) and can grow in slightly alkaline soil. Roots are fleshy and afraid of flooding. Magnolia grandiflora has slow growth, symmetrical branches, developed terminal buds, strong dryness and symmetrical natural branches. The terminal pure flower bud mainly blooms on short and medium branches, and the flower bud belongs to summer and autumn differentiation type, that is, June-July is its concentrated differentiation period. Magnolia is usually allowed to grow naturally and does not need special shaping.
When raising seedlings in nursery, the top of trunk need not be cut short. When pruning in dormancy every year, the lateral buds near the tip of the trunk should be erased in early spring to avoid fighting for branches; Or pruning the competitive branches at the top in summer to weaken their growth, ensure the growth advantage of the top of the trunk and promote the growth of young trees; Leave more main branches on the trunk properly, so that the upper and lower main branches are scattered with a certain space and sufficient interval. Shorten the ends of branches appropriately, and leave external buds at the cut to make the branches expand outward. Light-cut main branches grow slowly, easy to form short and medium branches and bloom early. After planting Magnolia grandiflora, we should continue to maintain the advantages of the top of the trunk and promote the growth of young trees, while leaving more main branches and cutting less. Let the remaining branches on the trunk that are not selected as the main branches grow naturally, and after a year of relaxing the branch potential, flower buds can be formed on them. For redundant branches, such as too dense branches and overlapping branches, it is really unnecessary to keep them and do a small amount of thinning. If there is a serious branch vacancy, light cutting and short cutting can be used to promote branching, but the resulting new branches are generally not long, so we must be cautious about whether to stay or not. In general, there is no need to control the growth potential of each branch. In case of overgrown branches, you can change your head and retract it appropriately. When pruning the main branches left on the trunk every year, the lower branches should be made long and the upper branches should be made short to maintain a conical tree shape and increase the light receiving area. When the tree grows to 4 ~ 5 meters, the lowest branch of the trunk can be gradually thinned. Generally speaking, the height of the trunk is determined by the size of the space where the tree is located. If the space is open, the trunk can be high. If the space is small, the valve stem can be lower. However, it is generally appropriate to leave 1.5 ~ 2 meters under the branches.
When trees are young, there are many upper branches, so when trees grow up, adjacent branches should be dispersed according to the specific situation, and the main branches should not overlap and be separated by a certain distance. The main branches and auxiliary branches that were too dense before should be gradually sparse to facilitate ventilation and light transmission, and the number of main branches left by the whole tree is 4 ~ 5. In order to continue to expand the crown, the main branches and extension branches should be cut off again. Then choose to leave lateral branches on the main branch, the distribution of lateral branches on the main branch should be left and right, with an interval of 20 ~ 30 cm, and the extended branches of lateral branches should be lightly cut to make more short branches and more flowers. Other branches that are not left as side branches are decided whether to stay or not according to the size of space. If the space is still large, it can be reserved temporarily. In order to control its growth, strong people can cut off its middle and lower branches; Weak ones can slow down without cutting. The branches treated in this way can not only occupy effective space, but also increase the amount of flowers. With the continuous expansion of the tree and the increase of branches, these auxiliary branches and useless branches should be gradually sparse.
If the space is small, the extra branchlets on the side branches should be thinned out as soon as possible. Magnolia grandiflora has weak healing ability, so it can't be cut more when it is maintained and trimmed. Generally, you only need to sort out the miscellaneous branches. If the growth potential of branches is too weak, you can choose stronger branches for head change and local renewal, and try not to cut them short. Maintenance and pruning should be carried out at the early stage of leaf bud elongation after flowering, not before flowering in early spring or after defoliation in autumn, otherwise dead piles will be left.