Potted osmanthus should be short and strong. Plants with thick trunks and well-proportioned branches and leaves. Potted soil needs loose and fertile sandy loam with good drainage. Too sticky or too loose soil is not suitable for osmanthus growth. Generally, 50% humus soil, 40% garden soil and rice bran ash 10% are mixed.

Osmanthus fragrans shoots in spring and autumn every year, but bamboo shoots are the best. Generally, it germinates in March, new shoots develop in late April, grow into semi-old and strong branches at the end of June, form flower buds at high temperature in August, and bloom at the end of September. The next year, there were flowers on the branches, but the flowers were few and the quality was poor. So it needs pruning once after flowering in autumn. When pruning, according to the growth potential of the plant, the branches that grow too densely should be properly trimmed so that thick branches are evenly left on each side. Too dense branches will affect photosynthesis, lead to physiological disorders and affect the flowering of pregnant buds. At the same time, the long branches that grow in summer and autumn should also be cut off. The second pruning is carried out before the germination of early spring buds, and all dead branches, weak branches and pests and diseases after winter are cut off. If the plant is too high, there are few branches in the lower part, and the plant shape is not beautiful, the top of the trunk can be trimmed to make the lower part germinate adventitious buds and new branches. In addition, it is beneficial to the growth of spring buds and flowers to cut the budding branches frequently and concentrate nutrition during the growth period.

Osmanthus fragrans is not strict with light, but it blooms in a sunny and well-ventilated environment with strong fragrance. Long-term storage in a semi-cool place will lead to fewer flowers and light fragrance. Potted osmanthus fragrans is not cold-resistant, so it should be placed in a sunny place indoors in winter, and generally it can overwinter above 4℃. Poor illumination and low temperature are easy to cause defoliation. In late March of the following year, potted plants can be moved to the outdoor sunny place for maintenance.

Strengthen fertilizer and water management in the growing period. Osmanthus fragrans is potted in a big pot, and it is usually watered once every 4-5 days in spring and autumn. Osmanthus fragrans is humid, especially in the autumn flowering season. Too wet will cause falling flowers. Keep the basin moist at ordinary times. Summer is the peak of plant growth. When the temperature is high, the pot soil is easy to water, so it should be watered enough. Water it once every morning, and you can water it again at night according to the degree of dryness and wetness of the basin soil. In rainy season and summer shower, water should be poured into the side basin in time to avoid root rot.

Osmanthus fragrans likes fertilizer very much When sprouting in spring, 30% cake fertilizer and human excrement and urine should be applied every 7- 10 days to promote germination and branching. After July, apply 30% decomposed chicken and pigeon manure water or fish viscera water, or add 0. 5%- 1% calcium superphosphate is added to the above fertilizer solution to promote the growth of flower buds and produce good flowers. Don't fertilize immediately when the pot soil is too dry, water it until the pot soil is slightly wet, so as not to burn the leaves and make them curl.

There are three main reasons why flowers can't bloom:

First, osmanthus fragrans is still in the vegetative growth stage. If the planted osmanthus tree is cultivated by seedlings (sowing), it may be in the stage of nutritional production for a long time and not reach the physiological (reproductive) age, so it will not bloom. Therefore, experts suggest buying osmanthus trees cultivated by grafting or cutting, which can shorten the vegetative growth period and raise them as much as possible.

Pre-flowering stage

Second, there is not enough light. Osmanthus fragrans is a light-loving tree species, so it can't be planted in places lacking sunshine or shade. Even grafted or cut osmanthus trees, if they don't get enough sunshine for a long time after planting, will delay the vegetative growth again and again, and will also affect flowering; If it is a osmanthus tree cultivated by seedlings, it is even more difficult to have a chance to bloom. If the osmanthus tree has blossomed before it is bought back, it will also reverse the reproductive growth into vegetative growth, so that the original flowering plants will stop flowering.

Third, the amount of phosphorus and potassium fertilizer is not enough. If only or excessive nitrogen fertilizer is applied, it will only promote the vegetative growth of osmanthus trees and delay the flowering time; The application of phosphorus and potassium fertilizer can promote the transition from vegetative growth period to reproductive growth period and make it blossom. Therefore, for newly planted osmanthus trees, in addition to proper nitrogen application, more compound fertilizers containing nitrogen, phosphorus and potassium should be applied, and more phosphorus and potassium fertilizers should be applied in the reproductive growth period. At the same time, we should also pay attention to the daily management and protection of pests and diseases.

If the maintenance is carried out according to the above aspects, osmanthus trees will definitely blossom in bloom.