How to regulate the flowering period of osmanthus

To achieve the success of osmanthus flowering regulation, it is necessary to understand and master the time and climate conditions of potted osmanthus flower bud differentiation.

The natural flowering period of osmanthus is closely related to the morning and evening after the jacket is cooled. In general, the autumn temperature is early, and the flowering period is early; If the temperature drops late, the flowering period is delayed. Usually the autumn is followed by intermittent rain and wet weather, which is a prerequisite for early flowering of osmanthus flowers.

Cooling is associated with rainfall. After rainfall, the depression decreases and the relative humidity of the air increases, which is more conducive to the blooming of osmanthus flowers. Tsukufuku et al. (1995) argue:

Ground planted osmanthus trees, the minimum temperature is lower than 170C, a total of more than 4 days, the highest temperature is more than 26 days, accompanied by the rainfall process, osmanthus can open. Shen Xiajing (1991) believes that potted osmanthus trees can bloom after 14-16 days under the temperature conditions of 13-16.

Understanding and mastering the comprehensive situation of the natural flowering period of osmanthus on microclimate conditions provides a scientific basis for the regulation of osmanthus flowering period. Due to the differences in year, region, osmanthus variety and maintenance and management conditions, there are also great differences in the differentiation time of osmanthus flower buds. Therefore, understanding the time of bud differentiation of Osmanthus osmanthus is the key to the regulation of Osmanthus flowering.

According to Chen Yingqi (1984) observed in Suzhou, from early September to mid-September, the differentiation of osmanthus flower buds was basically completed; According to Wan Yunxian (1988) observed in Wuhan, osmanthus flower buds formed in mid-August; According to Su Zhenpeng's observation in Beijing for many years, osmanthus flower buds have been formed at the end of June and early July.

In order to make osmanthus bloom on the required date, it is necessary to master the flowering period control technology, and take advantage of the favorable conditions for potted osmanthus to be easy to move, change the flowering period, and advance or delay the opening of osmanthus flowers. 1.The relationship between natural flowering period and temperature and humidity After the autumn rainfall, the temperature decreases, and the relative humidity of the air increases, which is conducive to promoting the opening of osmanthus trees, and the minimum temperature of ground-planted osmanthus trees is lower than 17 for more than 4 days, accompanied by rainfall, osmanthus will open; Potted osmanthus trees are between 13 and 16, and after about 15 days, the osmanthus will bloom.

2.Flowering control technology To make the osmanthus open in advance, you can send the potted osmanthus into the low temperature room, reduce its ambient temperature, spray water 1 to 2 times a day, maintain 75% air humidity, treat 15 to 17 days, and the osmanthus will open as scheduled. When it is necessary to postpone flowering, you can move the potted osmanthus into the greenhouse to reduce the temperature difference between day and night, maintain a low relative humidity of the air, and delay the development process of flower buds, which can achieve the purpose of delaying the flowering period.

The flowering period of osmanthus is too short, in fact, mastering 4 can prolong the flowering period.

Osmanthus generally blooms in autumn, that is, in September to October, and the flowering period of the general variety is not long, only 20-30 days, but the fragrance is strong. There is a special variety, the four seasons of cinnamon in autumn, can bloom sporadically throughout the year, bloom many times a year, the flowering period is very long, can last for 6 months, but the fragrance will be weakened. Variety and climate can affect flowering period.

Osmanthus flowering period: September to early October.

The flowers are extremely aromatic; calyx about 1 mm long, lobes slightly irregular; corolla yellowish-white, yellowish, yellow or orange-red, 3-4 mm long, corolla tube only millimeter long;

The stamens are borne in the middle of the corolla tube, the filaments are very short, about mm long, the anthers are about 1 mm long, and the septum is slightly extended at the tip of the anthers with an inconspicuous small pointed tip; The pistils are about millimeters long, and the columella is about millimeters long.

Garden osmanthus is native to the eastern Himalayas of southwest China, and is also distributed in India, Nepal and Cambodia. Wild osmanthus grows in southwest China, Sichuan, southern Shaanxi, Yunnan, Guangxi, Guangdong, Hunan, Hubei, Jiangxi, Anhui, Henan and other places.

Different varieties of osmanthus have different flowering times. Most of them bloom between September and October, but this variety blooms throughout the year, but only in small quantities. The flowering period also has a lot to do with the region, with Shanghai, Jiangsu and other places opening in October, Beijing, Hebei and other regions opening in September, and the northeast region will open in August.

Below is the specific flowering time of a variety.

1.Four seasons laurel2.Cinnamon

Golden cinnamon4.Silver cinnamonMiscellaneous

In addition, osmanthus sometimes has a slight difference in flowering time depending on the planting area. For example, in Shanghai, Anhui or Jiangsu, it usually blooms in October, while in the northeast it basically blooms in August, and in Beijing, Tianjin, Hebei it blooms in September, and so on.

All in all, osmanthus will not bloom if it is not at the age of flowering.

Osmanthus as a kind of flower plant, has a very strong aroma, the so-called osmanthus ten miles of fragrance, many people have appreciated the rich fragrance of osmanthus, many people are also very willing to plant osmanthus in the open-air balcony at home or in the small courtyard of the home, so that the fragrance of osmanthus can float into the house, making people feel physically and mentally happy. But how can we prolong the flowering period of the rose, so that the rich fragrance of this osmanthus flower can last for a longer period of time.

First, since the soil wants to let osmanthus survive for a longer period of time, we must first understand some of the growth habits of osmanthus and the characteristics of its growth, osmanthus as a woody plant, its growth is relatively tall, and the growth is also very fast. However, the flowering period of osmanthus is very short, only about 15 or 20 days.

But osmanthus is actually a plant that can bloom in all seasons, and if you want to extend the flowering period of osmanthus, you must understand some characteristics of osmanthusFirst of all, osmanthus likes acidic soil, so at the beginning of planting, it is necessary to adjust the pH of the soil to make the whole soil acidic, which is also conducive to the growth of osmanthus

Second, do a good job of maintaining osmanthus generally in autumn will bloom, autumn osmanthus can be placed outdoors for maintenance. In autumn, you can move indoors when the petals are falling, as the temperature is too low to affect flowering. So from these, we can also understand that a large reason why osmanthus blooms in autumn is also affected by temperature.

However, in order to prolong the flowering period, we should start with the growth habits and characteristics of osmanthusFirst of all, you can keep the temperature above 15 degrees, which is conducive to the opening of osmanthus, and at the same time, osmanthus also likes sunlight, so increase the kind of full-sun maintenance, and can also extend the time of osmanthus flowering.

Third, the first two points of proper fertilization are a very important basic condition for raising osmanthus and increasing the flowering period of a rose, especially for planting osmanthus with soil pH, butIn addition to these two, it is necessary to carry out proper fertilization and maintenance, so that the flowering period of osmanthus can be longer and the fragrance of the flowers will be longer

To prolong the flowering period of osmanthus, it is necessary to replenish water in time, keep the soil moist, and appropriately supplement nitrogen, phosphorus and potassium fertilizers.

When the osmanthus blooms, it should be watered less, and if the osmanthus is exposed to the sun for too long, it should be placed in a cooler place, so that the flowering period of the osmanthus will be longer.

The flowering period can be extended, during the flowering period, we must ensure the temperature and the moisture and nutrients of the soil, otherwise the flowering period is difficult to prolong.

1. Potting soil

Like most plants, osmanthus is also suitable for growing in acidic soils, so we need to prepare slightly acidic soils with a pH value. Soil can be mixed with humus or peat, garden soil, sandy soil or river sand (ratio 5:3:2).

2. Fertilization

Fertilization is a very critical step in the process of cultivating osmanthus, osmanthus likes organic fertilizer, and flower friends who love osmanthus must have heard a sentence "to get the fragrance of osmanthus, prepare more pig manure tanks". That is to say, pig manure is often used to fertilize osmanthus, so the osmanthus will be very fragrant when it blooms.

3. Watering4. Temperature and light

How to raise osmanthus to grow well? If you want osmanthus to grow well, sunlight is also crucial, osmanthus loves sunlight and can accept 6 8 hours of light a day. The most suitable temperature for the growth of osmanthus flowers is 15 28, and the lowest temperature in winter can be -13.

However, the osmanthus seedlings in the seedling period also need a certain shade maintenance, otherwise it is easy to cause the plant to wither.

Pay attention to the management of fertilizer and water, do a good job of pruning, and prevent pests and diseases in time. The use of new high-fat film and some pesticides and fertilizers can be used to reduce the amount of use and improve the efficiency of pesticide and fertilizer use.

The reasons and countermeasures for osmanthus not blooming have the following five aspects:

First, the pH imbalance. Osmanthus trees require soil pH value, that is, they prefer acidic soil. Recently, the alkaline sewage of lime and cement brought by the construction of houses and roads in the city has leaked into the ground, resulting in more alkaline soil.

This is one of the key reasons why osmanthus does not bloom in the city. Because sulfur powder is an acidic agent for chronic soil improvement, 4 meters of holes can be dug around the periphery of the osmanthus canopy, and 1 kg of sulfur powder can be placed in the holes. Or water with 5 ferrous sulfate water every month, and use this fast-acting agent to neutralize and improve the pH to reach the normal value.

It can also be modified by foliar spraying with ferrous sulfate water. Note that you must not be in a hurry, you should take less dose and more times according to the situation, such as when it is acidic, that is, sprinkle lime powder and plant ash for pH neutralization to make it reach a normal value.

Second, the proportion of fertilizer is unbalanced. Osmanthus is a fertilizer-loving plant, but it is not more than the better, each plant has nitrogen, phosphorus, potassium and other elements of the balance of fertilizer components. There is a lot of nitrogen fertilizer, the branches are luxuriant, and the branches and leaves are long, but they just don't bloom; If there is less, the leaves are yellow and the branches are thin, which affects the absorption of phosphorus and potassium fertilizers, and does not bloom.

Therefore, the osmanthus tree tries not to use chemical fertilizer, to use more farm fertilizer, and the osmanthus tree is particularly fond of pig manure, there is a folk proverb called "to make the osmanthus fragrant, break the pig feces tank". When there is no pig manure, you can use dry cakes to soak alum fertilizer water, and the fertilizer should be applied diligently, and it should be watered every 10 days from February to mid-August.

3. The impact of environmental pollution. Environmental pollution harms plants to different degrees, and their appearances are also different. For soil pollution, attention should be paid to cleaning up the source of pollution; For air pollution, it is necessary to identify the source of toxic chemical pollution.

Osmanthus trees are particularly afraid of soot, so they must find ways to avoid soot, rinse the leaf dust, and eliminate its damage to the osmanthus tree.

Fourth, the influence of temperature and humidity. Osmanthus tree is a long-day plant, like strong light, insufficient sunlight causes branches and leaves to grow, especially during the growth period of insufficient light will bloom less or no flowering. Osmanthus trees like moist soil, but avoid stagnant water, otherwise it will cause leaf loss, rotten roots, no flowering, if drought and lack of nutrients can not keep up, the same will cause no flowering.

5. The impact of soil compaction. Soil is the material basis of plant growth, and the water and nutrients required for plant growth and development are mainly absorbed from the soil, and its quality directly affects the quality of plant growth. The osmanthus tree is rooted in the fertile loam soil, which is sure to make it thrive and bloom continuously.