When will camellia be fertilized? What fertilizer does camellia fertilize?

According to the different requirements of camellia growth and flowering, the following fertilization periods should be mastered: the first fertilization should be carried out in February and March, when most camellia begin to sprout, and nitrogen fertilizer should be applied. Promote the germination of new buds and new buds. The second fertilization should be carried out in April and May,

In April, nitrogen fertilizer and potassium dihydrogen phosphate can be alternately applied to promote the healthy growth of new branches and provide necessary nutrition for differentiated flower buds;

In May, all the new branches have been lignified, and the flower buds have begun to differentiate into buds. At this time, phosphate fertilizer should be applied to increase the nutrients needed for bud formation. The third fertilization should be carried out from late June to mid-July. At this time, the temperature rises gradually, the plants grow slowly, and the nutrient absorption is low. Dilute fertilizer solution mainly containing nitrogen fertilizer should be applied. If the concentration is too high, it is easy to burn the fibrous roots.

Late July to August is the high temperature dormancy period of camellia, so chemical fertilizer can't be used. The fourth fertilization should be carried out from September to the middle of 10. At this time, Camellia plants enter the second growth period, and the sap activity is vigorous, and the roots constantly absorb water and nutrients, forming auxin through photosynthesis.

Therefore, in order to loosen the soil and topdressing in time, nitrogen fertilizer, phosphorus fertilizer and 1% calcium superphosphate can be used as mixed fertilizer solutions to meet the nutrients needed for autumn growth, enhance the cold resistance of plants in winter, and lay a good foundation for the flowers to bloom next spring.

Fertilization method of potted camellia

(1) Nitrogen fertilizer accelerates spring shoots.

Camellia usually begins to shade the spring shoots around 18℃. At this time, the bud-killing fertilizer with nitrogen as the main fertilizer should be applied every 10 day until the spring shoots begin to lignify. Conditional, also can use potassium dihydrogen phosphate 1000 times solution, 1% urea and 300 times rice vinegar mixed diluent for foliar spraying. After repeated spraying of roots and leaves, the spring shoots will grow very luxuriantly, the leaves can be stretched to the maximum extent, and the branches can accumulate rich nutrients, which creates good conditions for flower bud differentiation.

(2) Increase the application of phosphorus and potassium fertilizer to promote flower bud differentiation and form flower buds.

Camellia will have a short semi-dormancy period after the spring shoots are fully drained and lignified. At this time, camellia changed from vegetative growth stage to reproductive growth stage, and flower buds began to differentiate. In order to make camellia bear more buds, it is necessary to apply more phosphorus and potassium fertilizer, and not to apply nitrogen fertilizer or less. If the germination of camellia plants is the main thing, nitrogen fertilizer is still the main thing, and no or less phosphorus fertilizer is applied. Spraying potassium dihydrogen phosphate, a small amount of borax and rice vinegar diluted every/kloc-0.000 times on leaves can not only control the overgrowth of camellia branches, but also promote and shorten the flower bud differentiation time, which is beneficial to bud formation.

(3) Fertilization is not suitable in midsummer, let alone concentrated fertilizer.

It is hot in midsummer, and camellia grows slowly or is in a semi-stagnant state. It is not suitable to apply fertilizer at this time, especially pay attention not to apply thick fertilizer. If the soil is barren, it can be combined with watering and slightly applied with dilute liquid fertilizer to improve the soil quality.

(4) Appropriate application of phosphorus and potassium fertilizer in autumn.

Autumn is crisp and belongs to the nutrient accumulation period of camellia plants. In order to overwinter safely, the mixed fertilizer of phosphorus and potassium fertilizer can be applied once every half month with foliar spraying to promote plant health and improve the cold resistance of camellia.

(5) Dilute liquid phosphorus and potassium fertilizer should be applied in winter.

Camellia in winter enters a semi-dormant state. Camellia has entered the cellar, and its vegetative growth has entered dormancy, so it doesn't need too much fertilizer. However, its reproductive growth has not completely stopped, and it is in the season of flowering or preparing for flowering, so it should be combined with watering and applying dilute phosphorus and potassium liquid fertilizer. Don't apply thick fertilizer.

Matters needing attention in potted camellia

(1) Time of applying liquid fertilizer

Generally, liquid fertilizer is applied at night when the temperature drops and the soil is dry. The next morning, "backwater" is carried out, that is, whether the soil is dry or not, it should be watered 1 time to dilute the fertilizer solution in the soil layer for root absorption.

(2) Shading with liquid fertilizer

The strength of liquid fertilizer depends on the length of fertilization interval, variety, season and plant growth. Tea peanuts are applied once every other week or 10 days for a long time. If the fertilization interval is long, it can be applied with 10 times of water mixed with moderate concentration of fertilizer water. If the fertilization interval is short, the concentration should be reduced. Yunnan tea and tea tree are vigorous varieties, and their dosage should be increased appropriately. Young plants, weak plants and rare varieties can be lightly applied or not. The first fertilization in spring should be light, and then gradually increase. In rainy season, the soil is often wet. In sunny days, fertilization can't be done until the soil in the basin is dry. If it rains continuously and the soil is not dry, you can spray chemical fertilizer on the leaves. If fertilization is not applied in midsummer, fertilization will start when the high temperature expires, and it will be diluted for the first time, and then gradually added. Late autumn and winter will gradually ease or stop.

(3) Remedial measures for excessive or insufficient fertilization

For example, Camellia leaves turn yellow, the luster decreases, the growth stagnates, and the buds shrink, which is a symptom of excessive fertilization. Light will affect the growth, development, branching and flowering of camellia, and heavy will cause physiological drought, leading to the withering and death of branches and leaves. At this time, fertilization must be stopped, and soil should be changed or soaked if necessary. For example, slow growth of camellia, small and thin leaves, yellow leaves and thin buds are all symptoms of insufficient fertilization. The frequency and concentration of fertilization should be appropriately increased, but not too concentrated or too diligent at once.

(4) Camellia should not be fertilized in several cases.

Generally speaking, camellia buds are colored and blooming, so fertilization is forbidden. Otherwise, it will cause falling flowers and falling buds. High temperature in summer, semi-dormancy in winter, not suitable for fertilization, so as not to cause root rot. Camellia branches are too long, leaves are dark green or drooping for a long time (except some drooping leaves), which means that fertilization is too much or the roots are moldy, so fertilization should be stopped immediately. Newly transplanted camellia or diseased camellia should not be fertilized. After new and diseased plants are restored and cured, thin fertilizers should be applied. In addition, camellia planted in autumn is generally not fertilized that year.