Know how to maintain flower seedlings and the key points of fertilizer application for potted flowers

1. According to the season, spring and summer is the peak period of flower growth, during which the plant grows rapidly, the metabolism is exuberant, and more nutrients are needed, so the three-element fertilizer based on nitrogen fertilizer should be applied to make the root system developed and strong, enhance the absorptive capacity and promote the branch growth. to blossom and bear fruit. After summer, if you continue to apply nitrogen fertilizer, it will be disadvantageous to plant development and affect flowering and fruit. moreover, excessive application of nitrogen fertilizer is easy to cause disease and insect damage, or make stems and leaves weak and flowers not colorful, so before the plant enters the reproductive growth period (flower bud differentiation), the application of nitrogen fertilizer should be stopped. The plant grows slowly in autumn and the amount of fertilizer is reduced. In order to improve its ability of resisting cold and overwintering, a small amount of phosphorus and potassium fertilizer can be applied. Phosphorus and potassium fertilizers are not only beneficial to the reproductive growth of plants, but also promote strong plants and bright flowers. Winter flowers enter the dormant period, do not apply fertilizer, but some potted flowers that enter the house in winter can continue to grow, in this case, a small amount of fertilizer can be applied to meet the growth needs.

2. According to plant growth, strong plant physiological activity, fast growth, strong absorption capacity, need a lot of nutrients, should be frequently applied nitrogen fertilizer. The growth of diseased and weak plants is slow, the metabolism is not prosperous, the absorptive capacity is poor, less fertilizer is needed, and less or no fertilizer can be applied. Flowers also have the problem of deficiency without supplement, if the concentration of nutrients in the soil is high, it is easy to cause reverse osmosis and cause plant root burning death.

3. Fertilization according to flower growth period ① fertilization in flower bud stage. Flowers need a lot of nutrients in the bud stage, and fertilizers based on phosphorus and potassium fertilizer are needed to promote flower bud differentiation and blossom with more buds. However, it is not suitable to apply fertilizer when the flowers bloom, so as not to induce new branches prematurely, force the flowers to die early and shorten the flowering period. Fertilization during the fruit expansion period of ②. As a result, flowers and trees need a lot of nutrients after fruit setting, but when the fruit is not settled, do not apply fertilizer, so as not to cause a large number of fruit drop. After the fruit is settled, especially during the fruit expansion period, phosphorus and potassium fertilizer should be applied, which can not only make the fruit grow rapidly, but also help the fruit stalk to be stout and not easy to fall.

4. Fertilize cuckoos and masts according to the types of flowers. Do not apply alkaline fertilizers. The flowers that need to be re-pruned by ② every year should increase the proportion of phosphorus and potassium fertilizer to facilitate the germination of new branches. The flowers with foliage as the main part of ③ should pay more attention to nitrogen fertilizer. ④ for chrysanthemum, dahlia and other large flowers, need to apply an appropriate amount of complete fertilizer during the flowering period to promote full flowering and beautiful flowers. The flowers which are mainly viewed by ⑤ should properly control the fertilizer and water during the flowering stage and apply enough complete fertilizer in the strong fruit stage in order to bear a lot of fruit. When ⑥ fragrant flowers enter the flowering stage, appropriate amount of phosphorus and potassium fertilizer should be applied to enhance the fragrance of the flowers.

5. Note: ① can not fertilize immediately after changing pot soil. Potted flowers grow in the pot for a long time, and the nutrients in the soil will be exhausted. It is necessary to change the pot soil in time and increase the base fertilizer to facilitate flowering and fruiting. However, the roots of the newly planted plants after changing pots are mostly damaged, and their ability to absorb fertilizer and water is weak, so they can not be fertilized so as not to stimulate the wound, cause rotten roots and affect the survival rate. ② holds that the basin soil is suitable for drying and humidity. Fertilization should grasp the timing and dry humidity of the basin soil, fertilization when the basin soil is slightly dry, the fertilizer liquid will directly seep into the soil and be absorbed by the root system; if the basin soil is too dry, when there is a gap between the soil and the basin wall, the fertilizer liquid will be lost from the gap. On the other hand, fertilization can easily lead to the death of rotten roots when the basin soil is too wet. ③ was supplemented with extra-root fertilization. When the climate and basin soil conditions are not suitable for fertilization or the effect of fertilization is small, the means of extra-root topdressing can be adopted. Practice has proved that better results can be obtained by topdressing outside the root in this case.