Annual flowers need less nitrogen fertilizer at seedling stage and gradually increase with growth. Biennial and perennial flowers need more nitrogen fertilizer in spring. Ornamental flowers need more nitrogen fertilizer during the whole growth period. Flowers and fruit plants need less nitrogen fertilizer at flowering stage, and excessive application will delay flowering or drop flowers and fruits.
Phosphorus is an integral part of the flower core. Phosphorus is also an essential element for photosynthesis, protein, fat synthesis and carbohydrate conversion. Therefore, when phosphorus is deficient, the protein synthesis of plants is blocked, and the division and growth of new cells are affected, resulting in slow growth of buds and roots, small leaves and few branches or leaves, especially short plants with dark green leaves and slow growth. Less flowers also affect the results. Flowering and ripening are delayed. Adding phosphate fertilizer can promote the reproductive growth of flowers, which are large, colorful and fruity.
Manganese is the structural component of mosaic tapestry. Manganese also participates in physiological activities such as photosynthesis and nitrogen utilization, so when manganese is deficient, the green structure of leaves is destroyed and disintegrated, and young leaves appear green-deficient necrotic spots.
Potassium participates in the physiological activities of flowers. In the process of carbohydrate synthesis and transportation, potassium promotes the synthesis of cellulose and lignin, so potassium can make the stems of flowers strong, improve the ability of disease resistance, drought resistance and cold resistance, and make flowers bright. When potassium is deficient, the plants are weak, the leaves are small, the leaves shrink, and the tip and edge of the leaves often appear scorched.
Calcium is the element that constitutes the cell wall. When calcium is deficient, the young meristem of plants is damaged, which affects cell division, cannot form new cell walls and inhibits growth. In severe cases, young organs (root tips and stem tips) fester and die. Calcium can reduce the acidity of soil, and lime can loosen the soil in heavy soil. There is a lot of calcium in the eggshell, so you can plant family flowers after the eggshell is broken.
Magnesium is a component of chlorophyll. Magnesium deficiency often makes leaves yellow, mottled and green-deficient, veins remain green, veins turn yellow, sometimes reddish purple, and when magnesium deficiency is serious, brown spots will form necrosis.
Sulfur is a kind or part of protein. Sulfur is also related to the synthesis of chlorophyll, so when sulfur is deficient, the plants are short, the leaves of tender leaves turn green, and in severe cases, the veins turn green and the whole leaves turn white.
Iron is the element that flowers synthesize chlorophyll. Iron deficiency can make the leaves of plants turn green, and the veins are still green, and the symptoms of young leaves are particularly obvious. In severe cases, the leaves of several families will turn milky white. When the PH value in the soil is alkaline, it is easy to lack iron. If you find iron deficiency symptoms, you can apply ferrous sulfate, also called black alum, with a concentration of 0. 1%-0.2%.
Boron can promote flower opening. Boron can promote flowering, pollination and fruiting, and promote the transport of sugar in plants. The growth of plant roots also needs boron. Although the demand for boron in plants is very small, if it is lacking, the young leaves will lose their green color, the leaf edges will curl upward, and the growing points of the top leaves and young roots will be necrotic. When boron is deficient, 0. 1% boric acid aqueous solution can be sprayed on the leaves for external fertilization, which can make the flowers bright and the fruits big.