Reasonably watering
Whether watering is reasonable or not is important for the growth of chrysanthemum. Watering should be done timely. Chrysanthemums must be well watered to grow well and have a large bloom, especially when buds appear. Watering in the fall should determine the number of times of watering and watering according to the different climatic conditions of chrysanthemum growth. If it is raining, it is not necessary to water, but on cloudy days it is less. On sunny days it is more poured. Watering should be done slowly with a fine-eye watering can. Do not pour with torrential water. Do not use too much water for each watering. Otherwise it will cause rot, yellow, and even the death of the whole plant.
Appropriate fertilization
Before the fertilization should be loose a loose soil, should not be watered; should be in the basin when the soil is dry than the fertilizing liquid, fertilization should not be applied to the branches and leaves when the fertilizer, otherwise it will make the leaves yellow; timely after the fertilization with watering pot to the seedlings Spray water to flush off fertilizers that have been contaminated on the leaves. By the beginning of October, observe the growth of different varieties, and use a mixed solution of 0.1% urea and 0.05% potassium dihydrogen phosphate as the water and fertilizer, topdressing once every 5 days, or alternatively using organic liquid fertilizers, and the above-mentioned fertilizer mixture solution can also be used. Evening spray is used as a top dressing, spraying once every 3 days. During this period, leaves should be inspected every morning. If the veins are widened, the color becomes lighter, and the leaves are stiff and brushing, they should lose weight. Observe the plants. If the whole plant has the thickest point from the first second leaf segment, the flower head will bloom and the color should be stopped.
Careful pruning
In order to make chrysanthemum grow evenly and branches stand upright, pillars are often set up. The pillars are usually bamboo or stalks, and the branches are tied with twine, one for each branch. Sometimes individual plants have not seen their buds until the budding stage, and the growing point is still growing new leaves, resulting in dense plant nodes, clusters of buds and not budding, this situation is known as "Liuyetou." The shoots forming the "willow buds" should be removed immediately and the lateral buds below the main buds should be used instead. If you let it grow and flower, the flower shape will not be perfect. When the flower buds are translucent and the core valve is fully developed, cut off the overlying pillars and place the flower heads tightly together so that the flower shape is correct and the direction is the same, avoiding head and twist. Individual petal varieties are weak, can be in the upper end of the branch of the Department of 20 wire section, plate into a few spiral (commonly known as the prop child) support to increase the appearance.
After the flower buds are opened, the white flowers and green flower varieties should be moved to the shade or shaded by other measures to keep the flowers green. Otherwise, the colors are not correct. When the dark flowers are buds, strong light is needed and some organic substances are added. Liquor fertilizer can make flowers rich and colorful.
Pest control
Autumn potted chrysanthemums have more pests and diseases. The most serious diseases occurred were: leaf spot, black rust, brown spot, powdery mildew and aphids, spider mites, and whitefly.
Leaf spot can be treated with 1% Bordeaux mixture or 50% zein powder plus 1200 times water spray at the beginning of the disease. Once a week, it can be sprayed three times.
In the early stage of the onset of black rust, 50% thiophanate powder plus 1000 times water (or 50% carbendazim plus 800 times water) can be sprayed once a week for 3 consecutive times.
When powdery mildew occurs in the chrysanthemum, the white, round and round spots on the damaged leaf surface gradually grow into one piece. The initial stage of disease can be sprayed with 50% tune-toxin 1000 times solution, or sprayed with 0.3-0.5 degree lime sulfur mixture. The effect is better.
Aphids are very harmful and can be sprayed with 2000 times of 40% omethoate or 2000 times of 2040% chrysanthemum emulsion.