How to cultivate zinnia

Hundred-day grass alias hundred-day chrysanthemum, step by step, fireball, number one red. Sex is full of sunshine. Avoid hot, better able to withstand semi-yin. It has the advantages of early drying tolerance, strong growth potential, strong adaptability and lax requirements on the soil, but it grows strong and has many flowers in the deep and fertile soil with good drainage. The optimum temperature for its growth is 20-25 degrees Celsius. When the temperature is higher than 35 degrees Celsius, the growth weakens obviously, the flowers are rare and the flowers are smaller. The main method of propagation is seed propagation, which is suitable for spring sowing (mid-late April), or cuttage propagation. The florescence is from June to October. It is suitable to use dwarf varieties of zinnia in potted plants.

Cultivation tip: you can sow seeds in mid-late April. Seedlings should be transplanted once when they grow 2 true leaves. In late May, the seedlings were planted in a basin with soil balls at a height of 10 cm, and the bottom of the basin was filled with rotten organic fertilizer or cake fertilizer and added an appropriate amount of grass ash and bone powder as base fertilizer. After planting in the basin, water thoroughly and place in the shade. Put it in a sunny place after 5 to 6 days. When the plant height is 15 cm, the heart should be removed for 1 or 2 times to promote multi-branching. In order to reach the branch and grow luxuriantly, 2 pairs of leaves are left at the base when picking the heart. During the growth period, the thin mature organic liquid fertilizer was applied once a month, and more topdressing was applied near flowering, and the mature liquid fertilizer containing mainly phosphorus and potassium was applied every 7 days until the flowers were in full bloom. The hundred-day grass is resistant to drought and should not be watered too much at ordinary times. Soil moisture in summer is the key to flowering. It is necessary to water the soil frequently to keep the soil moist and continue to grow and blossom after autumn. When the temperature is too high, it should be shaded properly. After each flower shedding, the residual flowers should be removed in time to reduce nutrient consumption and induce lateral branches to make them blossom again. After picking, it can be watered frequently, and the fertilizer mainly composed of phosphorus and potassium can be applied twice after one week, and the flowering period can be extended to November.

How to cultivate zinnia? How to cultivate zinnia? English name: Zinnia Scientific name: Zinnia elegans Origin: North and South America (with Mexico as the center) family genus: Compositae zinnia characteristic: annual herbs, like light, like temperature, prefer moisture, but also can withstand a certain drought, strong sex, cultivated soil requires loose, fertile. The soil is barren and too dry, which will directly affect the number, color and diameter of flowers. The 100-day grass pot cultivation used for large-scale commercial production generally uses seed culture, and occasionally producers use cutting culture in order to reduce production costs, but the quality can not meet certain requirements. The main varieties used in production are large flower double "dream", "short branch"; multi-flower single petal "first-class gold", "crystal", "star" and so on; medium flower single petal "abundant" series. Its optional colors are red, rose, pink, yellow, white, orange and so on. Although there are differences in height among varieties of zinnia, they are generally controlled between 20-30cm. It is not only suitable for use in flower beds and flower borders, but also an excellent material in art. Sowing and raising seedlings: about 125,300,300 and 1500 seeds per gram of large flower type, medium flower type and multi-flower type respectively. The largest amount is used in flower beds, flower decorations and flower mirrors during the National Day. The sowing time is generally controlled from June to July, and autumn sowing is also carried out, but due to the influence of temperature and other factors, it has a certain impact on flower color and plant shape, so autumn sowing is generally not used. The sowing medium adopts relatively loose artificial medium, such as bed sowing and disk sowing, and burrowing plate can also be used to raise seedlings under certain conditions. The pH value of the medium is 5.8mur6.2 and the EC value is 0.75.After disinfection, the sowing medium can be kept at 22 ℃, and the seedlings will emerge in 5 days. The first stage: 3 days after sowing, the radicle is on display, the degree of wetness of the medium should be relatively dry, too moist, easy to cause seed rot. However, it is very important to maintain moisture and sufficient oxygen around the seeds at this stage, so it is very beneficial to seed germination to cover with a thin layer of coarse vermiculite or loose ridge ash after sowing. Open seedlings must be covered with shade nets to ensure humidity and lower temperature (if sowing in the germination chamber, appropriate supplementary light can be given). No fertilizer is needed at this stage. The second stage: keep the soil relatively moist, neither too wet nor too dry, too wet can easily cause disease, too dry will lead to seedling wilting. At this time, the main root grows to 1-2cm, the cotyledons unfold, and the first pair of true leaves begin to grow, and the seedlings can gradually see light. Fertilization can be started, generally using 0.05% urea or 50ppm20-10-20 water-soluble fertilizer, N can promote vegetative growth. The third stage: when the seedlings enter the rapid growth period, the water management should be strengthened and the circulation process from dry to wet to dry should be carried out, which is beneficial to the root growth of seedlings and can also avoid overgrowth. At this stage, attention should be paid to pest control, 0.1% urea or compound fertilizer can be applied properly, and the proportion of N-P-K can be 15-15-15 (or according to the market supply, the content of N and K can be slightly higher. P content can be on the low side. If the conditions permit, the temperature of the medium and environment should be reduced to about 20 ℃, but it is difficult to control the temperature when sowing under the condition of bed sowing, and the full light environment is needed at this stage, otherwise it is easy to cause seedlings to grow. According to the growth trend of the seedling stage, the moisture should be controlled properly. Pay attention to the ventilation of the environment to prevent diseases. Spray chlorothalonil or methyl topiramate every other week or so. If overgrowth occurs at this stage, B9 should be sprayed immediately to control the height. The fourth stage: the root system has been formed intact, and when there are 4 pairs of true leaves, the overgrowth occurs. B9 should be sprayed immediately to control the height, and the temperature and humidity requirements are the same as the third stage. After the seedling refining stage, it is ready to be transplanted into the pot. Transplanting / potting: when there are 3 pairs of true leaves, they can be transplanted into the pot when there are 2 pairs of true leaves, and when there are 4 pairs of real leaves, they can also be planted directly on the pot. According to the requirements of plant height and plant diameter, the nutrition bowl of 12 × 13 is generally used, which can be put in place at one time, and there is no need to change the basin. The root system of hole-plate seedlings is less damaged and the transplant is easy to survive; for open seedlings, more mud should be carried out as much as possible, and the transplanting time should be carried out in the evening or cloudy days to improve the survival rate. Light regulation: zinnia is a positive plant, growth and flowering require sufficient sunlight, lack of sunlight is easy to produce stem node length, affecting the ornamental effect. There is no need for shade during the whole growing period after potting. Temperature control: zinnia likes temperature, but under the extremely hot summer conditions, the growth potential is slightly weaker, the flowering effect is not ideal, and the optimum temperature for growth and flowering is 15 Mel 20 ℃. The sowing date of zinnia is controlled in summer to prepare flowers for National Day. During the growth period, the high temperature above 35 ℃ generally will not affect the growth. Cultivation management: when there are too many Rain Water in the rainy season, it is easy to cause excessive elongation of internodes, so attention should be paid to eliminating stagnant water and spraying B9 at an appropriate time; long sunny and little rain in summer, too dry, easy to weaken the growth potential and affect the color of flowers, water and fertilizer management should be paid attention to at this time. During the whole growth period, proper water control and dry humidity between basin and soil are beneficial to root development and height control. Potted fertilizer is usually applied once every 10 days, depending on the growth, top dressing can be carried out, 0.2% urea and compound fertilizer can be used at intervals, and urea will be stopped after one month. According to the growth condition after flowering, the interval of topdressing application of compound fertilizer can be prolonged appropriately. Because the lateral branches of zinnia have the habit of terminal bud flowering, if the natural growth is not controlled, the flowering site will be higher and higher, affecting the beautiful plant shape, timely coring before and after transplanting and controlling the plant shape. In general, 3 pairs of true leaves are retained in 2 Mel. Hundred-day grass can be pruned, but it grows poorly after pruning, so this method is generally not used. Diseases and insect pests: the main diseases of zinnia are: seedling stage quenching disease, growing period bacterial wilt disease, stem rot disease, leaf spot disease; insect pests are: night moth, red spider, cabbage worm and so on. Out-of-nursery quality: 13cm nutrition bowl is used in production, which can come out of the nursery before the first flower is in full bloom, and the crown width should be between 20-25cm, with full plant shape, neat and consistent flowering. How to cultivate zinnia is not easy to die.

Zinnia, also known as Bubugao, zinzhihua, opposite leaf branches, is a plant of the genus Compositae. Annual herbaceous flowers. From June to October, there are many varieties of horticulture, and the color and shape of flowers vary from variety to variety. Originated in Mexico, like warm environment and sufficient light, slightly resistant to shade. The suitable temperature for growth is 20-30 degrees.

1. Layout

The hundred-day grass has many and gorgeous flowers, and after each flower blossoms, it will send out high branches and blossom, so it is called Bubugao. Potted plants should choose medium and short stem varieties, which can be arranged on the flower rack with light when flowering, and dwarf varieties can be placed on the coffee table. Lack of light will affect the persistence of flowering, so it should be arranged in places with light.

2. Management of the four seasons

(1) Spring is suitable to be arranged on the balcony facing east, south and west. The hundred-day grass prefers moist soil, but it can endure drying earlier. The zinnia prefers to be fat and tolerant to barren. The hundred-day grass was sown in late April. It is best to use fertile, deep, well-drained soil. When the sowing seedling has 3 or 4 leaves, it can be transplanted into the pot. The soil should be kept moist during sowing time and at the initial stage of transplanting. At the initial stage of planting, it should be topped for 1 or 2 times to dwarf and produce multiple lateral branches to form a full basin. During the growing period, we should maintain sufficient light, keep the basin soil moist, and apply light fertilizer frequently. Starting to bloom in June, it should be arranged in a place with sufficient light, keep the pot soil moist, and fertilize properly to facilitate the growth and opening of the next round of flowers. A single flower should be cut off in time after failure, so as not to affect its beauty. cutting off the remnant flowers can also promote the germination, growth and flowering of its lower branches. If you want to keep the seed, you can cut it off when the flowers are dry.

(2) it is suitable to be arranged on the balcony facing east, south and west in summer. The zinnia is not tolerant to high temperature, which slows its growth, reduces its flowering, and does not bear seeds. After the temperature rises, it can be moved to a place with bright light or bright light in the morning and evening to cultivate and watch, keep the basin soil moist and stop fertilizing. After the temperature dropped in the middle and last ten days of August, the zinnia can gradually return to normal growth and flowering. It should be moved to culture under light.

(3) it is suitable to be arranged on the balcony facing east, south and west in autumn. Autumn is also the peak season for the growth and flowering of zinnia, so the potted soil should be kept moist and fertilized properly to ensure adequate light. The hundred-day grass is not cold-resistant, and it is easy to die after the temperature drops at the end of autumn. if it is arranged on a closed balcony with light, it can prolong the flowering period and viewing period. With the decrease of the temperature, the zinnia gradually withered.

(4) withered and dead in winter.