Sowing and maintenance management of daisies

Daisies are very different from other varieties of chrysanthemums in appearance, and there are many legends about daisies, so they are very popular. Generally speaking, in the north of our country, daisies can be sown from August to September, while in the south and other areas, they can be sown in late July. So what problems do daisies need to pay attention to from sowing to later maintenance?

Daisy

From the sowing stage of daisies, special attention should be paid to the control of light, even in summer. When sowing daisies, there is no need to cover the soil, but the light should not be too strong, and a thin layer of vermiculite can be covered with vermiculite; the germination temperature should be kept at 18 ℃; the humidity of the substrate should be kept between 80% and 90%, and the relative humidity of the air should be 100%; the pH value should be between 5.5 and 6.2, during which no fertilization is needed. In July and August, the greenhouse environment is mostly in a state of high temperature and humidity, so it is necessary to use shade nets, fans, wet curtains and other facilities to ventilate and cool down.

After the plant grows true leaves, the air humidity should be reduced to prevent the substrate from getting too wet, and the substrate should be allowed to dry out during the watering interval. Seedling refinement can be carried out when the seedling has 2 to 3 pairs of true leaves and the root system is developed.

In the seedling refining stage, water control is very important, otherwise it is easy to grow seedlings. Bao Qingsong said that in order to avoid overgrowth, we must first ensure adequate light, under the premise of not more than 50,000 lux, the stronger the better, to ensure that it is not less than 10,000 lux. At the same time, it is necessary to strengthen ventilation, control temperature and humidity, and use growth regulators to inhibit overgrowth.

After the seedling refining stage, the seedlings can be transferred to the pot. Most of the pots use 12 cm diameter nutrition bowls or flowerpots, with loose matrix, good drainage and air permeability, iron chelates and micronutrient elements, clay content between 15% and 30%, pH value from 5.5 to 6.2, EC value from 0.5 to 0.75. After the daisy is on the pot, the light should be more sufficient, ensuring at least 50 to 100000 lux in winter. In the process of producing finished flowers, topdressing can be done once a week.

Daisies are easy to infect germs, so close planting should be avoided and the environment should be ventilated. When diseases occur, 8 to 1000 times chlorothalonil and 1000 to 1500 times carbaryl can be used for control; when aphids and other pests occur, infected plants or leaves should be removed in time.

Introduction and maintenance of daisies

Daisy flower is also known as spring chrysanthemum, Malan head flower, longevity chrysanthemum, daisy of Compositae.

Morphological features: perennial root herbs, often cultivated in 2012. The height of the plant is 10cm to 20cm. Leaves basally clustered, spatulate or Obovate, margin rugose. The flower stem is drawn from the center of the foliage, and the head is solitary at the top of the stem; ligulate flowers in one or more whorls, white, pink, red or purple; tubular flowers yellow. Achenes, seeds fine, flattened, grayish white. The florescence is from March to June.

Growth habits and management points: like cold climate, avoid hot, bad flowering in hot conditions, easy to die. More hardy, the surface temperature is not lower than 4 degrees can overwinter in the open field. The soil is not strict, and it grows well on the rich, humus-rich, moist and well-drained sandy loam, and is not resistant to water and moisture.

Method of reproduction: commonly used sowing and reproduction. Most of the seeds are sown from August to September in the south, more in the north than in spring, and can also be sown in autumn. The optimum temperature for seed germination is 22-28 degrees, and seedlings emerge at 7-10 days after sowing, and can be transplanted when 2-3 true leaves grow. Attention should be paid to promoting lateral roots when transplanting to prevent overgrowth. Some fine varieties can also be propagated by ramets. Ramet is carried out in autumn, a pot of plants are divided into several clusters, and then directly on the pot for maintenance; some overwintering roots can also be used to split before sprouting in spring.

Family viewing: daisies have neat flowers and bright colors, which can be used as potted plants to beautify the courtyard balcony.

Key points of conservation of daisies in different growth stages

Daisies are perennial herbs in Compositae. With different sowing time, daisies can blossom in spring or summer, and are regarded as the national flower by Italians. So how should daisies be maintained at different growth stages?

Daisy

Stage 1: point tray seedling raising stage 1

The stage of radicle germination begins from the radicle piercing the seed coat, the young root touches the soil, and the cotyledons grow. The temperature should be kept at 18 ℃. Seed germination has good light property, so there is no need to cover the soil when sowing, but it is necessary to keep the cultivation medium moist and do not dry the medium at this stage. At this stage, the pH value is kept at 5. 5 to 6. Between 2, the relative humidity is 100%. Avoid direct sunlight and shade the seeds after sowing.

Stage 2: cotyledon emergence and growth stage

The second stage is from cotyledons to true leaves. The temperature remains at 18 ℃. Properly reduce the humidity of the cultivation medium, but still not too dry, the humidity is about 70% to 80%, can make the root system into the medium to absorb nutrients for the extension of cotyledons. The first and second stages will take 14 to 21 days.

Stage 3: true leaf growth and development stage

From the beginning of the growth of true leaves, 80% of the seedlings can be sold for the third stage. The temperature dropped to about 15 ℃. The air humidity also needs to be gradually reduced, and the substrate can have a dry-through process between the two watering, thus forming a dry-wet cycle, which is conducive to promoting root development.

Stage 4: seedling refining stage

At this stage, the root system has been formed intact, the seedlings can basically be sold, and become hardy by refining seedlings, this stage lasts about 7 days. The temperature, humidity and fertilization concentration are basically the same as those in the third stage. Attention should be paid to transplanting into the pot in time. The third and fourth stages will take 7 to 14 days.