Special attention should be paid to light control, even in summer.
When Daisy is sown, there is no need to cover the soil, but the light can't be too strong, so it needs to be properly shaded, and can be covered with vermiculite thin layer; the germination temperature needs to be kept at 18 ℃; the substrate humidity needs to be kept between 80% and 90%, and the relative humidity of air needs to be 100%; the pH value should be between 5.5 and 6.2, and fertilization is not required during the period.
In July and August, the greenhouse environment is mostly in a state of high temperature and humidity, which requires the use of shading nets, fans, wet curtains and other facilities for ventilation and cooling.
The air humidity should be reduced to prevent the substrate from being excessively wet, and the substrate should be allowed to dry thoroughly during the watering interval. When there are 2 to 3 pairs of true leaves and roots in the seedling, the seedling can be refined.
It is very important to control the water content, otherwise, the seedlings will grow in vain. In order to avoid excessive length, first of all, sufficient light should be ensured. On the premise of no more than 50000 lux, the stronger the better, and no less than 10000 lux. At the same time, ventilation should be strengthened, temperature and humidity should be controlled, and growth regulators should be used to restrain excessive growth.
The pot utensils are mostly 12 cm diameter nutrient pots or flowerpots. The substrate is required to be loose, with good drainage and air permeability, containing iron chelate and micronutrient elements. The clay content is required to be between 15% and 30%, the pH value is 5.5 to 6.2, and the EC value is 0.5 to 0.75. After the daisy is put into the pot, the light should be more sufficient, and at least 50000 to 100000 lux should be guaranteed in winter. In the production process of finished flower, topdressing once a week is enough.
Daisy is easy to infect germs, so it is necessary to avoid close planting and keep the environment ventilated. In case of aphids and other pests, the infected plants or diseased leaves shall be removed in time.
