Marigold likes a warm and humid environment with sufficient light. The suitable growth temperature is 20-30 ℃, the temperature in summer should not be higher than 30 ℃, and the winter temperature in winter should be above 5 ℃. To ensure that the growth of marigold has sufficient sunshine, can make the blooming gorgeous, the light is insufficient, the plant is easy to grow in vain, is not conducive to flowering.
The requirement of marigold on soil is not strict. The loose sandy soil with good air permeability and drainage is the best.
Marigold should be watered more frequently in the growing period, but the amount of water should not be too large each time. If you see it dry, you can see it wet. When watering, we should change the way of watering according to the change of seasons. We should water in the morning in summer and autumn, and at noon in winter and spring.
Marigold should be moderately fertilized, and a certain amount of base fertilizer should be applied during planting. Liquid fertilizer should be applied once a month during the growth period, and more nitrogen fertilizer should not be applied, so as to avoid excessive growth and no flowering.
Marigold is propagated by seeds, which can be sown and transplanted in spring. It can also be propagated by cutting in summer.
After transplanting, marigold can pick the heart, promote more branches, and blossom more.
After blooming, marigold should be cut off in time, and the dense branches and leaves can germinate new branches to promote more flowering. It can also promote the growth and rooting of marigold. When the aerial root grows stronger, cut the marigold from the stem and replant it. It can also be cut down again, but it is easy to affect plant growth, resulting in poor long branches, poor leaves and poor flowering.
There are fewer diseases and insect pests in marigold, and the common ones are spot blight, bacterial wilt, powdery mildew, aphid and leafminer moth. Drugs can be used for prevention and treatment.
