Hypericum cultivation methods and precautions

1. Maintenance methods

1. Temperature: When caring for it, the temperature of the maintenance environment is very important, because it is not cold-resistant or heat-resistant. The maintenance temperature should be kept at around 25 degrees. If the temperature is higher than 32 degrees, the plant will stop growing; if the temperature is lower than minus one degree, the plant will be frostbitten.

2. Watering: Observe the condition of the soil every time you water. Watering is only needed when the soil is completely dry. Each time you water, the soil must be completely watered, and water accumulation in the soil must be avoided.

3. Fertilization: After entering the growth period, it has a particularly high demand for nutrients. The nutrients in the soil alone are not enough, and artificial topdressing is required. The interval between top dressing is twenty days. It should be noted that the fertilizer needs to be diluted each time it is applied, otherwise the plants will be burned due to excessive concentration.

4. Light: Except for summer, the light in other seasons is not very strong. Normal light can be obtained every day, and the light time can be guaranteed to be five hours. The light in summer is relatively strong and requires appropriate shade. When exposed to light in summer, diffuse light should be used as the main source, and the light time is also about five hours.

2. Breeding techniques

1. Reproduction: It can be propagated by sowing. The sowing time is in March and April every year. Because its seeds are very small, it needs to be covered with soil after sowing, and then covered with grass to keep it moist. Generally, seedlings will emerge in about 20 days. It needs to be divided once in the first year and will bloom in the second year.

2. Pruning: It needs to be pruned once before sprouting in spring every year in order to promote the growth of new shoots and increase resistance.

3. Problem Diagnosis

1. Pests: The fall armyworm is a pest that mainly harms the leaves of Hypericum. It will feed on the tender leaves, which will affect the ornamental value of the plant. The disease usually occurs between July and September each year. At this time, you can use a 2.5% dichlorvos powder solution to spray it for treatment.

2. Disease: Brown spot disease is a fungal disease that it is more susceptible to. When the disease occurs, many small brown spots will appear on the branches and leaves of the plant. As time goes by, the spots will gradually spread and finally die. After the disease is discovered, the diseased leaves should be removed and destroyed first, and then 50% of cypermethrin solvent should be sprayed once every three days, and three times is a course of treatment.