The Pelargonium soil can be mixed with 4 parts humus soil, 3 parts garden soil (or peat soil), 2 parts river sand (or perlite) and 1 part organic fertilizer. It can also be mixed with fine sand soil, humus soil, perlite and organic fertilizer. Geranium requires the soil to be loose and air permeable. It can be turned over in autumn or loosened in time.
During the growth period of geranium, liquid fertilizer is applied every 10-15 days, while in spring and autumn, liquid fertilizer is applied every 7-10 days; before budding, nitrogen fertilizer is the main fertilizer, after budding, phosphorus and potassium fertilizer is the main fertilizer, and the concentration is 0.1% - 0.2%. In winter, it is put in the room for maintenance. The temperature is high, and it will not stop growing basically. It can be properly fertilized. In summer, the plant is in a semi dormant state, so fertilization should be stopped. It's better to apply fertilizer in the evening and water the next morning.
The geranium should be watered properly, rather dry than wet. In the spring and autumn growth season, sufficient water shall be provided to keep the basin soil moist, but no water shall be accumulated; in cloudy or rainy days, no water or fertilizer shall be applied generally. It can make the plants receive rain water properly, but avoid excessive rain water. Otherwise, it is easy to cause root rot.
In winter, according to the indoor temperature, try to use the temperature to irrigate, so as to avoid the low water temperature, leading to the yellowing of plant stems and leaves. (for detailed watering techniques, see ahref = "http://www.huaaike.com/yhjq/1448. HTML" target = "﹐ blank" > how to water Geranium ) )
Geranium likes to be warm, avoid high temperature and cold. The suitable growth temperature of geranium is 15-25 ℃, the indoor temperature should be kept at 10 ℃ in winter, and it is easy to suffer from cold damage below 3 ℃, but some varieties can withstand 0 ℃. In summer, when the temperature is over 35 ℃, it enters into a semi dormancy state. Keep ventilation as far as possible to avoid sultry environment, which is not conducive to sleep.
Geraniums are not afraid of strong light, but they need shade at noon in summer. Under the sun, Geranium grows healthily, leaves are thick green, internode is short, plant shape is beautiful. When breeding in the family, it should be placed in the place with direct sunlight in autumn, winter and spring. When flowering, it can be moved to the room to enjoy the maintenance and receive the light properly, but it is necessary to avoid direct sunlight, so as not to cause the petals to scorch.
There are different varieties of geranium, and the height of plant type is also different. Small plants should be selected for family planting. In addition, the regulation of growth agents is also needed. When the plant grows to 12cm or 15cm, spray chlorpromazine once a week, twice in a row. It can control the height of Geranium effectively and provide high quality potted flowers.
The geranium should be watered with special attention. It is said that it will cause plant death. High temperature and humidity will cause root rot. Of course, the flowering time can also be controlled. The flowering period is generally from April to June, but the temperature can be raised properly in winter, and the flowering can be continued from September to June of the next year.
