Ririshun, also known as Catharanthus roseus, has a cymose inflorescence, a red corolla, a cylinder-shaped corolla and rich colors, which is loved by many friends. But my friends should pay attention to the fact that ririshun belongs to Catharanthus of oleander family. The white milk from the broken stems and leaves is highly toxic and must not be eaten by mistake! So what's the planting method of diurnal spring? Let's read on~
How to plant diurnal spring how to plant diurnal spring: 1
The seeds of Catharanthus roseus ranged from 700 to 750 per gram. Catharanthus roseus is a perennial herb, which can blossom all year round under suitable conditions. However, in the Yangtze River Basin, because of the cold climate, it is often cultivated annually, and the sowing time is mainly from January to April. Loose artificial medium should be used for sowing, bed sowing and box sowing can be used for seedling raising, and plug seedling can be used if conditions permit. The pH value of medium is 5.8 ~ 6.2, EC value is 0.5 ~ 0.75. After disinfection, the temperature of medium is about 22 ~ 25 ℃.
2. Transplantation / upper basin
If the seedlings are raised with plug, they should be transplanted when they grow to 2 ~ 3 pairs of true leaves. Use the nutrition bowl with the diameter of 12 cm to put the bowl in place at one time, and do not change the bowl again. If the seedling is sown with open seedling tray, it is best to transplant the seedlings with 72 or 128 plug tray once when 1-2 pairs of true leaves are planted, and then transplant them into the pot.
3. Light conditioning
Catharanthus roseus is a positive plant. It needs sufficient sunshine for its growth and flowering. Sufficient light is also conducive to preventing the plant from overgrowth. In winter, the lack of sunshine and lower temperature are not conducive to growth.
4. Temperature control
Catharanthus roseus is sensitive to low temperature, so temperature control is very important. In the Yangtze River Valley, it must be cultivated in protected field in winter. When the temperature is lower than 15 ℃, it will stop growing. When the temperature is lower than 5 ℃, it will be damaged by freezing. As Catharanthus roseus is more resistant to high temperature, it is often used in summer and national day in the Yangtze River Basin and South China.
How to plant spring
5. Water and fertilizer management
Catharanthus roseus should not be wet and waterlogged, and the basin soil should not be watered too much. In particular, the indoor winter plants should be strictly controlled watering, drying is better, otherwise it is easy to be frozen. Open field cultivation, summer shower, pay attention to timely drainage, so as to avoid waterlogging caused by the whole death. Water soluble fertilizers of 20 – 10 – 20 and 14 – 0 – 14 should be applied alternately once every 7-10 days at the concentration of 200-250 ppm. When the temperature is low in winter, the amount of 20 – 10 – 20 fertilizer should be reduced. If ordinary soil is used as medium, compound fertilizer can be used as base fertilizer before the medium is put into pot. When the fertility is insufficient, the water-soluble fertilizer should be applied.
6. Cultivation management
Catharanthus roseus can not be pinched, but in order to get a good plant type, it needs to be pinched once or twice. For the first time, there are 3-4 pairs of true leaves; for the second time, there are 1-2 pairs of true leaves on new branches. Catharanthus roseus is a perennial herb, so if the finished product can't be sold, it can be pruned again. When customers need it, it can cultivate the ideal height and plant type. In the process of cultivation, regulators can be used, but Paclobutrazol cannot be used.
7. Diseases and insect pests
Catharanthus roseus plant itself is poisonous, so it is more resistant to diseases and insects. The main diseases in seedling stage are: Seedling Damping off disease, gray mold, etc. in addition, the occurrence of fertilizer damage and drug damage in seedling stage should be prevented. If it happens, it should be poured through with clean water immediately, and ventilation should be strengthened to reduce the harm. The main pests are: red spider, aphid, tea moth, etc. A long period of rain is very bad for Catharanthus roseus, especially susceptible to disease. No rain during production. Expand knowledge - the flower language of spring and day: happy memories.