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Pot Sizes For standard sizes of African violets, 9 cm pots are often used. For large-crown varieties, 10--12 cm pots are recommended.
Potted plants are planted in order to facilitate handling and reduce plant damage. When planting, be careful not to press the potted soil too hard and keep it loose. According to the growth habits of African violets, the plants cannot be planted too deep or too shallow, but when they are too deep, the heart and leaves are buried, and when they are too shallow, they are easy to fall. The correct standard is that after the water is poured, the leaf is flush with the soil.
After 5 to 6 weeks of efflorescence into the growing period, the leaves of African violets begin to crowd together, which requires sparse pots. Usually only sparse pots. For a 9 cm pot, generally 40--45 pots are placed on a square meter. If the sparse pots are too early, the microclimate of the plants will not exist, causing the growth of the plants to slow down, the plants to be short, and even delaying the flowering period. If there is a sub-species, try sub-potting twice. For the first time, 55--60 pots are placed on 1 square meter, and when the leaves are squeezed together, the second sparse pot is made, and 1 square meter can be placed. Put 40--45 pots.
The temperature of the watering water is very important, and the water temperature cannot differ from the air temperature by 5°C, otherwise the yellow spots on the leaves are prone to occur. The seedlings should be watered immediately after planting. Watering before the first spatula can be watered from the top of the plant. Later, you should change this method, otherwise it will hurt the flower buds. After the seedlings have just been planted, they can't be used as fertilizer and can only be filled with clean water.
The temperature at which the temperature is growing is 20--21°C, and the temperature difference between day and night cannot be greater than 1°C and the ground temperature is maintained at 18°C.
Shade to adapt to the light range of 10000--12000 lux. How much shading should follow the following simple rule, that is, sunny weather, you will clearly see the shadow of your outstretched palm on the leaf. Perseverance should be observed because of excessive exposure even for a short while. It will also cause a disaster. Therefore, although indoor shade is present from the end of February to the beginning of March, the temperature and light in the greenhouse in summer have risen too fast.
Illumination can shorten the fertility period by 2 weeks through artificial light supplementation from October to March of next year. A fluorescent lamp with a light intensity of 2,750 lux is recommended for 14 hours a day. Fill light when natural light exceeds 2750 lux.
Carbon dioxide fertilization from sunrise to sunset, carbon dioxide concentration is maintained at (500--600)10 (the negative sixth power), in the case of sunny or artificial light, the carbon dioxide concentration should be maintained at (700--800)10 ( The negative 6th power), when the carbon dioxide concentration exceeds 100010 (the negative 6th power), the plant will suffer. Carbon dioxide fertilization cannot be performed at night.
African violet cultivation techniques
The matrix prepared with high-quality peat moss in the potted substrate is light in texture, water-permeable, and fertile, and is most suitable for the growth and development of African violets. The pH of the matrix is ​​5--6.