2. Watering: Lavender doesn't like to keep water in its roots. After the first watering, water should be supplied when the soil is dry. The surface medium was dry and the inside was moist, and the leaves wilted slightly. Water in the morning, avoid the sun, and don't splash water on leaves and flowers, otherwise it will rot and breed pests and diseases. Continuous humid environment will make the roots grow poorly, there is not enough air to breathe, and even the whole plant will die suddenly. This is often the reason for the failure of lavender cultivation.
3. Illumination: Lavender is an all-day plant, which needs sufficient sunshine and a suitable humid environment. The environment that can give full sunshine is better, and it can grow in half sunshine, but there are few flowers. In summer, at least 50% sunlight should be blocked, ventilation should be increased, and the ambient temperature should be lowered, so that although the growth is weak, it will not die. Lavender can grow well on the flat ground in winter, so it should be cultivated in sunny places.
4. Temperature: Lavender is semi-heat-resistant, so it is cool. It likes warm in winter and cool in summer. The suitable growth temperature is 15 ~ 25℃, and it can grow at 5 ~ 30℃. Limit temperature: above 35℃, above 38 ~ 40℃ for a long time, and the top stems and leaves turn yellow. In northern winter, when the temperature is lower than 0℃ for a long time, the seedlings begin to hibernate, during which the seedlings can tolerate the low temperature of -20 ~-25℃.
5. Fertilization: When fertilizing, you can put bone meal as the base fertilizer (once every three months) in the pot soil, and then apply a fertilizer with higher phosphorus fertilizer, such as Huabao No.3 (20-30-20). Apply light fertilizer.
6. Pruning: Lavender flower essential oil is the most abundant, and it is mainly used in flowers or inflorescences. In order to facilitate harvesting, some small inflorescences in the early stage of cultivation may wish to be leveled with scissors, and the newly grown inflorescences are of the same height, which is conducive to one-time harvesting. Some varieties can be as high as 90 cm, and this method is also used to make plants low, promote more branches and flowers, and increase harvest. Pruning must be carried out after flowering, and the plant can be pruned to 2/3 of its original size, so that the plant type will be stronger and conducive to growth. Pruning should be carried out in cold seasons such as spring and autumn, generally in spring, and pruning in autumn will affect cold tolerance. When pruning, be careful not to cut off the lignified part, lest the plant weaken and die.