1. Soil: suitable for slightly alkaline or neutral sandy soil. Special attention must be paid to the selection of well-drained media, you can use 1/3 of the perlite, 1/3 of the vermiculite, 1/3 of the peat moss mixed with the use. In case of open field cultivation, attention should be paid to the drainage of the soil, and the soil can be piled up to form a border before planting.
2. Watering: Lavender doesn't like to have water stagnating in its roots all the time. After a thorough watering, you should wait until the soil is dry and then give water to the surface of the culture medium is dry, the degree of internal wetness, the leaves slightly wilted mainly. Watering should be done in the morning, out of the sun, and water should not be splashed on the leaves and flowers, as it is prone to rot and breeds pests and diseases. Continuously humid environment will make the roots do not have enough air to breathe and poor growth, or even sudden death of the whole plant, cultivation of lavender failure is often the reason for this.
3. Light: Lavender is a full-sun plant, need sufficient sunlight and humid environment, can give full sunlight environment is better, half-sunlight can also grow, but the flowering is more sparse. In summer, at least 50% of the sunlight should be removed and ventilation should be increased to lower the ambient temperature, so that the plant will not die although its growth is weak. Winter lavender in the flat ground can grow well, should be cultivated in full sun.
4. Temperature: Lavender is semi-heat-tolerant, good cool, like warm in winter and cool in summer, growth temperature: 15 ~ 25 ℃, in 5 ~ 30 ℃ can grow. Restriction of temperature: above 35 ℃, long-term higher than 38 ~ 40 ℃ top stems and leaves withered. Northern winter long below 0 ℃ that is the beginning of dormancy, dormant seedlings can withstand -20 ~ -25 ℃ low temperature.
5. Fertilization: Fertilizer can be placed in the potting soil bone meal as a base fertilizer (every three months with a), seedlings can be applied to the flower treasure two (20-20-20), into the plant and then applied to the higher phosphorus fertilizer fertilizers such as flower treasure three (20-30-20). Apply light fertilizer.
6. pruning: lavender flowers are the most rich in essential oils, the use of flowers or inflorescences-based, in order to facilitate harvesting, cultivation of some of the early small inflorescences may wish to large scissors throughout the leveling, the height of the new inflorescences are consistent, conducive to a harvest. Some varieties of height up to 90 centimeters, also use this method to make the plant low to promote more branching, flowering, increase the harvest. After flowering must be pruned, the plant can be pruned to the original 2 / 3, the plant will be stronger, and conducive to growth. Pruning should be done in cooler seasons such as spring and fall, usually in the spring, pruning in the fall will affect cold hardiness. When pruning, be careful not to cut into the lignified part, so as not to weaken the plant and die.