The early growth of newly planted Lavender was slow. With the rise of spring temperature, lavender enters the rejuvenated period in mid April. In order to promote the development of branches and roots of lavender, it is necessary to carry out artificial pruning from the end of April to the first ten days of May, that is to say, the top branches above 15cm from the ground shall be pruned and flat stubble, and the middle part of the plant shall be heavily cut, and the fourth week shall be lightly cut.
In late May, the first flower of lavender entered the budding stage, and in late June, it entered the flowering stage. In the first year of planting, in order to promote the growth of lavender seedlings and reduce nutrition consumption, the first flower bud can be knocked out in the first ten days of June. The second crop of flowers entered the budding stage in the middle of August, and the blooming stage was in the middle of September. Under the condition of better climate in autumn, the third flowering season is in the middle of October.
For the newly planted lavender, sufficient irrigation should be ensured in the first three years to promote plant growth. In the middle and last ten days of April every year, the lavender should be watered in time. According to the weather conditions and soil moisture, the water should be watered 6-8 times a year. Attention should be paid to the well watered bud water and flowering water. It should be watered evenly and thoroughly to ensure the water quality. Combined with each irrigation and timely ploughing, to achieve the purpose of moisture conservation and moderate weeding, generally 5-7 times of weeding in the whole year. Winter water shall be irrigated in the first and middle of November.
Although lavender has a strong ability to endure barren and drought, it needs to provide relatively more water and fertilizer to promote the rapid growth and yield of lavender after planting. For newly planted lavender, fertilization should be done early within 3 years after planting. Regular fertilization. In combination with the first application of irrigation, the first flower bud stage, 15kg of urea and 10kg of diammonium phosphate were applied to the mu of irrigation, and 10kg of urea was applied to the mu of top dressing for the second time, which was applied in the artificial hole beside the plant.
The winter is long and the temperature is low. The field experiment proves that in order to ensure the lavender to live through the winter safely in this area, it is necessary to bury the soil artificially before the winter. That is to say, in the first ten days of November, after irrigation of overwintering water, the branches of lavender above 15-20cm from the ground shall be flat stubble pruned, and then surrounded by soil, with the buried soil thickness of about 15cm, so as to ensure that the base part of the tree will not suffer from frost damage. Pay attention that the buried soil should not be too thick or too thin. In the spring of the next year, before watering the green water, timely pick up the soil and release the seedlings, that is, remove the covering soil from the plants to prevent the branches and leaves from mildew in the soil.
The appropriate harvest time is the full flowering period, that is, when 70% of the floret of the flower ear is open, the harvest is too early or too late, which will affect the yield. The first flower is generally from late June to mid July, and the second flower is from late September to early October. Forecast the yield before harvest. When harvesting, do not bring weeds and too many stems and leaves to avoid affecting the quality of oil. After harvesting, you should choose 10:00 in sunny days. If the morning is wet or cloudy, you should not harvest. The stronger the light, the hotter the day, the higher the oil yield. During transportation and flower drying, it should not be piled up too thick to prevent heating and self steaming. It must be processed on the same day of harvest.
