Can lavender be planted in Tongwei County, Dingxi City, Gansu Province?

Lavender can't be planted in Tongwei County, Dingxi City, Gansu Province, because of less rain and low temperature, which is not suitable for planting.

Analysis and explanation:

Tongwei County has a temperate semi-humid and semi-arid monsoon climate, with an average annual temperature of 6.6℃, the lowest temperature in winter is generally around -20℃, and the highest temperature in summer is generally around 30℃, with a large annual temperature difference.

Frost-free period 147 days, frost-free period 120 ~ 170 days, annual precipitation is about 380mm, sunshine hours are 2 100 ~ 2430 hours, and annual evaporation is above 1500mm.

During the growth and development of lavender in the second year, the average temperature is about 8℃, and it takes 10~ 15d to start germination.

The average temperature is 12~ 15℃, and it takes 20 days for plant branches to turn green and elongate.

The average temperature is 16~ 18℃, and it takes 25 ~ 30 days to start budding.

The average temperature is 20~22℃, and flowers begin to bloom.

The average temperature is 26~32℃, which is the fruiting period.

Lavender is a plant that likes to be dry and needs little water, with an annual rainfall of 600 ~ 800 mm

Therefore, this area is not suitable for farming, with low temperature and insufficient precipitation all year round.

Breeding method:

First, sexual reproduction

Seeding and seedling raising, rapid propagation, developed roots, Miao Zhuang, is a good material for seed selection.

The seeds should be uniform in size, full and brown in luster.

Before sowing, the seeds should be dried, soaked in warm water at 30℃ 12~24h, soaked in concentrated sulfuric acid for 5min, washed with water, dried and then sown.

It can be sown and propagated in April. The lowest temperature of seed germination is 8 ~ 65438 02℃, and the optimum temperature is 20 ~ 25℃. It can be planted in May, but the seeds of lavender have great reproductive variation and high seed price.

Second, asexual reproduction

Lavender is propagated mainly by cutting, which can maintain the excellent quality of the female parent.

Cutting has strong adaptability and can be carried out in spring and autumn.

Generally, healthy plant terminal buds (about 5 ~ 10 cm) or lignified shoots are selected for cutting. When cutting, remove the leaves from the bottom two nodes, and then soak them with rooting agent 100 times. After treatment, they will take root in the soil for about 2 ~ 3 weeks.

The cutting substrate can be evenly mixed with river sand and oval chaff according to the ratio of 2∶ 1, and put into a 5× 10 plug for cutting.

After planting seedlings, put them in a ventilated and cool environment, keep the soil moist for the first three days, and then ensure that the branches are not wrinkled and dry according to the weather conditions to improve the survival rate.

Cutting seedlings are easy to manage and do not need fertilization during the whole seedling stage, so they are widely used in production.