Lagerstroemia indica is generally sown in March-April, sown in the open field, and evenly spread the seeds into the well-leveled seedbed. Sprinkle about 2-3 grains every 3-4 cm.

After sowing the seeds of Lagerstroemia indica, cover them with fine soil about 2 cm thick. After about 10-14 days, most of the seeds germinate and unearth. After unearthed, ensure the moisture of the soil. After the seedlings grow 2 pairs of true leaves, in order to ensure that the seedlings have enough For the growth space and nutrient area, you can choose to thin the nursery after the rain, so that the air between the seedlings can be circulated and the sunshine is sufficient. During the growth period, management should be strengthened, and thin fertilizer should be applied 2-3 times from June to July. In summer, drought should be prevented, water should be frequent, and the nursery should be kept moist, but remember not to overdo it. The height of seedlings in winter can reach 50-70 cm. Lagerstroemia indica in good growth can bloom the same year. Trim lateral branches and flowering branches in time after the leaves fall in winter. Transplant in early spring the following year.
In order to make the seeds of Lagerstroemia indica germinate neatly and the germination time is fast, the seeds should be primed before sowing. First, the seeds should be disinfected. The common method is to soak them with 0.2% potassium permanganate for 1-2 days, and then rinse them with water several times to remove the residual potassium permanganate. After rinsing, soak the seeds in warm water with a temperature of about 45-50°C for 2-3 days. After soaking, remove the seeds and dry them slightly.