1. Double-petalled Danish bellflower has low requirements for soil, and the soil can grow normally. In order to ensure the vigorous growth of double-petalled Danish bellflower, suitable soil should be provided to keep it loose, breathable and fertile, which can be mixed with garden soil, sandy soil and humus soil.

2. Double-petalled Danish bellflower can tolerate shade, but it can't grow without sunshine. Proper light can promote its growth. I didn't see strong light when I first served the pot, but I gradually increased the sunshine when I got used to it. Keep soft light during the spring and autumn growth period, and avoid direct light in summer.

3. Belonging to temperate plants, it has poor adaptability to temperature, neither high temperature nor cold tolerance. The suitable temperature is about 15-25 degrees Celsius, and maintaining a good temperature is beneficial to growth.

4. When breeding double-petalled Danish bellflower, we should pay attention to proper watering and regular watering to keep the soil moist so as to promote its normal growth. In general, water 1-3 times a week, and the number of watering times should be judged according to the season and the dryness and wetness of the soil.

5. Proper fertilization is helpful to the growth of double-petaled Danish wind chimes. Organic fertilizer should be applied regularly during the growing period, about once a month. Phosphorus and potassium fertilizer should be applied before flowering to promote vigorous flowering and ensure flowering quality.