How to promote the growth of Rieger Begonia

Methods for promoting seedlings of Rieger Begonia

Long-day treatment

Long-day treatment is essential during the growth period of Rieger Begonia seedlings. In the winter when the sunlight is not very sufficient, you can choose to use simulated light to supplement the light source. The lighting time should not be too short each time, at least 16 to 20 hours per cycle.

Dark Processing

In addition to long-day light treatment, dark treatment is also necessary. When the branches grow to 5 to 7 cm long, start dark treatment. The dark treatment time can be from 5 pm to 8 am the next day. Generally speaking, dark treatment should not be generalized, but should be provided for a period of one week to half a month depending on weather, cultivation and variety conditions.

In addition, you can use a black plastic bag to achieve dark processing, as long as it is a light-proof film or curtain. The temperature can easily rise during the treatment process, so if the temperature rises, start the dark treatment later and extend the treatment time in the morning.

Climate conditions

In addition to light, another important factor is temperature. The temperature must be maintained at 20°C to 21°C during the initial growth phase. After about one to one and a half months, the temperature can be reduced to about 18℃ to 19℃, while keeping the indoor air unobstructed. In the final stage of cultivation, the temperature can be lowered to between 17°C and 18°C. In fact, it is not always good to keep the temperature high. Lower temperatures will produce brighter colors. However, lowering the temperature in pursuit of growing more colorful flowers will cause gray mold spots to appear on the flowers.

Carbon dioxide administration

Increasing the amount of carbon dioxide is also an excellent option. Because CO2 produces stronger leaves and darker leaf color. Use to increase carbon dioxide levels should be from about eight o'clock after sunrise to about five o'clock. If you use a simulated light to fill in the light, it is recommended to apply carbon dioxide during the fill in light period, which will have a better effect.