Begonia Asteris, also known as: Begonia bicolor, originated in Brazil, South America, has been introduced in China. Begonia is a shrub with thin stem, oval lanceolate leaves and silvery white spots. The flowers are white and green.
Small shrubs, many branched. The stem is relatively thin, 60-100 cm high, the new branch is green, the old branch is purple brown, and the branch tip is drooping. The leaves are oval lanceolate, bright green and glossy, with numerous silver white spots. The flowers are white and green.
B. president Carnot: the stem of the whole plant is smooth, and the stem node is similar to the bamboo node. Leaves alternate, oblong and oblique, green on the surface, with many small spots, dark red on the back and petiole.
Begonia is a temperate species, like scattered light and humid environment, cold resistance is not strong. The soil should be loose and well drained.
The culture soil should be mixed with saprophytic soil, peat soil and garden soil, and the plants should be kept in the shade or bright light. The leaves are tender and easy to fester, so we should pay attention to shade after summer, and try to avoid direct sunlight causing burning on the leaf edge.
Water frequently during the growing season to keep the basin soil moist. When the room temperature is below 15 C in winter, we must strictly control watering or spray instead of watering. The suitable temperature for growth is 18-21 ℃, which is easy to cause scorched leaves. In high temperature season, pay attention to the surrounding air humidity, spray 2-3 times a day. During the growth period, the compound fertilizer rich in P and K can be applied once a month, or the thin liquid fertilizer can be applied once every two weeks.
The winter temperature should not be lower than 8 ℃. During the winter, if the management is not good, such as low room temperature, poor light, the plant is in a semi dormancy state, watering or fertilization is too much, easy to rot roots and leaves. Generally, in winter, the plant should be placed in the sunlight in the shed in the morning and evening, stop fertilization and control water, and wash the leaf once a week with water close to the room temperature. At ordinary times, appropriate pruning should be carried out to maintain a beautiful plant posture and good ventilation.
