How to Grow and Propagate Tuberous Begonias

Cultivation guide

The optimal night growing temperature for newly transplanted plants is 18°C to 20°C. Once transplanted, the night temperature can be lowered to 16°C to 18°C. To promote vigorous plant growth, nitrogen fertilizer can be applied at a concentration of 100 ppm to 150 ppm, once every 2 to 3 irrigations.

Choose moderate moisture, that is, when the color of the substrate changes from dark black to medium brown. Watering tuberous begonias during the day at low temperatures can prevent the plants from scorching. If the plants are placed in a dry environment, they will form smaller flowers.

Tuberous begonias are very sensitive to day length. Whether the plants have just been transplanted from plugs or were grown by the grower, it is essential to ensure sufficient sunlight, which is the key to promoting plant growth and high quality. In just a few days, the 'Go-Go' series will form a tuberous stem and a flower. On the premise of ensuring a daylight length of 12 to 14 hours, the plants have an intermittent night length, which can inhibit tuber formation and promote multiple flowering periods. If seedlings or plugs are grown under long-day conditions and then transplanted to short-day conditions, the plants will grow unevenly.

Treating plants with Cycocel can increase the number of sprouting flower buds, but does not promote early flowering. If needed, two weeks after transplanting, plants can be treated with 300 ppm of Cycocel. When planting the plants in pot containers, point the leaves neatly toward the edge of the container, and the edge of the container will be the flower side.