Tuberous Begonias are excellent for planting inand boxes outdoors. Their large rose-like bloom in profusion from June until September.
The modern hybrids and varieties of Tuberouscome in a wide range of colours, with large single or double blooms.
Plants range in size from 30-60cm (12-24in), with a spread of 30-38cm (12— 15in), depending on the hybrid that is cultivated. Both female and male flowers are produced; the single female flowers are small and are usually obscured by the profusion of double male flowers 8— 15cm (3-6in) in diameter.
Choose from ‘Rosanna’ or ‘Rhapsody’ for pink flowers, ‘Midas’ for deep yellow and ‘Jamboree’ for orange and yellow flowers.
Tuberous Begonias are easy toby taking or dividing the tuber in the spring.
1 Takecuttings in April from new shoots. They should be 8-10cm (3-4in) long, with a healthy growing tip and at least 2 pairs of . Carefully trim the end of the below the last pair of .
2 Remove the lowest pair of leaves and dip the end of thein some . Insert in pots of equal parts peat and sharp sand.
3 Water well and cover the pot with a polythene bag in which you have made several small holes. Keep at 18°-21°C (65°-70°F) until theare well-established.
4 When the young plants are growing well, transfer to 8cm (3in) pots of growing medium.
1 Divide the tuber in spring when the first new shoots appear. Cut it into 2-3 sections, so that each section has at least one healthy shoot.
2 Plant each section in a pot of peat-based.
A white powdery deposit on the plant is, which is encouraged by humid conditions and dry .
Treatment: Spray or dus the plant with sulphur. Improve the growing conditions byregularly and generously in spring and summer and by providing adequate ventilation for indoor plants.
Weak growth is caused by, which suck the plant’s sap.
Treatment: Spray the plant with a solution of soapy water and repeat several times.
This plant needs some attention, particularly with overwintering and bringing into growth in the spring.
- : To bring tubers into growth in spring, plant in peat until new shoots appear, then pot on in a light, well-drained peat-based compost. In winter, store dried tubers under a layer of peat.
- Water generously during the summer. In winter, water stored tubers only very occasionally.
- Feeding: Feed every 14 days throughout the summer with a standard liquid fertilizer. Stop when the plant has finished flowering.
- Light: The plant must have good but filtered light. Grow in a of partial shade.
- Temperature: Overwinter tubers at 7°C (45°F) and bring into growth again in spring at 18°C (65°F). In summer, the plant will thrive at temperatures around 20°-23°C (68°— 74°F).
When to buy
- Tuberous Begonias are available as bedding plants in early summer from garden centres and nurseries. Alternatively, buy tubers in March.
- Choose plants with healthy foliage. Tubers should be plump and firm.
- Properly cared for and overwintered, Tuberous Begonias will live for many years.