Why Choose Begonia Tubers & Bulbs from Carbeth Plants
How to Choose and Grow Begonia Tubers in UK
Frequently Asked Questions
Begonias grown for summer displays are technically tubers, not true bulbs. They are sometimes referred to as begonia bulbs or begonia corms, but most popular garden varieties are tuberous begonias. These swollen underground structures store energy and produce new growth each season.
Begonia tubers usually take two to three weeks to sprout once planted in warm conditions. Flowering typically begins around 12 to 16 weeks after planting. Starting them indoors in early spring can encourage earlier blooms.
Begonia tubers can return each year if lifted and stored properly over winter. In the UK, they are not fully frost hardy, so the tubers should be dried and kept in a cool, frost free place. Replant them the following spring for another season of flowers.
Plant begonia tubers indoors from late February to April to give them a head start. Move them outside once the risk of frost has passed, usually from late May. This timing helps ensure strong summer flowering.
Plant begonia tubers just below the compost surface with the hollow side facing up. Cover lightly with compost and avoid overwatering before shoots appear. Once growth is visible, increase watering gradually.
For a full 30cm basket, three to five begonia tubers usually create a balanced display. Trailing varieties such as pendula types will spill over the edges beautifully. Spacing them evenly allows each plant to develop fully.