Family: Begoniaceae
Common name: Tuberous begonia
Tuberous Begonias are hybrid species well-known for their thick rose-like flowers and lush foliage. Developed by crossbreeding several species of Begonias, this plant has now become a favorite among gardeners and plant enthusiasts for their vibrant flowers and ease of maintenance.
Plant characteristics
Tuberous Begonia can grow to a height of 50-60 cm with succulent and brittle stems that can break off easily. They are mostly upright, but when it starts blooming abundantly, the flowers droop down under the weight.
And hence these plants can be grown in pots or hanging baskets. When grown in hanging baskets, the flowers cascade down the sides in a very elegant manner.
The roots system is formed of tubers that are thick storage organs to save moisture and nutrients for the Begonia to tide over adverse weather conditions.
Leaves are very similar to those of normal Begonias – broad and fleshy, about 10-15 cm long. Begonia leaves exhibit a wide range of shapes and this is a key attraction for plant collectors.
There are elongated, rounded, heart-shaped leaves that come in a range of colors like green, bronze, greyish-green, maroon-green with prominent venation. Leaves can also be smooth or hairy depending on the species or cultivar.
Flowers of Begonia are very beautiful, more so for the Tuberous begonia. They range in colors from pink, red, yellow, white, orange, and even variegated flowers with darker color along the edges of the petals. Flower are single petaled, double petaled or ruffled, each flower about 4-8 cm in diameter.
Flowers are formed in large bunches covering the plant during flowering season, which extends from late spring to late fall. Tuberous Begonias can cover your garden in the riot of colors for a long time, attracting pollinating insects. Though the plants are capable of producing small fruits, they are not commonly seen in garden plants.
Gardening Tips
Tuberous Begonia plants need bright sunlight, but harsh direct sunlight can burn the edges of the flowers and leaves. The stems are succulent and therefore overwatering is a big risk that can lead to stem and root rot. Keep the soil moist, but not soggy.
Plant them in well-draining, nutrient-rich potting mix and fertilize every 2-3 weeks especially during the growing season. Begonia plants are generally pest-resistant and can grow well even in poor soil conditions. Pruning can help the plant stay bushy and compact.
Tuberous Begonia plants cannot be grown indoors since they need good sunlight. But they can be brought indoors during extreme weather conditions.
Uses of Tuberous Begonias
These plants are mostly grown as ornamental plants, but they were used to treat cuts and wounds in traditional herbal medicine. The flowers were eaten raw or used in salads and garnishes. Flowers are slightly tart, and the level of tartness varies depending on species.
But all parts of the plant contain oxalic acid which, when taken in large quantities can affect nutrient absorption in the body. So it is ok to ingest small quantities, but do not use them frequently.
Propagation
Propagation is through root tubers, seeds and stem cuttings. Root tubers of the parent plant can be divided gently and replanted, making sure that each tuber contains at least one bud.
Seed propagation is not very common since seeds are rare in garden plants. Propagation through stem cuttings is very effective since they root well in moist, well-drained soil.
Photographed at: Cromwell road, London
