Boliviensis begonias arching into a long cascade of flowers
Boliviensis begonia tubers
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Boliviensis begonia tubers
Boliviensis begonias have movement built into their habit. Long, arching stems carry narrow, pendulous flowers above pointed, wing-shaped green leaves, gradually spreading outwards before falling over the sides of pots and baskets. The species originates from South America, where it grows in rocky, elevated habitats, and that naturally cascading form remains one of the clearest differences between Begonia boliviensis and more upright tuberous begonias.
Give the stems somewhere to travel. Hanging baskets, tall containers and raised pots allow Begonia boliviensis tubers to develop without the growth becoming crowded against the ground. Flowers can continue from early summer towards the first frosts, ranging across yellow, orange and stronger red tones depending on the variety. Keep plants sheltered, evenly watered and in moist but freely draining compost.
Rather than filling a basket with many competing plants, Boliviensis begonias can provide both the foliage and the trailing flower themselves. Several stems gradually build a layered cascade while individual flowers remain light enough for the plant to retain its open character. They are tender in the UK, so protect the tubers from frost once autumn brings the display to an end.
