To keep the spectacular tuberous begonia flowering well into the autumn, feed weekly with a complete liquid plant food.
Quantity, size, and colour of blooms can be enhanced by adding extra phosphorous and potash.
Gently does it as these delicate plants burn easily.
Keep moderately moist but never wet. Provide good air circulation. Morning sun is the best position.
As the late summer sun wanes, attempt to give them a little more direct light. As older stems begin to fade, cut them back severely to just above a leaf node with a side shoot.
This shoot will usually develop into a new flowering stem. Strong, healthy stems cut just below a joint or with a tiny bit of basal tuber will often strike at this time of year.
Rub a bit of charcoal dust or fungicide into the wounds to stop any rot then plant into a sandy potting mix.
Place the pots in a partly shaded and sheltered spot. The baby tubers formed will flower next year.
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