A flowering elatior begonia moves from nursery conditions into a room that may differ in light, warmth and moisture. Start by making its growing arrangement visible and manageable.
Remove packaging that hides drainage, check the root ball and choose a suitable position. Avoid immediately repotting, heavily feeding and reshaping a sound flowering plant simply because it is new.
Watch the buds and the leaves
Record whether buds are opening, fading normally or dropping while the foliage also deteriorates. Check for pests and damaged tissue rather than treating every lost bud as the same problem.
Monitor compost moisture as the plant settles in. A fixed shop watering routine may not match the drying rate in your room, especially beside heating or a window.
If an adjustment is needed, make it for a clear reason and note it. Existing damaged flowers will not become fresh flowers again. Look at the progress of remaining buds and subsequent growth. Keep the label so further advice matches the begonia supplied, rather than a broad routine intended for a different type grown outdoors.
The RHS indoor-begonia guide notes that bud drop can accompany dry air or insufficient watering, while other symptoms have different possible causes. Read buds, leaves and medium together before choosing a correction.
Related reading: Elatior Begonia Care: Light, Watering and Feeding.