How to prune tuberous begonia

Pinch in spring when plants are 3–4 inches tall; deadhead throughout summer; cut back in autumn before lifting tubers. Pinch growing tips early to encourage branching. Deadhead by snapping or cutting spent blooms at their base. In autumn, cut stems to a few inches before lifting and storing tubers in a frost-free place.

Deadhead weekly during bloom; pinch once in spring; seasonal cut-back each autumn. Tuberous Begonias benefit from deadheading to prolong flowering and pinching early in the season to encourage bushiness. Remove spent blooms (and the smaller female flowers flanking the showy male bloom if you want larger flowers). Cut plants back to the tuber at the end of the season before dormancy.

Pinch growing tips early to encourage branching. Deadhead by snapping or cutting spent blooms at their base. In autumn, cut stems to a few inches before lifting and storing tubers in a frost-free place.