How to Prune hot water plant 'Paul Arnold'?
No pruning required

hot water plant 'Paul Arnold' · Achimenes 'Paul Arnold'
Under glass, grow in either multi-purpose compost or John Innes No.2 loam-based compost in bright, filtered light. Bring rhizomes into growth at 16-18°C in spring. Water sparingly at first but freely as plants come into active growth. In autumn, remove the dead top growth and store the rhizomes at 10°C in dry conditions until spring
No pruning required