How to Prune golden pheasant-eye?
Shorten flowered shoots to vigorous sideshoots; remove about a third of stems at ground level annually. Prune immediately after flowering.

golden pheasant-eye · Leycesteria crocothyrsos
Also known as: yellow pheasantberry
Grows in any fertile soil but may suffer foliage damage and stem dieback in harsh winters in cold gardens so overwinter under cover or protect from cold, drying winds
Shorten flowered shoots to vigorous sideshoots; remove about a third of stems at ground level annually. Prune immediately after flowering.