How to Prune Geranium thunbergii 'Jester's Jacket'?
Remove flowered stems and old leaves to encourage the production of fresh growth

Geranium thunbergii 'Jester's Jacket' · Geranium thunbergii 'Jester's Jacket'
Thrives in moderately fertile, moist but well-drained soil in dappled or afternoon shade, but will tolerate most soils and positions unless waterlogged
Remove flowered stems and old leaves to encourage the production of fresh growth