Back in spring 2021.  1 litre sized pot.  Potentilla fruticosa "Abbotswood" is a deciduous shrubby Potentilla with five-petaled white flowers from late spring.  It performs better in a sunny position but can tolerate some shade.  Likes well-drained, moist soil. 50-70 cm high.  Prune as required in late winter, early spring to maintain shape.