How to Prune plume poppy 'Spetchley Ruby'?
Cut down to the base in late autumn

plume poppy 'Spetchley Ruby' · Macleaya microcarpa 'Spetchley Ruby'
Best in a deep, moderately fertile soil that is moist but well-drained, but will tolerate most soils. It needs plenty of space and has the potential to become a nuisance on sandy soils. For the best foliage, provide shelter from cold winds; likes sun but tolerates partial shade
Cut down to the base in late autumn