How to Prune Himalayan blue poppy 'Mop-head'?
Cut down to the base in late autumn

Himalayan blue poppy 'Mop-head' · Meconopsis 'Mop-head'
Only suitable for particular sites: the soil needs to be neutral to slightly acid, moist but well-drained and enriched with leaf mould or humus to prevent stagnation; in a partially shaded site with shelter from cold, dry winds. Thrives in areas with cool, damp summers
Cut down to the base in late autumn