How to Prune sneezeweed 'Double Trouble'?
No pruning required, but deadheading will prolong flowering

sneezeweed 'Double Trouble' · Helenium 'Double Trouble'
Grow in full sun in fertile, moisture-retentive, humus-rich soil, and provide support for the tall stems; divide every two to three years to maintain vigour
No pruning required, but deadheading will prolong flowering