How to Prune pineapple lily 'Goliath'?
No pruning required

pineapple lily 'Goliath' · Eucomis pallidiflora 'Goliath'
Plant bulb deeply, at least 15cm deep, to support the very tall stem, in fertile, humus-rich, well-drained soil in a sheltered position in full sun. Mulch well in colder areas. Tall flower spikes may need staking. See eucomis cultivation
No pruning required