How to Prune agave 'Catch a Wave'?
No pruning required

agave 'Catch a Wave' · Agave 'Catch a Wave'
Grow under glass in cactus compost in full light. Water freely in summer, giving a low-nitrogen feed three or four times. Water less in autumn and keep dry in winter. Hardier than most agaves, and may survive outdoors in a warm position in very well-drained, slightly acid soil in full sun. See hardy cacti and succulent cultivation for further advice
No pruning required