How to Prune Sims aeonium?
No pruning required

Sims aeonium · Aeonium simsii
Grow under glass in a loam-based potting compost with added extra grit. Water moderately when in growth, not at all when dormant. Apply a balanced liquid fertiliser 2 or 3 times in the growing season; for more advice see houseplant cacti and succulent cultivation
No pruning required