How to Fertilize noble aeonium?
Diluted low-nitrogen succulent feed once per growing month

noble aeonium · Aeonium nobile
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
Diluted low-nitrogen succulent feed once per growing month