How to Fertilize Sempervivum 'Blue Boy'?
Very dilute low-nitrogen succulent feed monthly in warm growth

Sempervivum 'Blue Boy' · Sempervivum 'Blue Boy'
Grow in poor to moderately fertile, sharply drained soil in full sun. In pots use a 50:50 mix of loam-based potting compost and grit. See hardy cacti and succulent cultivation
Very dilute low-nitrogen succulent feed monthly in warm growth