How to Prune buttons on a string?
No pruning required

buttons on a string · Crassula rupestris
Also known as: bead vine; necklace vine; rosary vine
Grow under glass in a standard cactus compost, in bright, filtered light or full sun. When in growth feed every two or three weeks with a balanced liquid feed. Water moderately from spring to autumn, sparingly at other times
No pruning required