How to prune matthiola incana 'katz sakura'

As each flower spike finishes, throughout the cool-season flowering period. Cut the spent main spike back to a healthy side-shoot node. If lateral branches have formed, allow them to develop their own flower spikes. Remove any yellowing lower leaves to improve airflow and reduce botrytis risk.

As needed throughout the cool-season flowering period. Stock 'Katz Sakura' is a cool-season annual grown for its intensely fragrant spikes. Once a spike is spent, cut it back to encourage side shoots to bloom. This is the key pruning task. Plants do not respond well to hard overall cutbacks — focus on removing spent spikes to extend the season as long as cool weather persists.

Cut the spent main spike back to a healthy side-shoot node. If lateral branches have formed, allow them to develop their own flower spikes. Remove any yellowing lower leaves to improve airflow and reduce botrytis risk.