How to prune matthiola incana 'giant imperial mix'

As each flower spike fades, throughout the cool-season display. Cut each spent spike cleanly back to the nearest healthy side shoot or leaf node using clean secateurs. Remove yellowing basal leaves to maintain airflow. Do not hard-prune the whole plant — instead, harvest stems for the vase regularly, which serves as effective deadheading.

As needed throughout the cool-season flowering period. Giant Imperial stock produces tall, branched spikes that are superb for cutting. As each spike finishes, cut it back to a strong side shoot to encourage further flowering. This mix typically produces multiple stems so there is always something to deadhead. Pruning is light — removing spent spikes is the only task needed.

Cut each spent spike cleanly back to the nearest healthy side shoot or leaf node using clean secateurs. Remove yellowing basal leaves to maintain airflow. Do not hard-prune the whole plant — instead, harvest stems for the vase regularly, which serves as effective deadheading.