How to Prune alpine mint bush?
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.

alpine mint bush · Prostanthera cuneata
Grow under glass in a loam-based compost in full light. Grow outdoors in moist but well-drained soil in full sun. Prune after flowering; hard pruning may be detrimental
Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering.