Can I prune a Cordyline?
This is generally not recommended as any pruning can leave a wound on the plant that can get infected, and it also spoils the symmetry of the plant if it has already developed several heads. The odd head can be carefully sawn off if it is blocking a window for example, but keep pruning to a minimum. However, severe frost can kill the tops of the plants, which will often then re-shoot from the base of the trunk, or half way up if the frost did not damage the entire trunk. This will often take more than a year and the bare trunks are not very attractive, so it is not a good idea to do this deliberately!