I have a Treefern (Tasmanian I think) growing under my pergola. It was supposed to be a dwarf fern. It's stem is now 150cm high before the fronds start. It just keeps getting taller and taller with new fronds growing from the middle and old ones around the edge dying. It is too tall for my liking now.
Can I cut it 30cm above the ground and have it continue growing or will that kill it, or make it sprout at the base?