Purple Fountain Grass

Pennisetum setaceum 'Rubrum' to give it the correct name. Go large for detail.
We are thinking about putting it (and a couple of others) in the new front bed. However I have just discovered that according to a website it can grow to 1.5 metres (5 feet in old/real money); the label says 70cm which would be much more manageable. Sometimes there can be too much information. I think we will plant and if it groows too tall we will move it.