I love these plants and saw so many growing beside the roads around the Mt Bold Reservoir here in South Australia that I decided to try and grow them at our place. We live on a larger and hillier than average block with clay and shale so not what you’d call an ideal gardening environment. I bought 3 tiny Grass Tree seedlings from the plant nursery at Belair National Park. I planted them in a little cluster but only 1 survived. I can’t remember what year I bought them but they are very slow growing. In 2012 there was a glorious flowering spike and the plant looks as though it’s in for the long haul. It’s not the kind of Grass Tree that has the growing trunk.
Musings of a Retiring Person 
Oh, this is just lovely! As someone who has nurtured and grown these from seed, I am so pleased to have read this post and can share your delight!
You should be very satisfied that you’ve managed to grow them from seed! I’m pleased as punch I had a survivor from 3 seedlings.