We have this large and a couple of tiny specimens of thus attractive plant in our garden. I'd like to move them but would like to know how big it'll get before I do so. Here are some details:
Larger one about 2m tall, age unknown
Seems to be thriving in volcanic soil in the sun
Evergreen
New stems appear reddish, as do leaf spines from the back (light green from the front)
Comes out of the ground in a cluster of about a dozen trunks, which are long and stringy
Leaves 8-10cm, pointy at the end, 3-4 cm wide
Any help would be appreciated and happy to provide more info if you can tell me what to look for!