hi, just wondering is this plant/grass annual or perennial? I'm confused because from what i gathered in the net, it says that it's an annual, while the nursey guy said that it's perennial. Hopefully it's perennial because it cost me 4x $9AUD...it would make a striking feature near my driveway and in a black pot. If this is annual, how do i collect seeds from this grass and how can i tell it from "seed" and dead material? ur help is appreciated. In case u don't know what this grass is: http://www.em.ca/garden/gra_pennisetum_setaceum_rubrum1.html Btw, i just planted 2 of this grass in a pot, leaving 10cm apart...will this form of planting going to "kill" this grass?