An unusual powdery blue leaf color makes New Zealand Bur ‘Blue Haze’ bur a stunning groundcover when planted en masse. I planted just a few 4″ pots and it’s spread readily throughout the area – in fact, I need to trim it back a bit each year to keep it in check. I’ve removed it completely from one spot near our stone pathway because I can never seem to trim off the burs before they are ripe and ready to stick to your socks.