There are shitloads of P.subs all around the auckland area as well as 'blue meanies' (a more potent variety) growing out west. NZ subs seem to have a darker colouration to the aus ones, probably due to the wetter and colder climes. They are quite strong and size varies dramatically.
My patch has just started to crank with a few days of rain. I am trying to decide whether I should take another trip as I am still feeling the effects of thrashing them a couple of seasons ago... They can really fuck with you.. Their evil side will become apparent through prolonged use.. be careful and take only in moderation.