Just realised this is a stupid question - unless the NZ textures are changes (like Orbx) then they would be the same as everywhere else with the same landclass. The reason I asked this is because I wanted to blend some thing in with default, but I guess I can just load up in the place I'm working at and change the seasons and get the right colours.
Don't worry if this doesn't make sense .....I'm just really telling myself.
What imagery are you using? If it is from anywhere decent (i.e. proper orthophotography) id leave it as is.....the colour/textures will change somewhere down the track and then yours will be left looking out of place