We have to wait for NZ hours for him to reply... but in the interim let me add: any tree is worth growing! It is certainly a conifer of some type (ie not a weed) and even though it is a small thing now, there is something rewarding about starting a tree that will likely outlive you.
And if it is a NZ native... there are probably tons of people on this site curious about learning more. NZ doesn't as a rule export many of its native plants.