nevermind, just found it!

I found a site earlier this year that you chose which area you lived in, possibly it was the state, and they showed you which weeds were blooming at the time. I thought I saved it but I was looking for it today and it's no longer in my favs. Anyone have an idea of which site I'm talking about?

Check out your local Home Depot ,or Lowes, or even BMC. They have some very affordable options.

Have you got a branch of the treecrops association, or farm forestry in your area? I'm not sure if this species is used much in NZ for shelter belts or similar but they would reasonably know. Another place to enquire could be Forest Research in Rotorua. I know there are long memories and good networks there.