It isnt legal in Australia but some states have decriminilized it making it a mister meaner fine. These states include Western Australia, Australian Capital territory and South Australia and I think Northern territory as well.

Here (Victoria Australia) anything over 20 grams from memory is classed as dealing and they class each seed in your posession as a plant so if you have 2000 seeds they will charge you with having 2000 plants in your posession (Ouch)