Not going into the debate about decrim and even legalizing weed as it pisses me off at how pussy Aus seems to be in that respect. Meh once the baby boomers are gone i see big change
Anyway just a heads up on the coco....i think(?) its the other way around actually. Its VERY easy to overwater with coco as it just has such an amazing potential to store water. If you care to look through the last 100 or so pages (yes i know i wouldnt either) you will see quite a few members said its easy to overwater. That said, i didnt seem to have trouble with it and i used the "flood till runoff" method for majority of the plants life

I think the main problem you should look out for is that the moisture is held for quite some time so watering intervals are longer. HOWEVER this is just my 2 cents based on my last grow where i used it so i might of just been lucky
EDIT: all these posts on seeds and importing is a little upsetting to hear. Importing seeds means potentially importing disease into our otherwise fenced off country. I know its easier said than done but i would love to see an Aussie seed bank or seed exchange. I don't know about other members but i would be more than happy to exchange seeds (no money involved just simply barter x for y as then in my eyes its not dealing etc) once they have established themself as an actual grower and not just the piggies.
P.s In no way is that spill on seeds targeted at anyone. I too have asked for seed bank sites with the thought of importing and still thinking of getting some if i can't find the strain i want here. It just shits me that because of the demonisation of it you can't simply send it through customs where they could perform the right tests to make sure they disease free. I would gladly pay a lil extra knowing i havnt imported Virus "x".