Posted: 16/05/2012 at 18:53
Wow, really helpful advice, thanks all!
Now that the tree has arrived and I can see how very small it is it's obvious that I can't plant it directly in the large planter yet - it would look ridiculous if nothing else!
So I shall pot it up in stages to make sure it's happily contained. Great idea to put the pot in the planter with some other things around the edge and gradually let the tree take over as I pot it up.
I'd also got a little confused over the differing types of compost suggested online, so I think I'll go with half ericaceous and half mp compost, and avoid tap water 'cause it's really hard down here.