Hi.I noticed no response to your question so I thought I'd give a response however I'm no maple expert and I'm not really familiar with Perth climate.I don't have a canadian maple but do have a few Jap maples.From my experience maples prefer a sheltered position from any hot,dry winds and regular water to help avoid damage to leaves in summer.Unfortunately I think you might not get good autumn colour as they need some cool nights in autumn to promote colour and being on the coast I feel the temp might not get cool enough.I've read that tapering off the water starting late summer can help colour so you could try that.The jap maple is not a large tree and is a nice tree even if autumn colour doesn't happen for you.I think the Canadian maple would grow into a larger tree than the jap maple.Give them a go however as you won't know unless you try.Good luck,hope this helps, C.N.

Thanks for your response, CN! I asked my garden guy and he assured me they do turn red in Perth as he has planted several. Since my suburb is near the coast, I'll just have to try and see for myself. He also told me the reason I haven't seen any in Perth is because people usually have them in the backyard. I'm planting mine out front as it's rather bare, being a very new housing development and several lots are not built up yet.

Go for it!Make sure they get regular water especially when first planted.They do like regular water however that said,I have seen good specimens in non gardeners gardens which only receive rainfall and nothing else.I'd stake them well in addition as they can be a little brittle in early years.May I suggest if you can also place wire tree guards supported by steel star pickets it might help stop the footpath vandals from walking past and ripping them out of the ground (I speak from experience here)good luck,regards C.N.

I know it's been 12 years since you wrote this post but I live in Perth and I have a Japanese Maple and a Katsura being delivered to me and I really would like to know how this experiment worked. If the tree survived it should be very well established by now.