Two plants I can suggest that I have chosen for my garden, are virtually unkillable, will grow in almost ANY soil or weather conditions & require little maintenance are: butterfly/african iris & Celtic Cascade tree. Both can be left to go a little wild for a natural look, or be cared for, to fit perfectly in a more formal garden. In regards to the iris, I removed my entire garden of mature, property damaging trees when I moved into my new house, but didn't want to wait years for a new mature garden, so I searched online for ppl selling/giving fully grown specimens away before they did renovations or re landscaped! The plants were a cinch to dig up, replant in my heavy clay soil & are thriving! I even cut some of them in half before planting and it didn't phase them!

I'm in the process of leveling off my backyard (1 in 8 slope roughly) using a mixture of heron blocks, pavers and turf. Had to deal with red heavy clay that was under the existing topsoil that came out of the cut excavation. As others have said, gypsum is your friend. I would also recommend a thick geofabric over disturbed areas that you might not be covering for a while but you still need to traffic. Just use tent pegs to pin it down. Works wonders especially over clays during rain, minimises dust and keeps a good moisture content of the clay. Get a heap of good topsoil delivered from a landscape yard. Be sure to go and check it out first tho - feel it in your hands and smell the organic matter to decide what you like. In term of trees frangipanis will look great in the warmer months as a screen - flowering and very leafy, in the winter they will drop leaves and won't screen much. I have a fairly large one at the front of mine and i really like it - I Would recommend planting elsewhere in the yard. I don't know much about trees but i hear lillypillies establish and grow fast and screen well. Good luck

VERY CLEVER and looks SO inviting!! The way you've created such a usable and friendly area and atmosphere. Congrats.

Ali, I think you are overthinking this, let your back garden be more natural as a contrast to the structured effect of the tiles in the house. I don't think you need consistency, the pool changes the whole vibe of the area so design for the pool to create a welcoming oasis - think tropical island resort. Have you checked with your local Council if there are limits of hardscape you can have? Some Councils do limit this and that will include your roof, driveway, paths, patios, the pool, etc. As well if you want this much hardscape you will need to consider runoff and drainage, particularly to ensure your neighbours don't get swamped in heavy rain or you have areas that puddle and take days to dry out. Consider summer heat too, sitting outside and the radiated heat that comes off hard surfaces, white and light colours reflect heat while dark colours absorb it. As well too much hardscape does not absorb noise - your neighbours will hear all your conversations and noise from the pool will be amplified. If you want that pool area to be inviting, then it needs lush greenery around it to offset this and soften and cool. Carrara marble tiles around a pool look fabulous and would be a great contrast to your dark tiles indoors. The area outside your kitchen should be grassed and include gardens as space for your dogs, even a small tree or two for the environment and to create shade for the dogs. Artificial turf gets extremely hot and would certainly not provide a pleasant or suitable outdoor space for them. I think I would read up on the breed of dog you plan to get also and fully ascertain their needs to ensure you provide properly for them. If you are planning children down the track, they will want a nice safe, green area to play too.