I agree with Fiona about the Ficus - they have shocking root systems and should never be used near pools, houses etc. The width of your retaining wall from the photo looks really narrow, so you are going to have trouble growing most things in there; even the Pittosporums will eventually cause structural damage to the walls. The width of any garden bed should be ideally 1.5 metres at least for proper root establishment. This seems to be hard for most people to understand, but the bigger the plant, the wider the root system. So either widen the retaining wall or you will need to keep the plant lower. The pears mentioned also will never work. 5 years is the testing time of a good garden. When first planted they can look great, but they often break down as they grow. The Ficus and Pears' root systems will keep on expanding after the 5 year period with the Ficus having surface roots that cause massive damage to paving, concrete etc. Google it! And I have seen first hand the damage done by another Landscaper's work, based on inexperience. Get professional advice if in doubt - it is worth it if you get a good one. Alison

A nice invasive running bamboo would be the ticket to isolation. Where are you worried about it invading - your neighbor? When it invades your gravel areas, you cut out the running root, big deal. If you built a wall, you would have to maintain that, would you not? I am renting a house that is less than ten feet(3 m) from the highway right-of-way, but about another 20'(about 6 m) from the actual roadway, which is about 5' (150cm) above my first floor. As the road curves, it passes both first and second floor bathroom fulll-size windows, yeh. Bamboo to the rescue! We are saved by the lovely self-sustaining bamboo. No fertilizing, no watering, just an occasional clipping of its toenails, each spring. It doesn't soften the sound of the Harley's though. To keep the bamboo from crawling out of its crib, install a galvanized or aluminum edging that goes down 6-12'(15-30 cm) to contain these babies from escape. And let the neighbor go back to Dungeons & Dragons or Sesame Street for their entertainment.

I have one of those Monika and I would venture to say that you wouldn't be able to cut it flat because with everything around everywhere having the waved top it would look really odd I think, and I doubt whether you would be able to paint it at least until the development is well over or you could find the developers all over you, along with residents who like yourselves have signed to agree to the covenants. A lot of people enter into these developments because there is a better chance of people looking after their properties however I will say that I am the only owner occupied in my part of the street, and I am forever weeding everyone else's garden, picking up the rubbish blown from the sea breeze on new builders not looking after their rubbish and the renters chucking empty beer bottles where they have sat on the steps drinking and throw the bottles into the garden and I actually water the rental alongside me as our gardens join, as yours probably does, and they refuse to water it. I want my place to look nice and if left to these renters it would look like homeless shelters. I think the tall pots and something like the black bamboo could look really good :)

The grey matches the roof, this keeps the look on trend without too many colours, maybe soften the grey with plants behind the fence which have green/grey leaves maybe a hedge type or something softer, get an opinion from a nursery as to what would look the best to soften the look but still all tie in, seems grey is the favoured here but I still think some softness is required. I think the greenery is a soft foil to the roof colour and fence colour and will balance it all out beautifully.