Looks like this image came from a landscape company in South Fremantle WA. Contact them- http://www.hidcote.com.au/contact 

This sounds like a project that may not have a happy ending. It may take some years to become evident, but the idea to plant into under soil level planters will NOT work long-term. And for builders and engineers advising on this when one assumes they know zilch about plants and how they grow, spells disaster. Get some specialist advice from a professional.

Hi Hamish, these planters are very cool! Great potential here. - from what I can see; your home has brown and red tones, it depends on the look you are trying to achieve - however if you were aiming to integrate these planters into the existing colour pallet I would go for something with orange, brown, or red undertones - I know orange sounds frightening! Bare in mind that colours look very different when under direct sunlight, or dark shadows cast by trees etc.. Before painting it's always wise to do a test on a piece of thick paper or cardboard; see how it looks in morning light, afternoon sun, dim light at dusk, and so on... What is the light like at your place? If your home doesn't get much sun I would go for a lighter colour (lighter greys with brown undertones) to bounce off the sunlight that does reach it. A darker colour (browns, oranges) would add impact, a focal point, and would boast the greenery, as the natural colours from your plants would be intensified against a darker backdrop. I have outlined some colours that would look well balanced with the rest of your exterior - Good luck! - I look forward to seeing an update

I have a planter box running the length of my pool - about 8 metres. I am looking for some evergreen low maintenance plants to provide some greenery as in the illustration below. IF anyone can help with suggestions that would be appreciated.