A local garden store or designer will certainly be able to help you. In the meantime, you can look up ideas online, but you'll need to know some basic information before anyone can help you choose specific plants. The first and most important is to know your planting zone, which is all about your location and climate. You also need to know the directional orientation of your house and the wall, and whether it is "full sun", "partial sun", or "shade". Will you be planting on both sides of the wall? You may wind up with vastly different plants if one side gets full sun and the other is in the shade. Take into consideration whatever shade is cast by the large tree, and the house itself. If you have the time, spend a day taking pictures of both sides of the wall - maybe once an hour (shadows will shift somewhat throughout the season), so you may want to do this every few weeks and keep a visual log of how the shadows move. Also, before you plant, decide if you want to paint the wall. It will be easier to paint before you plant, of course. White will reflect heat back onto plants. Climbing plants would look nice on the wall, if you're not going with a very structured garden. Ivy is an obvious choice, but there are other vines that flower beautifully, if you like that idea.

You want very easy care so you won't have to be weeding, pruning, watering and feeding because it is hard work on a steep bank like that. Along the bottom edge, I'd plant a few soft, smaller plants that won't require trimming back and are OK to brush against. Many natives are great for tolerating poor soil and not needing to be nurtured or fussed over. Clumps of hardy grasses - enough of each to make an impact, say groups of 5-7 minimum. Perhaps red tussocks (Chionocloa rubra) for their bronze tints, and Silver tussock (Carex comans) for their graceful light green fronds, and Chionochloa conspicua, which is very pretty in flower, (like a miniature toetoe.) Mix in NZ iris like Libertia perigrinans for its bright orange spear like leaves and it will tolerate clay well. Marlborough rock daisy if it is a dry area. A little further back put in that lavender, smaller hebes for flower and scent, and possibly some of the many miniature flaxes which come in a range of colours. There are a few spreading prostrate coprosmas that are great in areas like this too. If you don't like the bronze rambler but it is growing well, think of it as the background to set off something that you like, so perhaps a spiky silvery plant like an astelia will contrast with it and be a feature, or a little bright green hebe, with white flowers would contrast nicely. Behind those, put the feijoas, full size flaxes, corokias, the larger hebes, pittosporums, and coprosmas.

You could lay a nice curved shape garden by the corner of fence and plant layers starting with 2-3 mtr trees at back down to 50-70 cm high plants at front. This will soften the fence line and give you something to look at while on the slab. Something for the kids also like a small structure to play in, on and around would complete a nice family back yard. If you are handy you can make you own small play ground copying parts of a local ground or there are kit sets available. Good luck,

Ouch, Lancewood! Nice read, FORM :)