We need photos of the house and site. Where is your home situated? What is the soil drainage like? Some plants like porous soils with limestone, others well drained clay, and others prefer winter wet, summer dry. So need to know more about your site. Alison

After staring at your pics a few times I think I've figured out what's bothering me. The garden bed sticks forward. If you need it for the size of plants in the ground it might work but if you're only going to have pots you can line the edge up with the wall of the house I think? What is the depth of the garden bed? Colour and placement of the pots. The pots look terracotta and the brickwork looks more reddish, is that right? It doesn't look like it goes together. Maybe you can use those pots somewhere else where they aren't right beside the brickwork and get some pots for that location which are either darker and match the trims of the house or are lighter and contrast with the house more. I think the pots need to somehow relate to the windows. If that room could use some privacy or shade you could put two pots in front of the windows. If you want to preserve the view out then you could put three pots against the brickwork. The mulch. It looks too low for the edging. (What is the edging?) The colour, like with the pots, doesn't look like it goes with the rest. I'd go black pebbles or something light in a similar hue to the stone foundation feature. Or maybe scoria?

It's tiny so lends itself to containment and simplicity. I'd shift your mango tree to be a few feet to the front right so it could shade you and hide the view of the boxes. They grow pretty big don't they? The Perth Bricklaying's idea of brick planter boxes is good and I'd surround the sides and front with them. You could have a lower growing hedge all round. Hopefully your neighbour would like a little backdrop to their bit instead of the slabs. By shading from the front you will create less sun and heat for anything growing inside the wall, like the groundcover, and some flowers in pots in the outer corners perhaps. which would be nice to look out on, and obviously watering is the key to their survival. :)

I love Irene's photos and the suggestion to build a wall inside the boundary to square off the front angle, with plantings in front of it. This would be a brave move (I would probably get a landscape designer in for this if you go this way). Otherwise (I haven't read the previous comments, apologies in case I repeat or contradict), I would plant a fuller medium sized tree in the front right side (the deepest part), though centred, not in the point itself! Something like a full Manchurian Pear (though be committed to pruning it to keep it from growing too large, they don't grow too fast, it should be manageable - otherwise try a pretty Snow Pear (my favourite!) or a Bradford for a more compact but pretty shape - you can even pleach (ie take off the lower branches to keep the first metre of trunk nice and bare for a more sculptural look), or if you want something that will keep more compact without too much trouble, a beautiful crepe myrtle (Ilove the white Natchez variety) makes a lovely sculptural feature tree. You can underplant this with a square garden bed with star jasmine (just keep it trimmed to shape) and they look amazing with some under lighting at night (easy DIY kits available these days). Then along the right fence line I would add plantings to keep it private and looking lovely, again I would go Chanticleer ornamental pear (or Capital are even more narrow but I don't love them, though they're very popular). Again you can underplant with hardy, quick growing and low maintenance star jasmine. Then along the driveway on the right side, plant something lower and along the left side (if you have soil here), plant Sweet Viburnum (I love this, we've planted the Dense Fence variety), again, quick growing, beautiful foliage and low maintenance.