Here is a ground cover you may want to consider if it's available in your country.
There isn't much about it on this website, but do a google search for it and you can read more about it.
I have used it extensively in gardens I've done for other people as well as in my own garden. It only grows about 2 inches tall and grows very fast, forming a dense mat and is very good at keeping weeds out. I've used it around roses with no problem at all. It's very drought tolerant once established and can take foot traffic. It roots very easily from cuttings as well.
