Progress has been made!!
We still need to be able to access the front windows for the purpose of putting up shutters, so I promised my DH to leave about a foot away from them so he can get behind the plants. I suppose I should also refrain from planting anything too prickly there....
Here is what it looks like now. I am still trying to decide what to plant in the section where the 'riverbed' veers away from the windows. Suggestions?
My Aloe striata has been given pride of place on the little mound, I love that plant.