I have this space in front of the house that has no practical use. I kept those stones to paint them in different colours as decoration. Didn't get to do it. Now the grass and weeds are a menace. I want to:
(a) fill the cracks with some cement. Could you suggest what I can put in between the slabs to prevent growth?
(b) what is the grass and what herbicide is best for it.
(c) any low-maintenance ideas to beautify the place. 
