I'm having a patio laid and leaving about 7 inch gap between slabs and the house wall which is to be filled with grit. I'll be 1 brick below the damp proof course. I saw a garden on the tv with low sedums growing in the grit which looked lovely. Do you think this would be ok to do? Will the plants grow in the grit? If so what sort of grit should I use? Also do you think it may be too near the damp roof course? If so what can I do about that?
Thanks hope you can help. I'm in hertfordshire.