Sayed...I looked at your photo and thought, "What's a capsicum and isn't that a red pepper?" I looked up capsicum and found that it was what we call a red pepper. You must have a flat roof if you have a roof garden. I don't have a flat roof or a roof garden; so I'm not sure in this wilderness where I could plant anything so beautiful. Unless I put up a massive fence, the deer would get there first. Unless I put wire mesh down and build an elevated garden, the gophers and moles would have a feast. Then there are the ground squirrels, rabbits, and the hungry birds. Nope, it's easier just to enjoy your photo and then head down to the farmer's market for some fresh red bell peppers.