In my townhouse in downtown Toronto I have a 12' x 13' patio ( approx) with a very high concrete wall at the back (15') and lattice wood fence on either side. I am looking for a landscape contractor in Toronto who can create a beautiful outdoor small space, with room for a small seating and eating area. I am thinking of a long and high planter across the back wall with tall grasses to hide the concrete. .I would appreciate any recommendations.