Topiary – Rachel De Thame Today, topiary is mostly seen as the preserve of stately homes and formal gardens, out of reach from the rest of us. Rachel de Thame however, thinks that it’s time that this great tradition of trimming and shaping plants returns to all our gardens. Roof Gardens – James Wong James Wong is up on the roof for his revival. Roof Gardens were at their height in the first half of the 20th century but they fell from grace and he now believes the time has come to return them to their rightful place, in a celebration of our gardening heritage.