Artist Paul has built installations using pansies at sites of anti-gay hate crime for five years, including 3,000 pansies on London's South Bank where David Morley was murdered in 2004.
Tom said the RHS had welcomed the idea for a confrontational shattered structure with slabs of concrete covering 4,000 pansies designed to metaphorically refect the disruptive nature of homophobic hate crime on society. He explained: "I wanted to show that homophobic crime happens and it shouldn't."
"The RHS liked the structure with the concrete versus the fluffiness of the pansies. There is a grey area between art and gardening."
Tom trained at Merrist Wood College in Surrey in landscape gardening and Paul studied art in Liverpool.
Their first garden show design won best conceptual garden at Hampton Court Flower Show last week. BNE Landscapes was the contractor and Downs View Nurseries provided plants.