Gregory, from Surrey-based Landform Consultants, will build his 150th RHS show garden at this year's RHS Chelsea Flower Show.
The Hartley Botanic Garden on Chelsea's Main Avenue is set to be a momentous garden for the Landform team as they hope to take home another RHS title. It is designed by Landform's lead designer Catherine MacDonald, one of seven female garden designers showcasing on Main Avenue this year.
Gregory, who is MD of Landform, said: "This is a really significant moment for both myself and Landform. I'm thrilled to be celebrating my 150th RHS show garden at the world's greatest flower show. RHS Chelsea has a really special place in my heart and I have been so fortunate to play such a pivotal role in what is the jewel in the crown of the RHS show season.
"I'm so privileged to have such a phenomenally hard working team behind me. Working behind the scenes, they often go unmentioned, but their hard work and attention to detail combined with the designer's vision is what makes all eyes turn to Chelsea in the last week of May. I worked out that I've spent over three years of my life at the grounds of the Royal Hospital so what better place to build my 150th RHS show garden."
Landform has been in business for 13 years. Gregory is also a regular RHS judge and assessor, and is chairman of the Association of Professional Landscapers (APL) and a director at the Horticultural Trades Association (HTA).
His 150th garden will see him joined by a team of WorldSkills UK competition winners who will form the team building the garden, with help from fellow landscaper Jody Lidgard.