Seabrook, The Sun’s gardening editor, and Horticulture Week columnist, will stage a display in the Lawrence Hall which aims to be informative and educational, with fruit and vegetables present to demonstrate how planting methods have changed through the years and featuring the giant Begonia ‘whopper’.
Seabrook is celebrating 50 years in horticultural journalism and 60 years working in the industry. He originally trained as a florist.
He said: "It is 62 years since, as a school boy I visited and was knocked out by my first RHS Flower Show and having attended them pretty well every year since, on many occasions growing plants to stage there, it seems appropriate to celebrate the fact at the RHS London Shades of Autumn Show.
"RHS shows are great places to see plants you haven't seen before and for like-minded, enthusiastic gardeners to meet."
Seabrook is known for his work championing school gardening during his time in the industry.
For the first time this year the show will also feature exhibits of botanical art alongside the RHS Photography exhibit and a 3D printing exhibition.