The Great Gardening Show, owned and run by Good Timing Events from 1997 to 2008 and by Soma Events in 2009, was held annually at Loseley Park near Guildford, Surrey, in July.
Good Timing Events is owned by Julio and Linda Lopez-Calvete and Soma Events is owned by their son Andrew Lopez-Calvete.
But Loseley Park management decided not to renew the booking for 2010, meaning the Great Gardening Show will not be held there this year. Instead, the show will return to five venues and across multiple dates in 2011.
Green Events Solutions, owned by Peter and Amanda Mills, is managing a gardening show at Loseley Park this summer that will be called the Loseley Gardening Show. It will be held on 18-20 June and is a completely new event.
Good Timing Events partner Linda Calvete told HW she would be seeking legal action against Green Event Solutions to prevent the company from marketing the new show as the same event under new management.
Green Events Solutions has already pulped 5,000 leaflets that featured a photograph of the Great Gardening Show for which it did not own the copyright.
Linda Calvete said: "We have advised (Peter Mills) that we are not happy with the situation. We will be taking legal action at some stage. If he changes all his advertising and press releases and says it is a new show, that's fine and there is nothing I can do about that."
She said the Great Gardening Show plans for 2011 would be unveiled at the end of the year and at present included options on five venues.
She added: "The events will be held throughout the year with some in spring and others in autumn, with each one focusing on different plants. They will be run by Soma Events and I will be there in the background as a consultant."
Mills said they had sought legal advice and would proceed accordingly. The Loseley Gardening Show has 46 confirmed exhibitors.