The well-known 4-acre Denmans garden is the work of well known garden designer John Brookes, whose studio is based at the garden.
Brookes is one of the pioneers of the concept of the garden being a Room Outside and, as well as the many garden design books he has published, he has also designed more than 1,000 gardens over his long career.
Denmans formerly opened all the year round.
In 1980, Brookes, now 83, established himself at Denmans, a private garden that was then owned by plantswoman Joyce Robinson, who had acquired the garden in the late 1940s.
There was no answer to calls to the garden.
Professional Gardeners Guild and landscapers' Facebook pages suggest the garden has now closed to the public.