The garden will be open daily in September and October whereas previously it was only open at weekends for Autumn.
The owners, Andrewjohn and Eleni Stephenson Clarke, are hoping for an Indian summer in 2012 to tempt plenty of visitors to see the garden later in the year.
Autumn highlights include the Azalea Ring, with an enormous Cornus Kousa, the Italian Garden and the Rose Garden.
"Hopefully it’s going to be sunny this autumn like it has been over the past two weeks," said Eleni Clark. "A lot of visitors have been coming to see us now the weather has improved. We are running a summer quiz for children, and we have the Mystery in Stone sculpture exhibition."
She added that the garden would keep the extra opening days next year if weather conditions are similar.