The day also saw the official opening of the newly redeveloped display gardens and nursery following two years of improvements.
Head gardener Vaughn Limmer and nursery manager Ian Limmer made speeches.
They have planted 600 roses last year and will plant 600 more this year, as well as 200 shrubs and 30 trees.
The gardens also have new black steel structures supplied by Classic Garden Elements, including a walkway rose pergola.
There is also an aera dedicated to founder Peter Beales, who died in 2013.
Peter Beales will hold a fifth annual rose fetival on 21 June.
Meanwhile, TV presenter Louise Minchin will launch Rosa 'Stanford's Sanctuary' at Chelsea Flower Show, commissioend by the National Trust's Dunham Massey property.
Beales will also launch Rosa 'The Perse Rose' at the event.