Wharton's managing director Robert Wharton said: "The visit and meeting was to discuss various types of pest, disease and weed control.
"Irrigation types were overhead verses capillary/flood-mat or spaghetti tubes. There are numerous options, although the discussions were to share experience and to co-operate and understand problems facing UK rose growers today."
His son Paul Wharton also discussed modern tractor spraying techniques with visitors from David Austin Roses with their managing director Tony Slack third and Whartons general manager James Taylor.
The manufacturers of the 'Landquip' tractor spraying equipment later joined the group for further discussions.
Other technical matters were also discussed which included preferred types of irrigation, biocontrol of plant pests and pre-emergent weed control materials.