More than 70 people attended the day which encompassed a mix of technical presentations and demonstrations on the pitch.
Mike Atherton from King William College said:
"We’ve never had an event like this here before. It’s not been for the lack of trying, but the wait has been worthwhile.
"Having been aware of the Dennis & Sisis seminars, which are held all over the country, I can only offer my thanks to them for their level of commitment to their customers and groundsmanship in general, by way of committing so much effort in coming to the Isle of Man. We’re all so pleased to have been able to take part in such a successful seminar."