Kicking off on Father's Day, 19 June, the event will aim to get as many people as possible to eat outside at least once over the two-week period.
The fortnight will cover the summer solstice, allowing for the optimum number of daylight hours in which to be outside.
All marketing materials for the event are free to horticulture, leisure and outdoor furniture companies that wish to take part in the event. Love the Plot You've Got is also calling for original content from the industry which will be shared on the campaign website and social media.
Consumers will be encouraged to undertake different stages of the journey to preparing for their Al Fresco event across multi-channel communications:
Plan: Do you want your Al Fresco event to be a party on the patio, romantic dinner for two, a family get-together or dinner for Dad?
Prepare: Visit your local garden centre to see what offers are available for Al Fresco Fortnight. Get advice and products on how to refresh your outdoor space to make it great for entertaining.
Enjoy: Host your Al Fresco event and stay out till the sun goes down.
Share: Go on social media and send us some snaps of your Al Fresco event to win prizes.
Keith Nicholson, chair of the Gardening Industry Marketing Board and marketing director of Westland Horticulture, said: "The primary aim of this flagship event is to get people entertaining, eating and enjoying outside and giving them the freedom, inspiration and confidence to enjoy and improve their outside space exactly as they wish.
"We believe that this campaign will inspire consumers to spend more time outside improving the plot they've got and stimulate them to take that all-important first step to going to a garden centre."