The organisation said it acted after it received reports of a risk of local seasonal vegetables destined for the food services sector going to waste, while other veg is in short supply.
A Veg Power spokesman said: “Collectively we can reach millions, and if we unify around a simple hashtag - #SeasonalVeg - we can amplify that message.
“Together we can swing people’s choice towards the wonderful veg coming into season, support the frontline food heroes working hard to bring their crops to our tables and do our bit to reduce waste during the pandemic.
“What are we asking you to do? We are asking you to do what you already do. Whether you create recipes, report on the food sector, or inspire healthier eating please could you do so with a little more focus on the vegetables in season and use the campaign hashtag.
“Wide use of the same hashtag creates momentum around the idea and with your support seasonal vegetables can start to trend – we might even make radishes fashionable.
“The campaign hashtag is #SeasonalVeg, which we have chosen for its simplicity and brand neutrality – we’re not asking you to promote Veg Power, just #SeasonalVeg.”