Arla Foods is launching its biggest-ever on-pack promotion for Lurpak, offering 'Grow your own herbs' kits on special promotional packs of its reduced-salt and reduced-fat butters.

The campaign, which kicks off on Monday, will see free pellets containing basil, thyme, dill and parsley seeds attached to 7.3 million 500g packs of Lurpak Slightly Salted and Lurpak Lighter packs.

Arla said the campaign was aimed at "rewarding" customers for their good food choices and would create greater shelf stand-out.