"Grow to Love ..." is being run by Horticulture Wales, based at Glyndwr University in Wrexham.
Cards will be distributed giving food ideas, facts and nutritional information on a range of fruit and vegetables.
"The cards are designed to be used in store at the point of sale and can be popped into vegetable boxes or given to customers at farmers' markets," said project manager Helen Eustace.
"Through providing more information and ideas for consumers, we hope that growers will see an additional benefit in terms of increased levels of seasonal sales and also in helping to overcome issues with gluts of produce."
The campaign is funded by the Welsh Government and the European Agricultural Fund for Rural Development. Cards are available from Horticulture Wales by calling 01978 293967.