The competition will reward one retailer with a holiday for two for coming up with the best in-store promotion.
Five regional winners will be treated to a two-night trip to London, including a dinner at which the overall winner will be announced.
Shops will be judged on their sales campaign, including tastings, window and in-store displays and special promotions.
NZW will also tailor-make flyers for merchants to send out to customers and provide consumer information it collects.
Warren Adamson of NZW said: "Independents tend to attract consumers who are keen to try new things and who will trust in recommendations from the staff. The hand-selling of interesting bottles above the average price point is key to sales of New Zealand wines."
The campaign will also give customers the chance to win a trip for two to New Zealand and one of 10 New Zealand gift hampers worth £50.
Last year, more than 50 shops signed up to the promotion. Retailers interested in the promotion should call Warren Adamson on 0207 973 8079 or e-mail firstname.lastname@example.org.
NZW is also holding three trade and consumer tastings in Newcastle, Manchester and Leeds from June 5 to 7.