Late last year, Walmart started adding purple sign s to shelves to help shoppers notice organic items, Bratspies said in November. “That is one thing I would say we haven’t done a good enough ...

Walmart actually offers 1,600 organic grocery items, including a line of packaged goods from the Wild Oats brand, which once was a chain of natural-food stores that was bought by Whole Foods.

Ask them whether organic is better, however, and nine of them will say that it is. That’s the data coming from Walmart’s internal research, which found that 91 percent of the giant American ...

Even Walmart announced last month that it would begin offering organic food products from Wild Oats at a fraction of competitors’ costs. In short, Whole Foods’ grip on the organic market is ...