New York (CNN Business) Produce is the first thing customers see when they enter Walmart and a key part of the retailer's defense against Amazon. So Walmart is giving its produce aisles a makeover.

The largest grocer in the United States announced Wednesday that it will renovate produce areas with new signs highlighting prices and shorter merchandise bins to create an "open market feel" for customers. Walmart will also move all of its organic items into a single area of the department to make them easier to find. And it will widen the aisles to try to keep them from clogging up with customers and employees who pick up online grocery orders

New "Produce 2.0" sections at Walmart.

Online grocery shopping has "fundamentally changed the way we operate our food business within the store," said Charles Redfield, executive vice president of food at Walmart's US business. "We've always got associates in the produce area. This layout created more space in the department to allow room for customers to shop."

The revamp, which Walmart has dubbed "Produce 2.0," has already started at more than 200 stores. Walmart expects to complete it at the majority of its 4,700 US stores by next summer.

Produce is an important category for grocers because 95% of shoppers prefer to buy it in store. And that number is growing. Produce sales grew 2.6% last year, according to a Nielsen study published earlier this year.

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